deps: update libuv to v0.11.28

60 files changed, 3243 insertions, 928 deletions

diff --git a/deps/uv/.mailmap b/deps/uv/.mailmap
index 89c1adec4d..2ca07c8381 100644
--- a/deps/uv/.mailmap
+++ b/deps/uv/.mailmap
@@ -1,3 +1,4 @@
+Aaron Bieber <qbit@deftly.net> <deftly@gmail.com>
 Alan Gutierrez <alan@prettyrobots.com> <alan@blogometer.com>
 Andrius Bentkus <andrius.bentkus@gmail.com> <toxedvirus@gmail.com>
 Bert Belder <bertbelder@gmail.com> <info@2bs.nl>
@@ -5,6 +6,7 @@ Bert Belder <bertbelder@gmail.com> <user@ChrUbuntu.(none)>
 Brandon Philips <brandon.philips@rackspace.com> <brandon@ifup.org>
 Brian White <mscdex@mscdex.net>
 Brian White <mscdex@mscdex.net> <mscdex@gmail.com>
+Caleb James DeLisle <cjd@hyperboria.ca> <cjd@cjdns.fr>
 Christoph Iserlohn <christoph.iserlohn@innoq.com>
 Fedor Indutny <fedor.indutny@gmail.com> <fedor@indutny.com>
 Frank Denis <github@pureftpd.org>
@@ -15,6 +17,8 @@ Keno Fischer <kenof@stanford.edu> <kfischer@college.harvard.edu>
 Maciej Małecki <maciej.malecki@notimplemented.org> <me@mmalecki.com>
 Marc Schlaich <marc.schlaich@googlemail.com> <marc.schlaich@gmail.com>
 Rasmus Christian Pedersen <ruysch@outlook.com>
+Rasmus Christian Pedersen <ruysch@outlook.com>
+Rasmus Christian Pedersen <ruysch@outlook.com>
 Rasmus Christian Pedersen <zerhacken@yahoo.com> <ruysch@outlook.com>
 Rasmus Pedersen <ruysch@outlook.com> <zerhacken@yahoo.com>
 Robert Mustacchi <rm@joyent.com> <rm@fingolfin.org>
diff --git a/deps/uv/AUTHORS b/deps/uv/AUTHORS
index e3de576233..19f911f113 100644
--- a/deps/uv/AUTHORS
+++ b/deps/uv/AUTHORS
@@ -146,3 +146,12 @@ HungMingWu <u9089000@gmail.com>
 Jay Satiro <raysatiro@yahoo.com>
 Leith Bade <leith@leithalweapon.geek.nz>
 Peter Atashian <retep998@gmail.com>
+Tim Cooper <tim.cooper@layeh.com>
+Caleb James DeLisle <cjd@hyperboria.ca>
+Jameson Nash <vtjnash@gmail.com>
+Graham Lee <ghmlee@ghmlee.com>
+Andrew Low <Andrew_Low@ca.ibm.com>
+Pavel Platto <hinidu@gmail.com>
+Tony Kelman <tony@kelman.net>
+John Firebaugh <john.firebaugh@gmail.com>
+lilohuang <lilohuang@hotmail.com>
diff --git a/deps/uv/ChangeLog b/deps/uv/ChangeLog
index 50d39893a2..db13f188c6 100644
--- a/deps/uv/ChangeLog
+++ b/deps/uv/ChangeLog
@@ -1,4 +1,93 @@
-2014.06.28, Version 0.11.26 (Unstable)
+2014.08.08, Version 0.11.28 (Unstable)
+
+Changes since version 0.11.27:
+
+* unix, windows: const-ify handle in uv_udp_getsockname (Rasmus Pedersen)
+
+* windows: use UV_ECANCELED for aborted TCP writes (Saúl Ibarra Corretgé)
+
+* windows: add more required environment variables (Jameson Nash)
+
+* windows: sort environment variables before calling CreateProcess (Jameson
+  Nash)
+
+* unix, windows: move uv_loop_close out of assert (John Firebaugh)
+
+* windows: fix buffer overflow on uv__getnameinfo_work() (lilohuang)
+
+* windows: add uv_backend_timeout (Jameson Nash)
+
+* test: disable tcp_close_accept on Windows (Saúl Ibarra Corretgé)
+
+* windows: read the PATH env var of the child (Alex Crichton)
+
+* include: avoid using C++ 'template' reserved word (Iñaki Baz Castillo)
+
+* include: fix version number (Saúl Ibarra Corretgé)
+
+
+2014.07.32, Version 0.11.27 (Unstable), ffe24f955032d060968ea0289af365006afed55e
+
+Changes since version 0.11.26:
+
+* unix, windows: use the same threadpool implementation (Saúl Ibarra Corretgé)
+
+* unix: use struct sockaddr_storage for target UDP addr (Saúl Ibarra Corretgé)
+
+* doc: add documentation to uv_udp_start_recv (Andrius Bentkus)
+
+* common: use common uv__count_bufs code (Andrius Bentkus)
+
+* unix, win: add send_queue_size and send_queue_count to uv_udp_t (Andrius
+  Bentkus)
+
+* unix, win: add uv_udp_try_send (Andrius Bentkus)
+
+* unix: return UV_EAGAIN if uv_try_write cannot write any data (Saúl Ibarra
+  Corretgé)
+
+* windows: fix compatibility with cygwin pipes (Jameson Nash)
+
+* windows: count queued bytes even if request completed immediately (Saúl
+  Ibarra Corretgé)
+
+* windows: disable CRT debug handler on MinGW32 (Saúl Ibarra Corretgé)
+
+* windows: map ERROR_INVALID_DRIVE to UV_ENOENT (Saúl Ibarra Corretgé)
+
+* unix: try to write immediately in uv_udp_send (Saúl Ibarra Corretgé)
+
+* unix: remove incorrect assert (Saúl Ibarra Corretgé)
+
+* openbsd: avoid requiring privileges for uv_resident_set_memory (Aaron Bieber)
+
+* unix: guarantee write queue cb execution order in streams (Andrius Bentkus)
+
+* img: add logo files (Saúl Ibarra Corretgé)
+
+* aix: improve AIX compatibility (Andrew Low)
+
+* windows: return bind error immediately when implicitly binding (Saúl Ibarra
+  Corretgé)
+
+* windows: don't use atexit for cleaning up the threadpool (Saúl Ibarra
+  Corretgé)
+
+* windows: destroy work queue elements when colsing a loop (Saúl Ibarra
+  Corretgé)
+
+* unix, windows: add uv_fs_mkdtemp (Pavel Platto)
+
+* build: handle platforms without multiprocessing.synchronize (Saúl Ibarra
+  Corretgé)
+
+* windows: change GENERIC_ALL to GENERIC_WRITE in fs__create_junction (Tony
+  Kelman)
+
+* windows: relay TCP bind errors via ipc (Alexis Campailla)
+
+
+2014.06.28, Version 0.11.26 (Unstable), 115281a1058c4034d5c5ccedacb667fe3f6327ea
 
 Changes since version 0.11.25:
 
diff --git a/deps/uv/Makefile.am b/deps/uv/Makefile.am
index ebcd8db2e2..861b632bbf 100644
--- a/deps/uv/Makefile.am
+++ b/deps/uv/Makefile.am
@@ -17,7 +17,7 @@ ACLOCAL_AMFLAGS = -I m4
 AM_CPPFLAGS = -I$(top_srcdir)/include \
               -I$(top_srcdir)/src
 
-include_HEADERS=include/uv.h include/uv-errno.h include/uv-version.h
+include_HEADERS=include/uv.h include/uv-errno.h include/uv-threadpool.h include/uv-version.h
 
 CLEANFILES =
 
@@ -28,6 +28,7 @@ libuv_la_SOURCES = src/fs-poll.c \
                    src/heap-inl.h \
                    src/inet.c \
                    src/queue.h \
+                   src/threadpool.c \
                    src/uv-common.c \
                    src/uv-common.h \
                    src/version.c
@@ -67,7 +68,6 @@ libuv_la_SOURCES += src/win/async.c \
                     src/win/stream-inl.h \
                     src/win/tcp.c \
                     src/win/thread.c \
-                    src/win/threadpool.c \
                     src/win/timer.c \
                     src/win/tty.c \
                     src/win/udp.c \
@@ -99,7 +99,6 @@ libuv_la_SOURCES += src/unix/async.c \
                    src/unix/stream.c \
                    src/unix/tcp.c \
                    src/unix/thread.c \
-                   src/unix/threadpool.c \
                    src/unix/timer.c \
                    src/unix/tty.c \
                    src/unix/udp.c
@@ -197,6 +196,7 @@ test_run_tests_SOURCES = test/blackhole-server.c \
                          test/test-tcp-write-to-half-open-connection.c \
                          test/test-tcp-writealot.c \
                          test/test-tcp-try-write.c \
+                         test/test-tcp-write-queue-order.c \
                          test/test-thread.c \
                          test/test-threadpool-cancel.c \
                          test/test-threadpool.c \
@@ -215,6 +215,8 @@ test_run_tests_SOURCES = test/blackhole-server.c \
                          test/test-udp-open.c \
                          test/test-udp-options.c \
                          test/test-udp-send-and-recv.c \
+                         test/test-udp-send-immediate.c \
+                         test/test-udp-try-send.c \
                          test/test-walk-handles.c \
                          test/test-watcher-cross-stop.c
 test_run_tests_LDADD = libuv.la
@@ -228,7 +230,7 @@ test_run_tests_SOURCES += test/runner-unix.c \
 endif
 
 if AIX
-test_run_tests_CFLAGS += -D_ALL_SOURCE -D_XOPEN_SOURCE=500
+test_run_tests_CFLAGS += -D_ALL_SOURCE -D_XOPEN_SOURCE=500 -D_LINUX_SOURCE_COMPAT
 endif
 
 if SUNOS
@@ -237,7 +239,7 @@ endif
 
 
 if AIX
-libuv_la_CFLAGS += -D_ALL_SOURCE -D_XOPEN_SOURCE=500
+libuv_la_CFLAGS += -D_ALL_SOURCE -D_XOPEN_SOURCE=500 -D_LINUX_SOURCE_COMPAT
 libuv_la_SOURCES += src/unix/aix.c
 endif
 
diff --git a/deps/uv/Makefile.mingw b/deps/uv/Makefile.mingw
index a0b7cc941f..156f15dab1 100644
--- a/deps/uv/Makefile.mingw
+++ b/deps/uv/Makefile.mingw
@@ -26,6 +26,7 @@ CFLAGS += -Wall \
 INCLUDES = include/stdint-msvc2008.h \
            include/tree.h \
            include/uv-errno.h \
+           include/uv-threadpool.h \
            include/uv-version.h \
            include/uv-win.h \
            include/uv.h \
@@ -42,6 +43,7 @@ INCLUDES = include/stdint-msvc2008.h \
 
 OBJS = src/fs-poll.o \
        src/inet.o \
+       src/threadpool.o \
        src/uv-common.o \
        src/version.o \
        src/win/async.o \
@@ -63,7 +65,6 @@ OBJS = src/fs-poll.o \
        src/win/stream.o \
        src/win/tcp.o \
        src/win/thread.o \
-       src/win/threadpool.o \
        src/win/timer.o \
        src/win/tty.o \
        src/win/udp.o \
diff --git a/deps/uv/README.md b/deps/uv/README.md
index e0e73591d5..364cf695c4 100644
--- a/deps/uv/README.md
+++ b/deps/uv/README.md
@@ -1,10 +1,12 @@
-# libuv
+![libuv][libuv_banner]
+
+## Overview
 
 libuv is a multi-platform support library with a focus on asynchronous I/O. It
 was primarily developed for use by [Node.js](http://nodejs.org), but it's also
 used by Mozilla's [Rust language](http://www.rust-lang.org/),
 [Luvit](http://luvit.io/), [Julia](http://julialang.org/),
-[pyuv](https://crate.io/packages/pyuv/), and [others](https://github.com/joyent/libuv/wiki/Projects-that-use-libuv).
+[pyuv](https://github.com/saghul/pyuv), and [others](https://github.com/joyent/libuv/wiki/Projects-that-use-libuv).
 
 ## Feature highlights
 
@@ -141,3 +143,4 @@ See the [guidelines for contributing][].
 [Python]: https://www.python.org/downloads/
 [Visual Studio Express 2010]: http://www.microsoft.com/visualstudio/eng/products/visual-studio-2010-express
 [guidelines for contributing]: https://github.com/joyent/libuv/blob/master/CONTRIBUTING.md
+[libuv_banner]: https://raw.githubusercontent.com/joyent/libuv/master/img/banner.png
diff --git a/deps/uv/configure.ac b/deps/uv/configure.ac
index 0423c8cea8..ac789524b5 100644
--- a/deps/uv/configure.ac
+++ b/deps/uv/configure.ac
@@ -13,7 +13,7 @@
 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 AC_PREREQ(2.57)
-AC_INIT([libuv], [0.11.26], [https://github.com/joyent/libuv/issues])
+AC_INIT([libuv], [0.11.28], [https://github.com/joyent/libuv/issues])
 AC_CONFIG_MACRO_DIR([m4])
 m4_include([m4/libuv-extra-automake-flags.m4])
 m4_include([m4/as_case.m4])
diff --git a/deps/uv/gyp_uv.py b/deps/uv/gyp_uv.py
index f0c59d0786..f5afc6da2d 100755
--- a/deps/uv/gyp_uv.py
+++ b/deps/uv/gyp_uv.py
@@ -6,6 +6,13 @@ import os
 import subprocess
 import sys
 
+try:
+  import multiprocessing.synchronize
+  gyp_parallel_support = True
+except ImportError:
+  gyp_parallel_support = False
+
+
 CC = os.environ.get('CC', 'cc')
 script_dir = os.path.dirname(__file__)
 uv_root = os.path.normpath(script_dir)
@@ -94,6 +101,11 @@ if __name__ == '__main__':
   if not any(a.startswith('-Dcomponent=') for a in args):
     args.append('-Dcomponent=static_library')
 
+  # Some platforms (OpenBSD for example) don't have multiprocessing.synchronize
+  # so gyp must be run with --no-parallel
+  if not gyp_parallel_support:
+    args.append('--no-parallel')
+
   gyp_args = list(args)
   print gyp_args
   run_gyp(gyp_args)
diff --git a/deps/uv/img/banner.png b/deps/uv/img/banner.png
new file mode 100644
index 0000000000..7187daa2e5
--- /dev/null
+++ b/deps/uv/img/banner.png
diff --git a/deps/uv/img/logos.svg b/deps/uv/img/logos.svg
new file mode 100644
index 0000000000..d6185f8b19
--- /dev/null
+++ b/deps/uv/img/logos.svg
@@ -0,0 +1,152 @@
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+             inkscape:connector-curvature="0" />
+          <path
+             id="path92"
+             style="fill:#5d802f;fill-opacity:1;fill-rule:nonzero;stroke:none"
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+             id="path94"
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+             inkscape:connector-curvature="0" />
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+      </g>
+    </g>
+  </g>
+</svg>
diff --git a/deps/uv/include/uv-aix.h b/deps/uv/include/uv-aix.h
new file mode 100644
index 0000000000..7dc992fa6d
--- /dev/null
+++ b/deps/uv/include/uv-aix.h
@@ -0,0 +1,32 @@
+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef UV_AIX_H
+#define UV_AIX_H
+
+#define UV_PLATFORM_LOOP_FIELDS                                               \
+  int fs_fd;                                                                  \
+
+#define UV_PLATFORM_FS_EVENT_FIELDS                                           \
+  uv__io_t event_watcher;                                                     \
+  char *dir_filename;                                                         \
+
+#endif /* UV_AIX_H */
diff --git a/deps/uv/include/uv-threadpool.h b/deps/uv/include/uv-threadpool.h
new file mode 100644
index 0000000000..9708ebdd53
--- /dev/null
+++ b/deps/uv/include/uv-threadpool.h
@@ -0,0 +1,37 @@
+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+/*
+ * This file is private to libuv. It provides common functionality to both
+ * Windows and Unix backends.
+ */
+
+#ifndef UV_THREADPOOL_H_
+#define UV_THREADPOOL_H_
+
+struct uv__work {
+  void (*work)(struct uv__work *w);
+  void (*done)(struct uv__work *w, int status);
+  struct uv_loop_s* loop;
+  void* wq[2];
+};
+
+#endif /* UV_THREADPOOL_H_ */
diff --git a/deps/uv/include/uv-unix.h b/deps/uv/include/uv-unix.h
index d59d743ef2..bbaaefc3ed 100644
--- a/deps/uv/include/uv-unix.h
+++ b/deps/uv/include/uv-unix.h
@@ -42,8 +42,12 @@
 #endif
 #include <signal.h>
 
+#include "uv-threadpool.h"
+
 #if defined(__linux__)
 # include "uv-linux.h"
+#elif defined(_AIX)
+# include "uv-aix.h"
 #elif defined(__sun)
 # include "uv-sunos.h"
 #elif defined(__APPLE__)
@@ -96,13 +100,6 @@ struct uv__async {
   int wfd;
 };
 
-struct uv__work {
-  void (*work)(struct uv__work *w);
-  void (*done)(struct uv__work *w, int status);
-  struct uv_loop_s* loop;
-  void* wq[2];
-};
-
 #ifndef UV_PLATFORM_SEM_T
 # define UV_PLATFORM_SEM_T sem_t
 #endif
@@ -218,7 +215,7 @@ typedef struct {
 
 #define UV_UDP_SEND_PRIVATE_FIELDS                                            \
   void* queue[2];                                                             \
-  struct sockaddr_in6 addr;                                                   \
+  struct sockaddr_storage addr;                                               \
   unsigned int nbufs;                                                         \
   uv_buf_t* bufs;                                                             \
   ssize_t status;                                                             \
diff --git a/deps/uv/include/uv-version.h b/deps/uv/include/uv-version.h
index 6f8e080a46..d33c8f8bde 100644
--- a/deps/uv/include/uv-version.h
+++ b/deps/uv/include/uv-version.h
@@ -32,7 +32,7 @@
 
 #define UV_VERSION_MAJOR 0
 #define UV_VERSION_MINOR 11
-#define UV_VERSION_PATCH 26
+#define UV_VERSION_PATCH 28
 #define UV_VERSION_IS_RELEASE 1
 
 #endif /* UV_VERSION_H */
diff --git a/deps/uv/include/uv-win.h b/deps/uv/include/uv-win.h
index 2f24dfe890..136b0b45de 100644
--- a/deps/uv/include/uv-win.h
+++ b/deps/uv/include/uv-win.h
@@ -30,6 +30,15 @@ typedef intptr_t ssize_t;
 #endif
 
 #include <winsock2.h>
+
+#if defined(__MINGW32__) && !defined(__MINGW64_VERSION_MAJOR)
+typedef struct pollfd {
+  SOCKET fd;
+  short  events;
+  short  revents;
+} WSAPOLLFD, *PWSAPOLLFD, *LPWSAPOLLFD;
+#endif
+
 #include <mswsock.h>
 #include <ws2tcpip.h>
 #include <windows.h>
@@ -45,6 +54,7 @@ typedef intptr_t ssize_t;
 #endif
 
 #include "tree.h"
+#include "uv-threadpool.h"
 
 #define MAX_PIPENAME_LEN 256
 
@@ -307,7 +317,11 @@ RB_HEAD(uv_timer_tree_s, uv_timer_s);
   /* Counter to keep track of active udp streams */                           \
   unsigned int active_udp_streams;                                            \
   /* Counter to started timer */                                              \
-  uint64_t timer_counter;
+  uint64_t timer_counter;                                                     \
+  /* Threadpool */                                                            \
+  void* wq[2];                                                                \
+  uv_mutex_t wq_mutex;                                                        \
+  uv_async_t wq_async;
 
 #define UV_REQ_TYPE_PRIVATE                                                   \
   /* TODO: remove the req suffix */                                           \
@@ -395,7 +409,7 @@ RB_HEAD(uv_timer_tree_s, uv_timer_s);
 
 #define UV_TCP_PRIVATE_FIELDS                                                 \
   SOCKET socket;                                                              \
-  int bind_error;                                                             \
+  int delayed_error;                                                          \
   union {                                                                     \
     struct { uv_tcp_server_fields };                                          \
     struct { uv_tcp_connection_fields };                                      \
@@ -520,6 +534,7 @@ RB_HEAD(uv_timer_tree_s, uv_timer_s);
   unsigned int flags;
 
 #define UV_GETADDRINFO_PRIVATE_FIELDS                                         \
+  struct uv__work work_req;                                                   \
   uv_getaddrinfo_cb getaddrinfo_cb;                                           \
   void* alloc;                                                                \
   WCHAR* node;                                                                \
@@ -529,6 +544,7 @@ RB_HEAD(uv_timer_tree_s, uv_timer_s);
   int retcode;
 
 #define UV_GETNAMEINFO_PRIVATE_FIELDS                                         \
+  struct uv__work work_req;                                                   \
   uv_getnameinfo_cb getnameinfo_cb;                                           \
   struct sockaddr_storage storage;                                            \
   int flags;                                                                  \
@@ -547,6 +563,7 @@ RB_HEAD(uv_timer_tree_s, uv_timer_s);
   volatile char exit_cb_pending;
 
 #define UV_FS_PRIVATE_FIELDS                                                  \
+  struct uv__work work_req;                                                   \
   int flags;                                                                  \
   DWORD sys_errno_;                                                           \
   union {                                                                     \
@@ -572,6 +589,7 @@ RB_HEAD(uv_timer_tree_s, uv_timer_s);
   };
 
 #define UV_WORK_PRIVATE_FIELDS                                                \
+  struct uv__work work_req;
 
 #define UV_FS_EVENT_PRIVATE_FIELDS                                            \
   struct uv_fs_event_req_s {                                                  \
diff --git a/deps/uv/include/uv.h b/deps/uv/include/uv.h
index ef2f840d76..df6d9549c1 100644
--- a/deps/uv/include/uv.h
+++ b/deps/uv/include/uv.h
@@ -258,7 +258,8 @@ UV_EXTERN const char* uv_version_string(void);
  */
 
 /*
- * Returns the default loop.
+ * Returns the initialized default loop. It may return NULL in case of
+ * allocation failture.
  */
 UV_EXTERN uv_loop_t* uv_default_loop(void);
 
@@ -276,20 +277,24 @@ UV_EXTERN int uv_loop_close(uv_loop_t* loop);
 
 /*
  * Allocates and initializes a new loop.
- * NOTE: This function is DEPRECATED (to be removed after 0.12), users should
- * allocate the loop manually and use uv_loop_init instead.
+ *
+ * NOTE:
+ *  This function is DEPRECATED (to be removed after 0.12), users should
+ *  allocate the loop manually and use uv_loop_init instead.
  */
 UV_EXTERN uv_loop_t* uv_loop_new(void);
 
 /*
  * Cleans up a loop once it has finished executio and frees its memory.
- * NOTE: This function is DEPRECATED (to be removed after 0.12). Users should use
- * uv_loop_close and free the memory manually instead.
+ *
+ * NOTE:
+ *  This function is DEPRECATED (to be removed after 0.12). Users should use
+ *  uv_loop_close and free the memory manually instead.
  */
 UV_EXTERN void uv_loop_delete(uv_loop_t*);
 
 /*
- * Returns size of the loop struct, useful for dynamic lookup with FFI
+ * Returns size of the loop struct, useful for dynamic lookup with FFI.
  */
 UV_EXTERN size_t uv_loop_size(void);
 
@@ -316,10 +321,10 @@ UV_EXTERN int uv_run(uv_loop_t*, uv_run_mode mode);
 UV_EXTERN int uv_loop_alive(const uv_loop_t* loop);
 
 /*
- * This function will stop the event loop by forcing uv_run to end
- * as soon as possible, but not sooner than the next loop iteration.
- * If this function was called before blocking for i/o, the loop won't
- * block for i/o on this iteration.
+ * This function will stop the event loop by forcing uv_run to end as soon as
+ * possible, but not sooner than the next loop iteration.
+ * If this function was called before blocking for i/o, the loop won't block
+ * for i/o on this iteration.
  */
 UV_EXTERN void uv_stop(uv_loop_t*);
 
@@ -398,12 +403,12 @@ typedef void (*uv_alloc_cb)(uv_handle_t* handle,
  * `nread` is > 0 if there is data available, 0 if libuv is done reading for
  * now, or < 0 on error.
  *
- * The callee is responsible for closing the stream when an error happens.
- * Trying to read from the stream again is undefined.
+ * The callee is responsible for closing the stream when an error happens
+ * by calling uv_close(). Trying to read from the stream again is undefined.
  *
  * The callee is responsible for freeing the buffer, libuv does not reuse it.
  * The buffer may be a null buffer (where buf->base=NULL and buf->len=0) on
- * EOF or error.
+ * error.
  */
 typedef void (*uv_read_cb)(uv_stream_t* stream,
                            ssize_t nread,
@@ -505,17 +510,17 @@ struct uv_req_s {
 };
 
 
-/* Platform-specific request types */
+/* Platform-specific request types. */
 UV_PRIVATE_REQ_TYPES
 
 
 /*
- * uv_shutdown_t is a subclass of uv_req_t
+ * uv_shutdown_t is a subclass of uv_req_t.
  *
- * Shutdown the outgoing (write) side of a duplex stream. It waits for
- * pending write requests to complete. The handle should refer to a
- * initialized stream. req should be an uninitialized shutdown request
- * struct. The cb is called after shutdown is complete.
+ * Shutdown the outgoing (write) side of a duplex stream. It waits for pending
+ * write requests to complete. The handle should refer to a initialized stream.
+ * req should be an uninitialized shutdown request struct. The cb is called
+ * after shutdown is complete.
  */
 UV_EXTERN int uv_shutdown(uv_shutdown_t* req,
                           uv_stream_t* handle,
@@ -540,20 +545,19 @@ struct uv_shutdown_s {
   void* handle_queue[2];                                                      \
   UV_HANDLE_PRIVATE_FIELDS                                                    \
 
-/* The abstract base class of all handles.  */
+/* The abstract base class of all handles. */
 struct uv_handle_s {
   UV_HANDLE_FIELDS
 };
 
 /*
- * Returns size of various handle types, useful for FFI
- * bindings to allocate correct memory without copying struct
- * definitions
+ * Returns size of various handle types, useful for FFI bindings to allocate
+ * correct memory without copying struct definitions.
  */
 UV_EXTERN size_t uv_handle_size(uv_handle_type type);
 
 /*
- * Returns size of request types, useful for dynamic lookup with FFI
+ * Returns size of request types, useful for dynamic lookup with FFI.
  */
 UV_EXTERN size_t uv_req_size(uv_req_type type);
 
@@ -566,7 +570,7 @@ UV_EXTERN size_t uv_req_size(uv_req_type type);
  *    by closing it with uv_close().
  *
  *  - A uv_pipe_t, uv_tcp_t, uv_udp_t, etc. handle - basically any handle that
- *    deals with I/O - is active when it is doing something that involves I/O,
+ *    deals with i/o - is active when it is doing something that involves i/o,
  *    like reading, writing, connecting, accepting new connections, etc.
  *
  *  - A uv_check_t, uv_idle_t, uv_timer_t, etc. handle is active when it has
@@ -601,6 +605,7 @@ UV_EXTERN void uv_close(uv_handle_t* handle, uv_close_cb close_cb);
 
 /*
  * Constructor for uv_buf_t.
+ *
  * Due to platform differences the user cannot rely on the ordering of the
  * base and len members of the uv_buf_t struct. The user is responsible for
  * freeing base after the uv_buf_t is done. Return struct passed by value.
@@ -617,7 +622,7 @@ UV_EXTERN uv_buf_t uv_buf_init(char* base, unsigned int len);
   UV_STREAM_PRIVATE_FIELDS
 
 /*
- * uv_stream_t is a subclass of uv_handle_t
+ * uv_stream_t is a subclass of uv_handle_t.
  *
  * uv_stream is an abstract class.
  *
@@ -636,16 +641,16 @@ UV_EXTERN int uv_listen(uv_stream_t* stream, int backlog, uv_connection_cb cb);
  * the connection. Before calling uv_accept use uv_*_init() must be
  * called on the client. Non-zero return value indicates an error.
  *
- * When the uv_connection_cb is called it is guaranteed that uv_accept will
+ * When the uv_connection_cb is called it is guaranteed that uv_accept() will
  * complete successfully the first time. If you attempt to use it more than
- * once, it may fail. It is suggested to only call uv_accept once per
+ * once, it may fail. It is suggested to only call uv_accept() once per
  * uv_connection_cb call.
  */
 UV_EXTERN int uv_accept(uv_stream_t* server, uv_stream_t* client);
 
 /*
  * Read data from an incoming stream. The callback will be made several
- * times until there is no more data to read or uv_read_stop is called.
+ * times until there is no more data to read or uv_read_stop() is called.
  * When we've reached EOF nread will be set to UV_EOF.
  *
  * When nread < 0, the buf parameter might not point to a valid buffer;
@@ -704,17 +709,19 @@ UV_EXTERN int uv_write2(uv_write_t* req,
                         uv_write_cb cb);
 
 /*
- * Same as `uv_write()`, but won't queue write request if it can't be completed
+ * Same as uv_write(), but won't queue write request if it can't be completed
  * immediately.
+ *
  * Will return either:
- * - >= 0: number of bytes written (can be less than the supplied buffer size)
- * - < 0: negative error code
+ * - > 0: number of bytes written (can be less than the supplied buffer size).
+ * - < 0: negative error code (UV_EAGAIN is returned if no data can be sent
+ *        immediately).
  */
 UV_EXTERN int uv_try_write(uv_stream_t* handle,
                            const uv_buf_t bufs[],
                            unsigned int nbufs);
 
-/* uv_write_t is a subclass of uv_req_t */
+/* uv_write_t is a subclass of uv_req_t. */
 struct uv_write_s {
   UV_REQ_FIELDS
   uv_write_cb cb;
@@ -755,15 +762,14 @@ UV_EXTERN int uv_stream_set_blocking(uv_stream_t* handle, int blocking);
 /*
  * Used to determine whether a stream is closing or closed.
  *
- * N.B. is only valid between the initialization of the handle
- *      and the arrival of the close callback, and cannot be used
- *      to validate the handle.
+ * N.B. is only valid between the initialization of the handle and the arrival
+ *      of the close callback, and cannot be used to validate the handle.
  */
 UV_EXTERN int uv_is_closing(const uv_handle_t* handle);
 
 
 /*
- * uv_tcp_t is a subclass of uv_stream_t
+ * uv_tcp_t is a subclass of uv_stream_t.
  *
  * Represents a TCP stream or TCP server.
  */
@@ -795,15 +801,16 @@ UV_EXTERN int uv_tcp_keepalive(uv_tcp_t* handle,
 /*
  * Enable/disable simultaneous asynchronous accept requests that are
  * queued by the operating system when listening for new tcp connections.
+ *
  * This setting is used to tune a tcp server for the desired performance.
- * Having simultaneous accepts can significantly improve the rate of
- * accepting connections (which is why it is enabled by default) but
- * may lead to uneven load distribution in multi-process setups.
+ * Having simultaneous accepts can significantly improve the rate of accepting
+ * connections (which is why it is enabled by default) but may lead to uneven
+ * load distribution in multi-process setups.
  */
 UV_EXTERN int uv_tcp_simultaneous_accepts(uv_tcp_t* handle, int enable);
 
 enum uv_tcp_flags {
-  /* Used with uv_tcp_bind, when an IPv6 address is used */
+  /* Used with uv_tcp_bind, when an IPv6 address is used. */
   UV_TCP_IPV6ONLY = 1
 };
 
@@ -811,11 +818,11 @@ enum uv_tcp_flags {
  * Bind the handle to an address and port.  `addr` should point to an
  * initialized struct sockaddr_in or struct sockaddr_in6.
  *
- * When the port is already taken, you can expect to see an UV_EADDRINUSE
- * error from either uv_tcp_bind(), uv_listen() or uv_tcp_connect().
+ * When the port is already taken, you can expect to see an UV_EADDRINUSE error
+ * from either uv_tcp_bind(), uv_listen() or uv_tcp_connect().
  *
- * That is, a successful call to uv_tcp_bind() does not guarantee that
- * the call to uv_listen() or uv_tcp_connect() will succeed as well.
+ * That is, a successful call to uv_tcp_bind() does not guarantee that the call
+ * to uv_listen() or uv_tcp_connect() will succeed as well.
  */
 UV_EXTERN int uv_tcp_bind(uv_tcp_t* handle,
                           const struct sockaddr* addr,
@@ -829,7 +836,7 @@ UV_EXTERN int uv_tcp_getpeername(const uv_tcp_t* handle,
 
 /*
  * Establish an IPv4 or IPv6 TCP connection.  Provide an initialized TCP handle
- * and an uninitialized uv_connect_t*.  `addr` should point to an initialized
+ * and an uninitialized uv_connect_t*. `addr` should point to an initialized
  * struct sockaddr_in or struct sockaddr_in6.
  *
  * The callback is made when the connection has been established or when a
@@ -840,7 +847,7 @@ UV_EXTERN int uv_tcp_connect(uv_connect_t* req,
                              const struct sockaddr* addr,
                              uv_connect_cb cb);
 
-/* uv_connect_t is a subclass of uv_req_t */
+/* uv_connect_t is a subclass of uv_req_t. */
 struct uv_connect_s {
   UV_REQ_FIELDS
   uv_connect_cb cb;
@@ -861,9 +868,10 @@ enum uv_udp_flags {
    * remainder was discarded by the OS. Used in uv_udp_recv_cb.
    */
   UV_UDP_PARTIAL = 2,
-  /* Indicates if SO_REUSEADDR will be set when binding the handle.
+  /*
+   * Indicates if SO_REUSEADDR will be set when binding the handle.
    * This sets the SO_REUSEPORT socket flag on the BSDs and OS X. On other
-   * UNIX platforms, it sets the SO_REUSEADDR flag.  What that means is that
+   * Unix platforms, it sets the SO_REUSEADDR flag.  What that means is that
    * multiple threads or processes can bind to the same address without error
    * (provided they all set the flag) but only the last one to bind will receive
    * any traffic, in effect "stealing" the port from the previous listener.
@@ -872,8 +880,7 @@ enum uv_udp_flags {
 };
 
 /*
- * Called after uv_udp_send(). status 0 indicates
- * success otherwise error.
+ * Called after uv_udp_send(). status 0 indicates success otherwise error.
  */
 typedef void (*uv_udp_send_cb)(uv_udp_send_t* req, int status);
 
@@ -882,14 +889,20 @@ typedef void (*uv_udp_send_cb)(uv_udp_send_t* req, int status);
  *
  *  handle  UDP handle.
  *  nread   Number of bytes that have been received.
- *          0 if there is no more data to read. You may
- *          discard or repurpose the read buffer.
- *          < 0 if a transmission error was detected.
+ *          - 0 if there is no more data to read. You may discard or repurpose
+ *            the read buffer. Note that 0 may also mean that an empty datagram
+ *            was received (in this case `addr` is not NULL).
+ *          - < 0 if a transmission error was detected.
  *  buf     uv_buf_t with the received data.
- *  addr    struct sockaddr* containing the address of the sender.
- *          Can be NULL. Valid for the duration of the callback only.
- *  flags   One or more OR'ed UV_UDP_* constants.
- *          Right now only UV_UDP_PARTIAL is used.
+ *  addr    struct sockaddr* containing the address of the sender. Can be NULL.
+ *          Valid for the duration of the callback only.
+ *  flags   One or more OR'ed UV_UDP_* constants. Right now only UV_UDP_PARTIAL
+ *          is used.
+ *
+ * NOTE:
+ *  The receive callback will be called with nread == 0 and addr == NULL when
+ *  there is nothing to read, and with nread == 0 and addr != NULL when an empty
+ *  UDP packet is received.
  */
 typedef void (*uv_udp_recv_cb)(uv_udp_t* handle,
                                ssize_t nread,
@@ -897,13 +910,23 @@ typedef void (*uv_udp_recv_cb)(uv_udp_t* handle,
                                const struct sockaddr* addr,
                                unsigned flags);
 
-/* uv_udp_t is a subclass of uv_handle_t */
+/* uv_udp_t is a subclass of uv_handle_t. */
 struct uv_udp_s {
   UV_HANDLE_FIELDS
+  /* read-only */
+  /*
+   * Number of bytes queued for sending. This field strictly shows how much
+   * information is currently queued.
+   */
+  size_t send_queue_size;
+  /*
+   * Number of send requests currently in the queue awaiting to be processed.
+   */
+  size_t send_queue_count;
   UV_UDP_PRIVATE_FIELDS
 };
 
-/* uv_udp_send_t is a subclass of uv_req_t */
+/* uv_udp_send_t is a subclass of uv_req_t. */
 struct uv_udp_send_s {
   UV_REQ_FIELDS
   uv_udp_t* handle;
@@ -921,16 +944,16 @@ UV_EXTERN int uv_udp_init(uv_loop_t*, uv_udp_t* handle);
  * Opens an existing file descriptor or SOCKET as a udp handle.
  *
  * Unix only:
- *  The only requirement of the sock argument is that it follows the
- *  datagram contract (works in unconnected mode, supports sendmsg()/recvmsg(),
- *  etc.). In other words, other datagram-type sockets like raw sockets or
- *  netlink sockets can also be passed to this function.
- *
- * This sets the SO_REUSEPORT socket flag on the BSDs and OS X. On other
- * UNIX platforms, it sets the SO_REUSEADDR flag.  What that means is that
- * multiple threads or processes can bind to the same address without error
- * (provided they all set the flag) but only the last one to bind will receive
- * any traffic, in effect "stealing" the port from the previous listener.
+ *  The only requirement of the sock argument is that it follows the datagram
+ *  contract (works in unconnected mode, supports sendmsg()/recvmsg(), etc).
+ *  In other words, other datagram-type sockets like raw sockets or netlink
+ *  sockets can also be passed to this function.
+ *
+ * This sets the SO_REUSEPORT socket flag on the BSDs and OS X. On other Unix
+ * platforms, it sets the SO_REUSEADDR flag.  What that means is that multiple
+ * threads or processes can bind to the same address without error (provided
+ * they all set the flag) but only the last one to bind will receive any
+ * traffic, in effect "stealing" the port from the previous listener.
  * This behavior is something of an anomaly and may be replaced by an explicit
  * opt-in mechanism in future versions of libuv.
  */
@@ -940,7 +963,7 @@ UV_EXTERN int uv_udp_open(uv_udp_t* handle, uv_os_sock_t sock);
  * Bind to an IP address and port.
  *
  * Arguments:
- *  handle    UDP handle. Should have been initialized with `uv_udp_init`.
+ *  handle    UDP handle. Should have been initialized with uv_udp_init().
  *  addr      struct sockaddr_in or struct sockaddr_in6 with the address and
  *            port to bind to.
  *  flags     Indicate how the socket will be bound, UV_UDP_IPV6ONLY and
@@ -953,7 +976,7 @@ UV_EXTERN int uv_udp_bind(uv_udp_t* handle,
                           const struct sockaddr* addr,
                           unsigned int flags);
 
-UV_EXTERN int uv_udp_getsockname(uv_udp_t* handle,
+UV_EXTERN int uv_udp_getsockname(const uv_udp_t* handle,
                                  struct sockaddr* name,
                                  int* namelen);
 
@@ -962,10 +985,10 @@ UV_EXTERN int uv_udp_getsockname(uv_udp_t* handle,
  *
  * Arguments:
  *  handle              UDP handle. Should have been initialized with
- *                      `uv_udp_init`.
- *  multicast_addr      multicast address to set membership for
- *  interface_addr      interface address
- *  membership          Should be UV_JOIN_GROUP or UV_LEAVE_GROUP
+ *                      uv_udp_init().
+ *  multicast_addr      multicast address to set membership for.
+ *  interface_addr      interface address.
+ *  membership          Should be UV_JOIN_GROUP or UV_LEAVE_GROUP.
  *
  * Returns:
  *  0 on success, or an error code < 0 on failure.
@@ -981,8 +1004,8 @@ UV_EXTERN int uv_udp_set_membership(uv_udp_t* handle,
  *
  * Arguments:
  *  handle              UDP handle. Should have been initialized with
- *                      `uv_udp_init`.
- *  on                  1 for on, 0 for off
+ *                      uv_udp_init().
+ *  on                  1 for on, 0 for off.
  *
  * Returns:
  *  0 on success, or an error code < 0 on failure.
@@ -990,12 +1013,12 @@ UV_EXTERN int uv_udp_set_membership(uv_udp_t* handle,
 UV_EXTERN int uv_udp_set_multicast_loop(uv_udp_t* handle, int on);
 
 /*
- * Set the multicast ttl
+ * Set the multicast ttl.
  *
  * Arguments:
  *  handle              UDP handle. Should have been initialized with
- *                      `uv_udp_init`.
- *  ttl                 1 through 255
+ *                      uv_udp_init().
+ *  ttl                 1 through 255.
  *
  * Returns:
  *  0 on success, or an error code < 0 on failure.
@@ -1004,12 +1027,12 @@ UV_EXTERN int uv_udp_set_multicast_ttl(uv_udp_t* handle, int ttl);
 
 
 /*
- * Set the multicast interface to send on
+ * Set the multicast interface to send on.
  *
  * Arguments:
  *  handle              UDP handle. Should have been initialized with
- *                      `uv_udp_init`.
- *  interface_addr      interface address
+ *                      uv_udp_init().
+ *  interface_addr      interface address.
  *
  * Returns:
  *  0 on success, or an error code < 0 on failure.
@@ -1018,12 +1041,12 @@ UV_EXTERN int uv_udp_set_multicast_interface(uv_udp_t* handle,
                                              const char* interface_addr);
 
 /*
- * Set broadcast on or off
+ * Set broadcast on or off.
  *
  * Arguments:
  *  handle              UDP handle. Should have been initialized with
- *                      `uv_udp_init`.
- *  on                  1 for on, 0 for off
+ *                      uv_udp_init().
+ *  on                  1 for on, 0 for off.
  *
  * Returns:
  *  0 on success, or an error code < 0 on failure.
@@ -1031,12 +1054,12 @@ UV_EXTERN int uv_udp_set_multicast_interface(uv_udp_t* handle,
 UV_EXTERN int uv_udp_set_broadcast(uv_udp_t* handle, int on);
 
 /*
- * Set the time to live
+ * Set the time to live.
  *
  * Arguments:
  *  handle              UDP handle. Should have been initialized with
- *                      `uv_udp_init`.
- *  ttl                 1 through 255
+ *                      uv_udp_init().
+ *  ttl                 1 through 255.
  *
  * Returns:
  *  0 on success, or an error code < 0 on failure.
@@ -1044,13 +1067,12 @@ UV_EXTERN int uv_udp_set_broadcast(uv_udp_t* handle, int on);
 UV_EXTERN int uv_udp_set_ttl(uv_udp_t* handle, int ttl);
 
 /*
- * Send data. If the socket has not previously been bound with `uv_udp_bind,`
- * it is bound to 0.0.0.0 (the "all interfaces" address) and a random
- * port number.
+ * Send data. If the socket has not previously been bound with uv_udp_bind() it
+ * is bound to 0.0.0.0 (the "all interfaces" address) and a random port number.
  *
  * Arguments:
  *  req       UDP request handle. Need not be initialized.
- *  handle    UDP handle. Should have been initialized with `uv_udp_init`.
+ *  handle    UDP handle. Should have been initialized with uv_udp_init().
  *  bufs      List of buffers to send.
  *  nbufs     Number of buffers in `bufs`.
  *  addr      struct sockaddr_in or struct sockaddr_in6 with the address and
@@ -1068,12 +1090,25 @@ UV_EXTERN int uv_udp_send(uv_udp_send_t* req,
                           uv_udp_send_cb send_cb);
 
 /*
- * Receive data. If the socket has not previously been bound with `uv_udp_bind`
- * it is bound to 0.0.0.0 (the "all interfaces" address) and a random
- * port number.
+ * Same as uv_udp_send(), but won't queue a send request if it can't be completed
+ * immediately.
+ *
+ * Will return either:
+ * - >= 0: number of bytes sent (it matches the given buffer size).
+ * - < 0:  negative error code (UV_EAGAIN is returned when the message can't be
+ *         sent immediately).
+ */
+UV_EXTERN int uv_udp_try_send(uv_udp_t* handle,
+                              const uv_buf_t bufs[],
+                              unsigned int nbufs,
+                              const struct sockaddr* addr);
+/*
+ * Receive data. If the socket has not previously been bound with uv_udp_bind()
+ * it is bound to 0.0.0.0 (the "all interfaces" address) and a random port
+ * number.
  *
  * Arguments:
- *  handle    UDP handle. Should have been initialized with `uv_udp_init`.
+ *  handle    UDP handle. Should have been initialized with uv_udp_init().
  *  alloc_cb  Callback to invoke when temporary storage is needed.
  *  recv_cb   Callback to invoke with received data.
  *
@@ -1088,7 +1123,7 @@ UV_EXTERN int uv_udp_recv_start(uv_udp_t* handle,
  * Stop listening for incoming datagrams.
  *
  * Arguments:
- *  handle    UDP handle. Should have been initialized with `uv_udp_init`.
+ *  handle    UDP handle. Should have been initialized with uv_udp_init().
  *
  * Returns:
  *  0 on success, or an error code < 0 on failure.
@@ -1097,7 +1132,7 @@ UV_EXTERN int uv_udp_recv_stop(uv_udp_t* handle);
 
 
 /*
- * uv_tty_t is a subclass of uv_stream_t
+ * uv_tty_t is a subclass of uv_stream_t.
  *
  * Representing a stream for the console.
  */
@@ -1109,12 +1144,12 @@ struct uv_tty_s {
 
 /*
  * Initialize a new TTY stream with the given file descriptor. Usually the
- * file descriptor will be
+ * file descriptor will be:
  *   0 = stdin
  *   1 = stdout
  *   2 = stderr
  * The last argument, readable, specifies if you plan on calling
- * uv_read_start with this stream. stdin is readable, stdout is not.
+ * uv_read_start() with this stream. stdin is readable, stdout is not.
  *
  * TTY streams which are not readable have blocking writes.
  */
@@ -1129,7 +1164,7 @@ UV_EXTERN int uv_tty_set_mode(uv_tty_t*, int mode);
  * To be called when the program exits. Resets TTY settings to default
  * values for the next process to take over.
  *
- * This function is async signal-safe on UNIX platforms but can fail with error
+ * This function is async signal-safe on Unix platforms but can fail with error
  * code UV_EBUSY if you call it when execution is inside uv_tty_set_mode().
  */
 UV_EXTERN int uv_tty_reset_mode(void);
@@ -1143,15 +1178,16 @@ UV_EXTERN int uv_tty_get_winsize(uv_tty_t*, int* width, int* height);
  * Used to detect what type of stream should be used with a given file
  * descriptor. Usually this will be used during initialization to guess the
  * type of the stdio streams.
+ *
  * For isatty() functionality use this function and test for UV_TTY.
  */
 UV_EXTERN uv_handle_type uv_guess_handle(uv_file file);
 
 /*
- * uv_pipe_t is a subclass of uv_stream_t
+ * uv_pipe_t is a subclass of uv_stream_t.
  *
  * Representing a pipe stream or pipe server. On Windows this is a Named
- * Pipe. On Unix this is a UNIX domain socket.
+ * Pipe. On Unix this is a Unix domain socket.
  */
 struct uv_pipe_s {
   UV_HANDLE_FIELDS
@@ -1172,17 +1208,17 @@ UV_EXTERN int uv_pipe_init(uv_loop_t*, uv_pipe_t* handle, int ipc);
 UV_EXTERN int uv_pipe_open(uv_pipe_t*, uv_file file);
 
 /*
- * Bind the pipe to a file path (UNIX) or a name (Windows.)
+ * Bind the pipe to a file path (Unix) or a name (Windows).
  *
- * Paths on UNIX get truncated to `sizeof(sockaddr_un.sun_path)` bytes,
+ * Paths on Unix get truncated to `sizeof(sockaddr_un.sun_path)` bytes,
  * typically between 92 and 108 bytes.
  */
 UV_EXTERN int uv_pipe_bind(uv_pipe_t* handle, const char* name);
 
 /*
- * Connect to the UNIX domain socket or the named pipe.
+ * Connect to the Unix domain socket or the named pipe.
  *
- * Paths on UNIX get truncated to `sizeof(sockaddr_un.sun_path)` bytes,
+ * Paths on Unix get truncated to `sizeof(sockaddr_un.sun_path)` bytes,
  * typically between 92 and 108 bytes.
  */
 UV_EXTERN void uv_pipe_connect(uv_connect_t* req,
@@ -1191,12 +1227,12 @@ UV_EXTERN void uv_pipe_connect(uv_connect_t* req,
                                uv_connect_cb cb);
 
 /*
- * Get the name of the UNIX domain socket or the named pipe.
+ * Get the name of the Unix domain socket or the named pipe.
  *
- * A preallocated buffer must be provided. The len parameter holds the
- * length of the buffer and it's set to the number of bytes written to the
- * buffer on output. If the buffer is not big enough UV_ENOBUFS will be
- * returned and len will contain the required size.
+ * A preallocated buffer must be provided. The len parameter holds the length
+ * of the buffer and it's set to the number of bytes written to the buffer on
+ * output. If the buffer is not big enough UV_ENOBUFS will be returned and len
+ * will contain the required size.
  */
 UV_EXTERN int uv_pipe_getsockname(const uv_pipe_t* handle,
                                   char* buf,
@@ -1204,17 +1240,18 @@ UV_EXTERN int uv_pipe_getsockname(const uv_pipe_t* handle,
 
 /*
  * This setting applies to Windows only.
- * Set the number of pending pipe instance handles when the pipe server
- * is waiting for connections.
+ *
+ * Set the number of pending pipe instance handles when the pipe server is
+ * waiting for connections.
  */
 UV_EXTERN void uv_pipe_pending_instances(uv_pipe_t* handle, int count);
 
 /*
  * Used to receive handles over ipc pipes.
  *
- * First - call `uv_pipe_pending_count`, if it is > 0 - initialize handle
- * using type, returned by `uv_pipe_pending_type` and call
- * `uv_accept(pipe, handle)`.
+ * First - call uv_pipe_pending_count(), if it is > 0 - initialize handle
+ * using type, returned by uv_pipe_pending_type() and call
+ * uv_accept(pipe, handle).
  */
 UV_EXTERN int uv_pipe_pending_count(uv_pipe_t* handle);
 UV_EXTERN uv_handle_type uv_pipe_pending_type(uv_pipe_t* handle);
@@ -1227,10 +1264,10 @@ UV_EXTERN uv_handle_type uv_pipe_pending_type(uv_pipe_t* handle);
  *
  * The purpose of uv_poll is to enable integrating external libraries that
  * rely on the event loop to signal it about the socket status changes, like
- * c-ares or libssh2. Using uv_poll_t for any other other purpose is not
- * recommended; uv_tcp_t, uv_udp_t, etc. provide an implementation that is
- * much faster and more scalable than what can be achieved with uv_poll_t,
- * especially on Windows.
+ * c-ares or libssh2. Using uv_poll_t for any other purpose is not recommended;
+ * uv_tcp_t, uv_udp_t, etc. provide an implementation that is much faster and
+ * more scalable than what can be achieved with uv_poll_t, especially on
+ * Windows.
  *
  * It is possible that uv_poll occasionally signals that a file descriptor is
  * readable or writable even when it isn't. The user should therefore always
@@ -1245,7 +1282,7 @@ UV_EXTERN uv_handle_type uv_pipe_pending_type(uv_pipe_t* handle);
  * but it might also start polling another socket. However the fd can be safely
  * closed immediately after a call to uv_poll_stop() or uv_close().
  *
- * On windows only sockets can be polled with uv_poll. On unix any file
+ * On windows only sockets can be polled with uv_poll. On Unix any file
  * descriptor that would be accepted by poll(2) can be used with uv_poll.
  */
 struct uv_poll_s {
@@ -1262,8 +1299,10 @@ enum uv_poll_event {
 /* Initialize the poll watcher using a file descriptor. */
 UV_EXTERN int uv_poll_init(uv_loop_t* loop, uv_poll_t* handle, int fd);
 
-/* Initialize the poll watcher using a socket descriptor. On unix this is */
-/* identical to uv_poll_init. On windows it takes a SOCKET handle. */
+/*
+ * Initialize the poll watcher using a socket descriptor. On Unix this is
+ * identical to uv_poll_init. On windows it takes a SOCKET handle.
+ */
 UV_EXTERN int uv_poll_init_socket(uv_loop_t* loop,
                                   uv_poll_t* handle,
                                   uv_os_sock_t socket);
@@ -1347,11 +1386,15 @@ UV_EXTERN int uv_idle_stop(uv_idle_t* idle);
 /*
  * uv_async_t is a subclass of uv_handle_t.
  *
- * uv_async_send wakes up the event loop and calls the async handle's callback.
- * There is no guarantee that every uv_async_send call leads to exactly one
- * invocation of the callback; the only guarantee is that the callback function
- * is called at least once after the call to async_send. Unlike all other
- * libuv functions, uv_async_send can be called from another thread.
+ * uv_async_send() wakes up the event loop and calls the async handle's callback.
+ *
+ * Unlike all other libuv functions, uv_async_send() can be called from another
+ * thread.
+ *
+ * NOTE:
+ *  There is no guarantee that every uv_async_send() call leads to exactly one
+ *  invocation of the callback; the only guarantee is that the callback
+ *  function is called at least once after the call to async_send.
  */
 struct uv_async_s {
   UV_HANDLE_FIELDS
@@ -1420,7 +1463,7 @@ UV_EXTERN uint64_t uv_timer_get_repeat(const uv_timer_t* handle);
 
 
 /*
- * uv_getaddrinfo_t is a subclass of uv_req_t
+ * uv_getaddrinfo_t is a subclass of uv_req_t.
  *
  * Request object for uv_getaddrinfo.
  */
@@ -1464,7 +1507,7 @@ UV_EXTERN void uv_freeaddrinfo(struct addrinfo* ai);
 
 
 /*
-* uv_getnameinfo_t is a subclass of uv_req_t
+* uv_getnameinfo_t is a subclass of uv_req_t.
 *
 * Request object for uv_getnameinfo.
 */
@@ -1490,14 +1533,15 @@ UV_EXTERN int uv_getnameinfo(uv_loop_t* loop,
                              int flags);
 
 
-/* uv_spawn() options */
+/* uv_spawn() options. */
 typedef enum {
   UV_IGNORE         = 0x00,
   UV_CREATE_PIPE    = 0x01,
   UV_INHERIT_FD     = 0x02,
   UV_INHERIT_STREAM = 0x04,
 
-  /* When UV_CREATE_PIPE is specified, UV_READABLE_PIPE and UV_WRITABLE_PIPE
+  /*
+   * When UV_CREATE_PIPE is specified, UV_READABLE_PIPE and UV_WRITABLE_PIPE
    * determine the direction of flow, from the child process' perspective. Both
    * flags may be specified to create a duplex data stream.
    */
@@ -1578,7 +1622,7 @@ enum uv_process_flags {
   /*
    * Do not wrap any arguments in quotes, or perform any other escaping, when
    * converting the argument list into a command line string. This option is
-   * only meaningful on Windows systems. On unix it is silently ignored.
+   * only meaningful on Windows systems. On Unix it is silently ignored.
    */
   UV_PROCESS_WINDOWS_VERBATIM_ARGUMENTS = (1 << 2),
   /*
@@ -1591,14 +1635,14 @@ enum uv_process_flags {
   UV_PROCESS_DETACHED = (1 << 3),
   /*
    * Hide the subprocess console window that would normally be created. This
-   * option is only meaningful on Windows systems. On unix it is silently
+   * option is only meaningful on Windows systems. On Unix it is silently
    * ignored.
    */
   UV_PROCESS_WINDOWS_HIDE = (1 << 4)
 };
 
 /*
- * uv_process_t is a subclass of uv_handle_t
+ * uv_process_t is a subclass of uv_handle_t.
  */
 struct uv_process_s {
   UV_HANDLE_FIELDS
@@ -1625,7 +1669,7 @@ UV_EXTERN int uv_spawn(uv_loop_t* loop,
 
 /*
  * Kills the process with the specified signal. The user must still
- * call uv_close on the process.
+ * call uv_close() on the process.
  *
  * Emulates some aspects of Unix exit status on Windows, in that while the
  * underlying process will be terminated with a status of `1`,
@@ -1651,7 +1695,7 @@ UV_EXTERN int uv_kill(int pid, int signum);
 
 
 /*
- * uv_work_t is a subclass of uv_req_t
+ * uv_work_t is a subclass of uv_req_t.
  */
 struct uv_work_s {
   UV_REQ_FIELDS
@@ -1686,7 +1730,7 @@ UV_EXTERN int uv_queue_work(uv_loop_t* loop,
  * - A uv_work_t or uv_getaddrinfo_t request has its callback invoked with
  *   status == UV_ECANCELED.
  *
- * This function is currently only implemented on UNIX platforms. On Windows,
+ * This function is currently only implemented on Unix platforms. On Windows,
  * it always returns UV_ENOSYS.
  */
 UV_EXTERN int uv_cancel(uv_req_t* req);
@@ -1755,15 +1799,15 @@ typedef struct {
 UV_EXTERN int uv_getrusage(uv_rusage_t* rusage);
 
 /*
- * This allocates cpu_infos array, and sets count.  The array
- * is freed using uv_free_cpu_info().
+ * This allocates cpu_infos array, and sets count. The array is freed
+ * using uv_free_cpu_info().
  */
 UV_EXTERN int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count);
 UV_EXTERN void uv_free_cpu_info(uv_cpu_info_t* cpu_infos, int count);
 
 /*
- * This allocates addresses array, and sets count.  The array
- * is freed using uv_free_interface_addresses().
+ * This allocates addresses array, and sets count. The array is freed
+ * using uv_free_interface_addresses().
  */
 UV_EXTERN int uv_interface_addresses(uv_interface_address_t** addresses,
   int* count);
@@ -1805,6 +1849,7 @@ typedef enum {
   UV_FS_UNLINK,
   UV_FS_RMDIR,
   UV_FS_MKDIR,
+  UV_FS_MKDTEMP,
   UV_FS_RENAME,
   UV_FS_READDIR,
   UV_FS_LINK,
@@ -1814,7 +1859,7 @@ typedef enum {
   UV_FS_FCHOWN
 } uv_fs_type;
 
-/* uv_fs_t is a subclass of uv_req_t */
+/* uv_fs_t is a subclass of uv_req_t. */
 struct uv_fs_s {
   UV_REQ_FIELDS
   uv_fs_type fs_type;
@@ -1823,7 +1868,7 @@ struct uv_fs_s {
   ssize_t result;
   void* ptr;
   const char* path;
-  uv_stat_t statbuf;  /* Stores the result of uv_fs_stat and uv_fs_fstat. */
+  uv_stat_t statbuf;  /* Stores the result of uv_fs_stat() and uv_fs_fstat(). */
   UV_FS_PRIVATE_FIELDS
 };
 
@@ -1847,6 +1892,9 @@ UV_EXTERN int uv_fs_write(uv_loop_t* loop, uv_fs_t* req, uv_file file,
 UV_EXTERN int uv_fs_mkdir(uv_loop_t* loop, uv_fs_t* req, const char* path,
     int mode, uv_fs_cb cb);
 
+UV_EXTERN int uv_fs_mkdtemp(uv_loop_t* loop, uv_fs_t* req, const char* tpl,
+    uv_fs_cb cb);
+
 UV_EXTERN int uv_fs_rmdir(uv_loop_t* loop, uv_fs_t* req, const char* path,
     uv_fs_cb cb);
 
@@ -1890,14 +1938,14 @@ UV_EXTERN int uv_fs_link(uv_loop_t* loop, uv_fs_t* req, const char* path,
     const char* new_path, uv_fs_cb cb);
 
 /*
- * This flag can be used with uv_fs_symlink on Windows
- * to specify whether path argument points to a directory.
+ * This flag can be used with uv_fs_symlink() on Windows to specify whether
+ * path argument points to a directory.
  */
 #define UV_FS_SYMLINK_DIR          0x0001
 
 /*
- * This flag can be used with uv_fs_symlink on Windows
- * to specify whether the symlink is to be created using junction points.
+ * This flag can be used with uv_fs_symlink() on Windows to specify whether
+ * the symlink is to be created using junction points.
  */
 #define UV_FS_SYMLINK_JUNCTION     0x0002
 
@@ -1975,7 +2023,7 @@ UV_EXTERN int uv_fs_poll_getpath(uv_fs_poll_t* handle, char* buf, size_t* len);
 
 
 /*
- * UNIX signal handling on a per-event loop basis. The implementation is not
+ * Unix signal handling on a per-event loop basis. The implementation is not
  * ultra efficient so don't go creating a million event loops with a million
  * signal watchers.
  *
@@ -2030,14 +2078,16 @@ UV_EXTERN int uv_signal_stop(uv_signal_t* handle);
 
 /*
  * Gets load average.
+ *
  * See: http://en.wikipedia.org/wiki/Load_(computing)
+ *
  * Returns [0,0,0] on Windows.
  */
 UV_EXTERN void uv_loadavg(double avg[3]);
 
 
 /*
- * Flags to be passed to uv_fs_event_start.
+ * Flags to be passed to uv_fs_event_start().
  */
 enum uv_fs_event_flags {
   /*
@@ -2088,32 +2138,34 @@ UV_EXTERN int uv_fs_event_getpath(uv_fs_event_t* handle,
                                   size_t* len);
 
 
-/* Utility */
+/* Utilities. */
 
-/* Convert string ip addresses to binary structures */
+/* Convert string ip addresses to binary structures. */
 UV_EXTERN int uv_ip4_addr(const char* ip, int port, struct sockaddr_in* addr);
 UV_EXTERN int uv_ip6_addr(const char* ip, int port, struct sockaddr_in6* addr);
 
-/* Convert binary addresses to strings */
+/* Convert binary addresses to strings. */
 UV_EXTERN int uv_ip4_name(const struct sockaddr_in* src, char* dst, size_t size);
 UV_EXTERN int uv_ip6_name(const struct sockaddr_in6* src, char* dst, size_t size);
 
-/* Cross-platform IPv6-capable implementation of the 'standard' inet_ntop */
-/* and inet_pton functions. On success they return 0. If an error */
-/* the target of the `dst` pointer is unmodified. */
+/*
+ * Cross-platform IPv6-capable implementation of the 'standard' inet_ntop() and
+ * inet_pton() functions. On success they return 0. If an error the target of
+ * the `dst` pointer is unmodified.
+ */
 UV_EXTERN int uv_inet_ntop(int af, const void* src, char* dst, size_t size);
 UV_EXTERN int uv_inet_pton(int af, const char* src, void* dst);
 
-/* Gets the executable path */
+/* Gets the executable path. */
 UV_EXTERN int uv_exepath(char* buffer, size_t* size);
 
-/* Gets the current working directory */
+/* Gets the current working directory. */
 UV_EXTERN int uv_cwd(char* buffer, size_t* size);
 
-/* Changes the current working directory */
+/* Changes the current working directory. */
 UV_EXTERN int uv_chdir(const char* dir);
 
-/* Gets memory info in bytes */
+/* Gets memory info in bytes. */
 UV_EXTERN uint64_t uv_get_free_memory(void);
 UV_EXTERN uint64_t uv_get_total_memory(void);
 
@@ -2139,13 +2191,13 @@ UV_EXTERN extern uint64_t uv_hrtime(void);
  *
  * Note that this function works on a best-effort basis: there is no guarantee
  * that libuv can discover all file descriptors that were inherited. In general
- * it does a better job on Windows than it does on unix.
+ * it does a better job on Windows than it does on Unix.
  */
 UV_EXTERN void uv_disable_stdio_inheritance(void);
 
 /*
  * Opens a shared library. The filename is in utf-8. Returns 0 on success and
- * -1 on error. Call `uv_dlerror(uv_lib_t*)` to get the error message.
+ * -1 on error. Call uv_dlerror(uv_lib_t*) to get the error message.
  */
 UV_EXTERN int uv_dlopen(const char* filename, uv_lib_t* lib);
 
@@ -2166,8 +2218,8 @@ UV_EXTERN int uv_dlsym(uv_lib_t* lib, const char* name, void** ptr);
 UV_EXTERN const char* uv_dlerror(const uv_lib_t* lib);
 
 /*
- * The mutex functions return 0 on success or an error code < 0
- * (unless the return type is void, of course).
+ * The mutex functions return 0 on success or an error code < 0 (unless the
+ * return type is void, of course).
  */
 UV_EXTERN int uv_mutex_init(uv_mutex_t* handle);
 UV_EXTERN void uv_mutex_destroy(uv_mutex_t* handle);
@@ -2216,31 +2268,35 @@ UV_EXTERN int uv_barrier_init(uv_barrier_t* barrier, unsigned int count);
 UV_EXTERN void uv_barrier_destroy(uv_barrier_t* barrier);
 UV_EXTERN int uv_barrier_wait(uv_barrier_t* barrier);
 
-/* Waits on a condition variable without a timeout.
+/*
+ * Waits on a condition variable without a timeout.
  *
- * Note:
- * 1. callers should be prepared to deal with spurious wakeups.
+ * NOTE:
+ *  1. callers should be prepared to deal with spurious wakeups.
  */
 UV_EXTERN void uv_cond_wait(uv_cond_t* cond, uv_mutex_t* mutex);
-/* Waits on a condition variable with a timeout in nano seconds.
+/*
+ * Waits on a condition variable with a timeout in nano seconds.
  * Returns 0 for success or UV_ETIMEDOUT on timeout, It aborts when other
  * errors happen.
  *
- * Note:
- * 1. callers should be prepared to deal with spurious wakeups.
- * 2. the granularity of timeout on Windows is never less than one millisecond.
- * 3. uv_cond_timedwait takes a relative timeout, not an absolute time.
+ * NOTE:
+ *  1. callers should be prepared to deal with spurious wakeups.
+ *  2. the granularity of timeout on Windows is never less than one millisecond.
+ *  3. uv_cond_timedwait() takes a relative timeout, not an absolute time.
  */
 UV_EXTERN int uv_cond_timedwait(uv_cond_t* cond, uv_mutex_t* mutex,
     uint64_t timeout);
 
-/* Runs a function once and only once. Concurrent calls to uv_once() with the
+/*
+ * Runs a function once and only once. Concurrent calls to uv_once() with the
  * same guard will block all callers except one (it's unspecified which one).
  * The guard should be initialized statically with the UV_ONCE_INIT macro.
  */
 UV_EXTERN void uv_once(uv_once_t* guard, void (*callback)(void));
 
-/* Thread-local storage.  These functions largely follow the semantics of
+/*
+ * Thread-local storage.  These functions largely follow the semantics of
  * pthread_key_create(), pthread_key_delete(), pthread_getspecific() and
  * pthread_setspecific().
  *
@@ -2278,11 +2334,11 @@ union uv_any_req {
 struct uv_loop_s {
   /* User data - use this for whatever. */
   void* data;
-  /* Loop reference counting */
+  /* Loop reference counting. */
   unsigned int active_handles;
   void* handle_queue[2];
   void* active_reqs[2];
-  /* Internal flag to signal loop stop */
+  /* Internal flag to signal loop stop. */
   unsigned int stop_flag;
   UV_LOOP_PRIVATE_FIELDS
 };
diff --git a/deps/uv/src/unix/threadpool.c b/deps/uv/src/threadpool.c
index 18687249b1..33890f02b5 100644
--- a/deps/uv/src/unix/threadpool.c
+++ b/deps/uv/src/threadpool.c
@@ -19,7 +19,24 @@
  * IN THE SOFTWARE.
  */
 
-#include "internal.h"
+#include "uv-common.h"
+
+#if !defined(_WIN32)
+# include "unix/internal.h"
+#else
+# include "win/req-inl.h"
+/* TODO(saghul): unify internal req functions */
+static void uv__req_init(uv_loop_t* loop,
+                         uv_req_t* req,
+                         uv_req_type type) {
+  uv_req_init(loop, req);
+  req->type = type;
+  uv__req_register(loop, req);
+}
+# define uv__req_init(loop, req, type) \
+    uv__req_init((loop), (uv_req_t*)(req), (type))
+#endif
+
 #include <stdlib.h>
 
 #define MAX_THREADPOOL_SIZE 128
@@ -91,6 +108,32 @@ static void post(QUEUE* q) {
 }
 
 
+#ifndef _WIN32
+UV_DESTRUCTOR(static void cleanup(void)) {
+  unsigned int i;
+
+  if (initialized == 0)
+    return;
+
+  post(&exit_message);
+
+  for (i = 0; i < nthreads; i++)
+    if (uv_thread_join(threads + i))
+      abort();
+
+  if (threads != default_threads)
+    free(threads);
+
+  uv_mutex_destroy(&mutex);
+  uv_cond_destroy(&cond);
+
+  threads = NULL;
+  nthreads = 0;
+  initialized = 0;
+}
+#endif
+
+
 static void init_once(void) {
   unsigned int i;
   const char* val;
@@ -129,30 +172,6 @@ static void init_once(void) {
 }
 
 
-UV_DESTRUCTOR(static void cleanup(void)) {
-  unsigned int i;
-
-  if (initialized == 0)
-    return;
-
-  post(&exit_message);
-
-  for (i = 0; i < nthreads; i++)
-    if (uv_thread_join(threads + i))
-      abort();
-
-  if (threads != default_threads)
-    free(threads);
-
-  uv_mutex_destroy(&mutex);
-  uv_cond_destroy(&cond);
-
-  threads = NULL;
-  nthreads = 0;
-  initialized = 0;
-}
-
-
 void uv__work_submit(uv_loop_t* loop,
                      struct uv__work* w,
                      void (*work)(struct uv__work* w),
@@ -179,7 +198,7 @@ static int uv__work_cancel(uv_loop_t* loop, uv_req_t* req, struct uv__work* w) {
   uv_mutex_unlock(&mutex);
 
   if (!cancelled)
-    return -EBUSY;
+    return UV_EBUSY;
 
   w->work = uv__cancelled;
   uv_mutex_lock(&loop->wq_mutex);
@@ -213,7 +232,7 @@ void uv__work_done(uv_async_t* handle) {
     QUEUE_REMOVE(q);
 
     w = container_of(q, struct uv__work, wq);
-    err = (w->work == uv__cancelled) ? -ECANCELED : 0;
+    err = (w->work == uv__cancelled) ? UV_ECANCELED : 0;
     w->done(w, err);
   }
 }
@@ -244,7 +263,7 @@ int uv_queue_work(uv_loop_t* loop,
                   uv_work_cb work_cb,
                   uv_after_work_cb after_work_cb) {
   if (work_cb == NULL)
-    return -EINVAL;
+    return UV_EINVAL;
 
   uv__req_init(loop, req, UV_WORK);
   req->loop = loop;
@@ -277,7 +296,7 @@ int uv_cancel(uv_req_t* req) {
     wreq = &((uv_work_t*) req)->work_req;
     break;
   default:
-    return -EINVAL;
+    return UV_EINVAL;
   }
 
   return uv__work_cancel(loop, req, wreq);
diff --git a/deps/uv/src/unix/aix.c b/deps/uv/src/unix/aix.c
index 2521681305..eb90111345 100644
--- a/deps/uv/src/unix/aix.c
+++ b/deps/uv/src/unix/aix.c
@@ -39,12 +39,235 @@
 #include <unistd.h>
 #include <fcntl.h>
 #include <utmp.h>
+#include <libgen.h>
 
 #include <sys/protosw.h>
 #include <libperfstat.h>
 #include <sys/proc.h>
 #include <sys/procfs.h>
 
+#include <sys/poll.h>
+
+#include <sys/pollset.h>
+#include <ctype.h>
+#include <sys/ahafs_evProds.h>
+
+#include <sys/mntctl.h>
+#include <sys/vmount.h>
+#include <limits.h>
+#include <strings.h>
+#include <sys/vnode.h>
+
+#define RDWR_BUF_SIZE   4096
+#define EQ(a,b)         (strcmp(a,b) == 0)
+
+int uv__platform_loop_init(uv_loop_t* loop, int default_loop) {
+  loop->fs_fd = -1;
+
+  /* Passing maxfd of -1 should mean the limit is determined
+   * by the user's ulimit or the global limit as per the doc */
+  loop->backend_fd = pollset_create(-1);
+
+  if (loop->backend_fd == -1)
+    return -1;
+
+  return 0;
+}
+
+
+void uv__platform_loop_delete(uv_loop_t* loop) {
+  if (loop->fs_fd != -1) {
+    uv__close(loop->fs_fd);
+    loop->fs_fd = -1;
+  }
+
+  if (loop->backend_fd != -1) {
+    pollset_destroy(loop->backend_fd);
+    loop->backend_fd = -1;
+  }
+}
+
+
+void uv__io_poll(uv_loop_t* loop, int timeout) {
+  struct pollfd events[1024];
+  struct pollfd pqry;
+  struct pollfd* pe;
+  struct poll_ctl pc;
+  QUEUE* q;
+  uv__io_t* w;
+  uint64_t base;
+  uint64_t diff;
+  int nevents;
+  int count;
+  int nfds;
+  int i;
+  int rc;
+  int add_failed;
+
+  if (loop->nfds == 0) {
+    assert(QUEUE_EMPTY(&loop->watcher_queue));
+    return;
+  }
+
+  while (!QUEUE_EMPTY(&loop->watcher_queue)) {
+    q = QUEUE_HEAD(&loop->watcher_queue);
+    QUEUE_REMOVE(q);
+    QUEUE_INIT(q);
+
+    w = QUEUE_DATA(q, uv__io_t, watcher_queue);
+    assert(w->pevents != 0);
+    assert(w->fd >= 0);
+    assert(w->fd < (int) loop->nwatchers);
+
+    pc.events = w->pevents;
+    pc.fd = w->fd;
+
+    add_failed = 0;
+    if (w->events == 0) {
+      pc.cmd = PS_ADD;
+      if (pollset_ctl(loop->backend_fd, &pc, 1)) {
+        if (errno != EINVAL) {
+          assert(0 && "Failed to add file descriptor (pc.fd) to pollset");
+          abort();
+        }
+        /* Check if the fd is already in the pollset */
+        pqry.fd = pc.fd;
+        rc = pollset_query(loop->backend_fd, &pqry);
+        switch (rc) {
+        case -1: 
+          assert(0 && "Failed to query pollset for file descriptor");
+          abort();
+        case 0:
+          assert(0 && "Pollset does not contain file descriptor");
+          abort();
+        }
+        /* If we got here then the pollset already contained the file descriptor even though
+         * we didn't think it should. This probably shouldn't happen, but we can continue. */
+        add_failed = 1;
+      }
+    }
+    if (w->events != 0 || add_failed) {
+      /* Modify, potentially removing events -- need to delete then add.
+       * Could maybe mod if we knew for sure no events are removed, but
+       * content of w->events is handled above as not reliable (falls back)
+       * so may require a pollset_query() which would have to be pretty cheap
+       * compared to a PS_DELETE to be worth optimising. Alternatively, could
+       * lazily remove events, squelching them in the mean time. */
+      pc.cmd = PS_DELETE;
+      if (pollset_ctl(loop->backend_fd, &pc, 1)) {
+        assert(0 && "Failed to delete file descriptor (pc.fd) from pollset");
+        abort();
+      }
+      pc.cmd = PS_ADD;
+      if (pollset_ctl(loop->backend_fd, &pc, 1)) {
+        assert(0 && "Failed to add file descriptor (pc.fd) to pollset");
+        abort();
+      }
+    }
+
+    w->events = w->pevents;
+  }
+
+  assert(timeout >= -1);
+  base = loop->time;
+  count = 48; /* Benchmarks suggest this gives the best throughput. */
+
+  for (;;) {
+    nfds = pollset_poll(loop->backend_fd,
+                        events,
+                        ARRAY_SIZE(events),
+                        timeout);
+
+    /* Update loop->time unconditionally. It's tempting to skip the update when
+     * timeout == 0 (i.e. non-blocking poll) but there is no guarantee that the
+     * operating system didn't reschedule our process while in the syscall.
+     */
+    SAVE_ERRNO(uv__update_time(loop));
+
+    if (nfds == 0) {
+      assert(timeout != -1);
+      return;
+    }
+
+    if (nfds == -1) {
+      if (errno != EINTR) {
+        abort();
+      }
+
+      if (timeout == -1)
+        continue;
+
+      if (timeout == 0)
+        return;
+
+      /* Interrupted by a signal. Update timeout and poll again. */
+      goto update_timeout;
+    }
+
+    nevents = 0;
+
+    assert(loop->watchers != NULL);
+    loop->watchers[loop->nwatchers] = (void*) events;
+    loop->watchers[loop->nwatchers + 1] = (void*) (uintptr_t) nfds;
+
+    for (i = 0; i < nfds; i++) {
+      pe = events + i;
+      pc.cmd = PS_DELETE;
+      pc.fd = pe->fd;
+
+      /* Skip invalidated events, see uv__platform_invalidate_fd */
+      if (pc.fd == -1)
+        continue;
+
+      assert(pc.fd >= 0);
+      assert((unsigned) pc.fd < loop->nwatchers);
+
+      w = loop->watchers[pc.fd];
+
+      if (w == NULL) {
+        /* File descriptor that we've stopped watching, disarm it.
+         *
+         * Ignore all errors because we may be racing with another thread
+         * when the file descriptor is closed.
+         */
+        pollset_ctl(loop->backend_fd, &pc, 1);
+        continue;
+      }
+
+      w->cb(loop, w, pe->revents);
+      nevents++;
+    }
+
+    loop->watchers[loop->nwatchers] = NULL;
+    loop->watchers[loop->nwatchers + 1] = NULL;
+
+    if (nevents != 0) {
+      if (nfds == ARRAY_SIZE(events) && --count != 0) {
+        /* Poll for more events but don't block this time. */
+        timeout = 0;
+        continue;
+      }
+      return;
+    }
+
+    if (timeout == 0)
+      return;
+
+    if (timeout == -1)
+      continue;
+
+update_timeout:
+    assert(timeout > 0);
+
+    diff = loop->time - base;
+    if (diff >= (uint64_t) timeout)
+      return;
+
+    timeout -= diff;
+  }
+}
+
+
 uint64_t uv__hrtime(uv_clocktype_t type) {
   uint64_t G = 1000000000;
   timebasestruct_t t;
@@ -58,28 +281,24 @@ uint64_t uv__hrtime(uv_clocktype_t type) {
  * We could use a static buffer for the path manipulations that we need outside
  * of the function, but this function could be called by multiple consumers and
  * we don't want to potentially create a race condition in the use of snprintf.
+ * There is no direct way of getting the exe path in AIX - either through /procfs
+ * or through some libc APIs. The below approach is to parse the argv[0]'s pattern
+ * and use it in conjunction with PATH environment variable to craft one.
  */
 int uv_exepath(char* buffer, size_t* size) {
   ssize_t res;
-  char pp[64], cwdl[PATH_MAX];
+  char cwd[PATH_MAX], cwdl[PATH_MAX];
+  char symlink[PATH_MAX], temp_buffer[PATH_MAX];
+  char pp[64];
   struct psinfo ps;
   int fd;
+  char **argv;
 
-  if (buffer == NULL)
-    return (-1);
-
-  if (size == NULL)
-    return (-1);
-
-  (void) snprintf(pp, sizeof(pp), "/proc/%lu/cwd", (unsigned long) getpid());
-
-  res = readlink(pp, cwdl, sizeof(cwdl) - 1);
-  if (res < 0)
-    return res;
+  if ((buffer == NULL) || (size == NULL))
+    return -EINVAL;
 
-  cwdl[res] = '\0';
+  snprintf(pp, sizeof(pp), "/proc/%lu/psinfo", (unsigned long) getpid());
 
-  (void) snprintf(pp, sizeof(pp), "/proc/%lu/psinfo", (unsigned long) getpid());
   fd = open(pp, O_RDONLY);
   if (fd < 0)
     return fd;
@@ -89,9 +308,163 @@ int uv_exepath(char* buffer, size_t* size) {
   if (res < 0)
     return res;
 
-  (void) snprintf(buffer, *size, "%s%s", cwdl, ps.pr_fname);
-  *size = strlen(buffer);
-  return 0;
+  if (ps.pr_argv == 0)
+    return -EINVAL;
+
+  argv = (char **) *((char ***) (intptr_t) ps.pr_argv);
+
+  if ((argv == NULL) || (argv[0] == NULL))
+    return -EINVAL;
+
+  /*
+   * Three possibilities for argv[0]:
+   * i) an absolute path such as: /home/user/myprojects/nodejs/node
+   * ii) a relative path such as: ./node or ./myprojects/nodejs/node
+   * iii) a bare filename such as "node", after exporting PATH variable 
+   *     to its location.
+   */
+
+  /* case #1, absolute path. */
+  if (argv[0][0] == '/') {
+    snprintf(symlink, PATH_MAX-1, "%s", argv[0]);
+
+    /* This could or could not be a symlink. */
+    res = readlink(symlink, temp_buffer, PATH_MAX-1);
+
+    /* if readlink fails, it is a normal file just copy symlink to the 
+     * outbut buffer. 
+     */
+    if (res < 0) {
+      assert(*size > strlen(symlink));
+      strcpy(buffer, symlink);
+
+    /* If it is a link, the resolved filename is again a relative path,
+     * make it absolute. 
+     */
+    } else {
+      assert(*size > (strlen(symlink) + 1 + strlen(temp_buffer)));
+      snprintf(buffer, *size-1, "%s/%s", dirname(symlink), temp_buffer);
+    }
+    *size = strlen(buffer);
+    return 0;
+
+  /* case #2, relative path with usage of '.' */
+  } else if (argv[0][0] == '.') {
+    char *relative = strchr(argv[0], '/');
+    if (relative == NULL)
+      return -EINVAL;
+
+    /* Get the current working directory to resolve the relative path. */
+    snprintf(cwd, PATH_MAX-1, "/proc/%lu/cwd", (unsigned long) getpid());
+
+    /* This is always a symlink, resolve it. */
+    res = readlink(cwd, cwdl, sizeof(cwdl) - 1);
+    if (res < 0)
+      return -errno;
+
+    snprintf(symlink, PATH_MAX-1, "%s%s", cwdl, relative + 1);
+
+    res = readlink(symlink, temp_buffer, PATH_MAX-1);
+    if (res < 0) {
+      assert(*size > strlen(symlink));
+      strcpy(buffer, symlink);
+    } else {
+      assert(*size > (strlen(symlink) + 1 + strlen(temp_buffer)));
+      snprintf(buffer, *size-1, "%s/%s", dirname(symlink), temp_buffer);
+    }
+    *size = strlen(buffer);
+    return 0;
+
+  /* case #3, relative path without usage of '.', such as invocations in Node test suite. */
+  } else if (strchr(argv[0], '/') != NULL) {
+    /* Get the current working directory to resolve the relative path. */
+    snprintf(cwd, PATH_MAX-1, "/proc/%lu/cwd", (unsigned long) getpid());
+
+    /* This is always a symlink, resolve it. */
+    res = readlink(cwd, cwdl, sizeof(cwdl) - 1);
+    if (res < 0)
+      return -errno;
+
+    snprintf(symlink, PATH_MAX-1, "%s%s", cwdl, argv[0]);
+
+    res = readlink(symlink, temp_buffer, PATH_MAX-1);
+    if (res < 0) {
+      assert(*size > strlen(symlink));
+      strcpy(buffer, symlink);
+    } else {
+      assert(*size > (strlen(symlink) + 1 + strlen(temp_buffer)));
+      snprintf(buffer, *size-1, "%s/%s", dirname(symlink), temp_buffer);
+    }
+    *size = strlen(buffer);
+    return 0;
+  /* Usage of absolute filename with location exported in PATH */
+  } else {
+    char clonedpath[8192];  /* assume 8k buffer will fit PATH */
+    char *token = NULL;
+    struct stat statstruct;
+
+    /* Get the paths. */
+    char *path = getenv("PATH");
+    if(sizeof(clonedpath) <= strlen(path))
+      return -EINVAL;
+
+    /* Get a local copy. */
+    strcpy(clonedpath, path);
+
+    /* Tokenize. */
+    token = strtok(clonedpath, ":");
+
+    /* Get current working directory. (may be required in the loop). */
+    snprintf(cwd, PATH_MAX-1, "/proc/%lu/cwd", (unsigned long) getpid());
+    res = readlink(cwd, cwdl, sizeof(cwdl) - 1);
+    if (res < 0)
+      return -errno;
+    /* Run through the tokens, append our executable file name with each,
+     * and see which one succeeds. Exit on first match. */
+    while(token != NULL) {
+      if (token[0] == '.') {
+        /* Path contains a token relative to current directory. */
+        char *relative = strchr(token, '/');
+        if (relative != NULL)
+          /* A path which is not current directory. */
+          snprintf(symlink, PATH_MAX-1, "%s%s/%s", cwdl, relative+1, ps.pr_fname);
+        else
+          snprintf(symlink, PATH_MAX-1, "%s%s", cwdl, ps.pr_fname);
+        if (stat(symlink, &statstruct) != -1) {
+          /* File exists. Resolve if it is a link. */
+          res = readlink(symlink, temp_buffer, PATH_MAX-1);
+          if (res < 0) {
+            assert(*size > strlen(symlink));
+            strcpy(buffer, symlink);
+          } else {
+            assert(*size > (strlen(symlink) + 1 + strlen(temp_buffer)));
+            snprintf(buffer, *size-1, "%s/%s", dirname(symlink), temp_buffer);
+          }
+          *size = strlen(buffer);
+          return 0;
+        }
+
+        /* Absolute path names. */
+      } else {
+        snprintf(symlink, PATH_MAX-1, "%s/%s", token, ps.pr_fname);
+        if (stat(symlink, &statstruct) != -1) {
+          res = readlink(symlink, temp_buffer, PATH_MAX-1);
+          if (res < 0) {
+            assert(*size > strlen(symlink));
+            strcpy(buffer, symlink);
+          } else {
+            assert(*size > (strlen(symlink) + 1 + strlen(temp_buffer)));
+            snprintf(buffer, *size-1, "%s/%s", dirname(symlink), temp_buffer);
+          }
+          *size = strlen(buffer);
+          return 0;
+        }
+      }
+      token = strtok(NULL, ":");
+    }
+    /* Out of tokens (path entries), and no match found */
+    return -EINVAL;
+  }
 }
 
 
@@ -128,8 +501,369 @@ void uv_loadavg(double avg[3]) {
 }
 
 
+static char *uv__rawname(char *cp) {
+  static char rawbuf[FILENAME_MAX+1];
+  char *dp = rindex(cp, '/');
+
+  if (dp == 0)
+    return 0;
+
+  *dp = 0;
+  strcpy(rawbuf, cp);
+  *dp = '/';
+  strcat(rawbuf, "/r");
+  strcat(rawbuf, dp+1);
+  return rawbuf;
+}
+
+
+/* 
+ * Determine whether given pathname is a directory
+ * Returns 0 if the path is a directory, -1 if not
+ *
+ * Note: Opportunity here for more detailed error information but
+ *       that requires changing callers of this function as well
+ */
+static int uv__path_is_a_directory(char* filename) {
+  struct stat statbuf;
+
+  if (stat(filename, &statbuf) < 0)
+    return -1;  /* failed: not a directory, assume it is a file */
+
+  if (statbuf.st_type == VDIR)
+    return 0;
+
+  return -1;
+}
+
+
+/* 
+ * Check whether AHAFS is mounted.
+ * Returns 0 if AHAFS is mounted, or an error code < 0 on failure
+ */
+static int uv__is_ahafs_mounted(void){
+  int rv, i = 2;
+  struct vmount *p;
+  int size_multiplier = 10;
+  size_t siz = sizeof(struct vmount)*size_multiplier;
+  struct vmount *vmt;
+  const char *dev = "/aha";
+  char *obj, *stub;
+
+  p = malloc(siz);
+  if (p == NULL)
+    return -errno;
+
+  /* Retrieve all mounted filesystems */
+  rv = mntctl(MCTL_QUERY, siz, (char*)p);
+  if (rv < 0)
+    return -errno;
+  if (rv == 0) {
+    /* buffer was not large enough, reallocate to correct size */
+    siz = *(int*)p;
+    free(p);
+    p = malloc(siz);
+    if (p == NULL)
+      return -errno;
+    rv = mntctl(MCTL_QUERY, siz, (char*)p);
+    if (rv < 0)
+      return -errno;
+  }
+
+  /* Look for dev in filesystems mount info */
+  for(vmt = p, i = 0; i < rv; i++) {
+    obj = vmt2dataptr(vmt, VMT_OBJECT);     /* device */
+    stub = vmt2dataptr(vmt, VMT_STUB);      /* mount point */
+
+    if (EQ(obj, dev) || EQ(uv__rawname(obj), dev) || EQ(stub, dev)) {
+      free(p);  /* Found a match */
+      return 0;
+    }
+    vmt = (struct vmount *) ((char *) vmt + vmt->vmt_length);
+  }
+
+  /* /aha is required for monitoring filesystem changes */
+  return -1;
+}
+
+/*
+ * Recursive call to mkdir() to create intermediate folders, if any
+ * Returns code from mkdir call
+ */
+static int uv__makedir_p(const char *dir) {
+  char tmp[256];
+  char *p = NULL;
+  size_t len;
+  int err;
+
+  snprintf(tmp, sizeof(tmp),"%s",dir);
+  len = strlen(tmp);
+  if (tmp[len - 1] == '/')
+    tmp[len - 1] = 0;
+  for (p = tmp + 1; *p; p++) {
+    if (*p == '/') {
+      *p = 0;
+      err = mkdir(tmp, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
+      if(err != 0)
+        return err;
+      *p = '/';
+    }
+  }
+  return mkdir(tmp, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
+}
+
+/* 
+ * Creates necessary subdirectories in the AIX Event Infrastructure
+ * file system for monitoring the object specified.
+ * Returns code from mkdir call
+ */
+static int uv__make_subdirs_p(const char *filename) {
+  char cmd[2048];
+  char *p;
+  int rc = 0;
+
+  /* Strip off the monitor file name */
+  p = strrchr(filename, '/');
+
+  if (p == NULL)
+    return 0;
+
+  if (uv__path_is_a_directory((char*)filename) == 0) {
+    sprintf(cmd, "/aha/fs/modDir.monFactory");
+  } else {
+    sprintf(cmd, "/aha/fs/modFile.monFactory");
+  }
+
+  strncat(cmd, filename, (p - filename));
+  rc = uv__makedir_p(cmd);
+
+  if (rc == -1 && errno != EEXIST){
+    return -errno;
+  }
+
+  return rc;
+}
+
+
+/*
+ * Checks if /aha is mounted, then proceeds to set up the monitoring
+ * objects for the specified file.
+ * Returns 0 on success, or an error code < 0 on failure
+ */
+static int uv__setup_ahafs(const char* filename, int *fd) {
+  int rc = 0;
+  char mon_file_write_string[RDWR_BUF_SIZE];
+  char mon_file[PATH_MAX];
+  int file_is_directory = 0; /* -1 == NO, 0 == YES  */
+
+  /* Create monitor file name for object */
+  file_is_directory = uv__path_is_a_directory((char*)filename);
+
+  if (file_is_directory == 0)
+    sprintf(mon_file, "/aha/fs/modDir.monFactory");
+  else
+    sprintf(mon_file, "/aha/fs/modFile.monFactory");
+
+  if ((strlen(mon_file) + strlen(filename) + 5) > PATH_MAX)
+    return -ENAMETOOLONG;
+
+  /* Make the necessary subdirectories for the monitor file */
+  rc = uv__make_subdirs_p(filename);
+  if (rc == -1 && errno != EEXIST)
+    return rc;
+
+  strcat(mon_file, filename);
+  strcat(mon_file, ".mon");
+
+  *fd = 0; errno = 0;
+
+  /* Open the monitor file, creating it if necessary */
+  *fd = open(mon_file, O_CREAT|O_RDWR);
+  if (*fd < 0)
+    return -errno;
+
+  /* Write out the monitoring specifications.
+   * In this case, we are monitoring for a state change event type
+   *    CHANGED=YES
+   * We will be waiting in select call, rather than a read:
+   *    WAIT_TYPE=WAIT_IN_SELECT
+   * We only want minimal information for files:
+   *      INFO_LVL=1
+   * For directories, we want more information to track what file
+   * caused the change
+   *      INFO_LVL=2
+   */
+
+  if (file_is_directory == 0)
+    sprintf(mon_file_write_string, "CHANGED=YES;WAIT_TYPE=WAIT_IN_SELECT;INFO_LVL=2");
+  else
+    sprintf(mon_file_write_string, "CHANGED=YES;WAIT_TYPE=WAIT_IN_SELECT;INFO_LVL=1");
+
+  rc = write(*fd, mon_file_write_string, strlen(mon_file_write_string)+1);
+  if (rc < 0)
+    return -errno;
+
+  return 0;
+}
+
+/*
+ * Skips a specified number of lines in the buffer passed in.
+ * Walks the buffer pointed to by p and attempts to skip n lines.
+ * Returns the total number of lines skipped
+ */
+static int uv__skip_lines(char **p, int n) {
+  int lines = 0;
+
+  while(n > 0) {
+    *p = strchr(*p, '\n');
+    if (!p)
+      return lines;
+
+    (*p)++;
+    n--;
+    lines++;
+  }
+  return lines;
+}
+
+
+/*
+ * Parse the event occurrence data to figure out what event just occurred
+ * and take proper action.
+ * 
+ * The buf is a pointer to the buffer containing the event occurrence data
+ * Returns 0 on success, -1 if unrecoverable error in parsing
+ *
+ */
+static int uv__parse_data(char *buf, int *events, uv_fs_event_t* handle) {
+  int    evp_rc, i;
+  char   *p;
+  char   filename[PATH_MAX]; /* To be used when handling directories */
+
+  p = buf;
+  *events = 0;
+
+  /* Clean the filename buffer*/
+  for(i = 0; i < PATH_MAX; i++) {
+    filename[i] = 0;
+  }
+  i = 0;
+
+  /* Check for BUF_WRAP */
+  if (strncmp(buf, "BUF_WRAP", strlen("BUF_WRAP")) == 0) {
+    assert(0 && "Buffer wrap detected, Some event occurrences lost!");
+    return 0;
+  }
+
+  /* Since we are using the default buffer size (4K), and have specified
+   * INFO_LVL=1, we won't see any EVENT_OVERFLOW conditions.  Applications
+   * should check for this keyword if they are using an INFO_LVL of 2 or
+   * higher, and have a buffer size of <= 4K
+   */
+
+  /* Skip to RC_FROM_EVPROD */
+  if (uv__skip_lines(&p, 9) != 9)
+    return -1;
+
+  if (sscanf(p, "RC_FROM_EVPROD=%d\nEND_EVENT_DATA", &evp_rc) == 1) {
+    if (uv__path_is_a_directory(handle->path) == 0) { /* Directory */
+      if (evp_rc == AHAFS_MODDIR_UNMOUNT || evp_rc == AHAFS_MODDIR_REMOVE_SELF) {
+        /* The directory is no longer available for monitoring */
+        *events = UV_RENAME;
+        handle->dir_filename = NULL;
+      } else {
+        /* A file was added/removed inside the directory */
+        *events = UV_CHANGE;
+
+        /* Get the EVPROD_INFO */
+        if (uv__skip_lines(&p, 1) != 1)
+          return -1;
+
+        /* Scan out the name of the file that triggered the event*/
+        if (sscanf(p, "BEGIN_EVPROD_INFO\n%sEND_EVPROD_INFO", filename) == 1) {
+          handle->dir_filename = strdup((const char*)&filename);
+        } else
+          return -1;
+        }
+    } else { /* Regular File */
+      if (evp_rc == AHAFS_MODFILE_RENAME)
+        *events = UV_RENAME;
+      else
+        *events = UV_CHANGE;
+    }
+  }
+  else
+    return -1;
+
+  return 0;
+}
+
+
+/* This is the internal callback */
+static void uv__ahafs_event(uv_loop_t* loop, uv__io_t* event_watch, unsigned int fflags) {
+  char   result_data[RDWR_BUF_SIZE];
+  int bytes, rc = 0;
+  uv_fs_event_t* handle;
+  int events = 0;
+  int  i = 0;
+  char fname[PATH_MAX];
+  char *p;
+
+  handle = container_of(event_watch, uv_fs_event_t, event_watcher);
+
+  /* Clean all the buffers*/
+  for(i = 0; i < PATH_MAX; i++) {
+    fname[i] = 0;
+  }
+  i = 0;
+
+  /* At this point, we assume that polling has been done on the
+   * file descriptor, so we can just read the AHAFS event occurrence
+   * data and parse its results without having to block anything
+   */
+  bytes = pread(event_watch->fd, result_data, RDWR_BUF_SIZE, 0);
+
+  assert((bytes <= 0) && "uv__ahafs_event - Error reading monitor file");
+
+  /* Parse the data */
+  if(bytes > 0)
+    rc = uv__parse_data(result_data, &events, handle);
+
+  /* For directory changes, the name of the files that triggered the change
+   * are never absolute pathnames
+   */
+  if (uv__path_is_a_directory(handle->path) == 0) {
+    p = handle->dir_filename;
+    while(*p != NULL){
+      fname[i]= *p;
+      i++;
+      p++;
+    }
+  } else {
+    /* For file changes, figure out whether filename is absolute or not */
+    if (handle->path[0] == '/') {
+      p = strrchr(handle->path, '/');
+      p++;
+
+      while(*p != NULL) {
+        fname[i]= *p;
+        i++;
+        p++;
+      }
+    }
+  }
+
+  /* Unrecoverable error */
+  if (rc == -1)
+    return;
+  else /* Call the actual JavaScript callback function */
+    handle->cb(handle, (const char*)&fname, events, 0);
+}
+
+
 int uv_fs_event_init(uv_loop_t* loop, uv_fs_event_t* handle) {
-  return -ENOSYS;
+  uv__handle_init(loop, (uv_handle_t*)handle, UV_FS_EVENT);
+  return 0;
 }
 
 
@@ -137,17 +871,99 @@ int uv_fs_event_start(uv_fs_event_t* handle,
                       uv_fs_event_cb cb,
                       const char* filename,
                       unsigned int flags) {
-  return -ENOSYS;
+  int  fd, rc, i = 0, res = 0;
+  char cwd[PATH_MAX];
+  char absolute_path[PATH_MAX];
+  char fname[PATH_MAX];
+  char *p;
+
+  /* Clean all the buffers*/
+  for(i = 0; i < PATH_MAX; i++) {
+    cwd[i] = 0;
+    absolute_path[i] = 0;
+    fname[i] = 0;
+  }
+  i = 0;
+
+  /* Figure out whether filename is absolute or not */
+  if (filename[0] == '/') {
+    /* We have absolute pathname, create the relative pathname*/
+    sprintf(absolute_path, filename);
+    p = strrchr(filename, '/');
+    p++;
+  } else {
+    if (filename[0] == '.' && filename[1] == '/') {
+      /* We have a relative pathname, compose the absolute pathname */
+      sprintf(fname, filename);
+      snprintf(cwd, PATH_MAX-1, "/proc/%lu/cwd", (unsigned long) getpid());
+      res = readlink(cwd, absolute_path, sizeof(absolute_path) - 1);
+      if (res < 0)
+        return res;
+      p = strrchr(absolute_path, '/');
+      p++;
+      p++;
+    } else {
+      /* We have a relative pathname, compose the absolute pathname */
+      sprintf(fname, filename);
+      snprintf(cwd, PATH_MAX-1, "/proc/%lu/cwd", (unsigned long) getpid());
+      res = readlink(cwd, absolute_path, sizeof(absolute_path) - 1);
+      if (res < 0)
+        return res;
+      p = strrchr(absolute_path, '/');
+      p++;
+    }
+    /* Copy to filename buffer */
+    while(filename[i] != NULL) {
+      *p = filename[i];
+      i++;
+      p++;
+    }
+  }
+
+  if (uv__is_ahafs_mounted() < 0)  /* /aha checks failed */
+    return UV_ENOSYS;
+
+  /* Setup ahafs */
+  rc = uv__setup_ahafs((const char *)absolute_path, &fd);
+  if (rc != 0)
+    return rc;
+
+  /* Setup/Initialize all the libuv routines */
+  uv__handle_start(handle);
+  uv__io_init(&handle->event_watcher, uv__ahafs_event, fd);
+  handle->path = strdup((const char*)&absolute_path);
+  handle->cb = cb;
+
+  uv__io_start(handle->loop, &handle->event_watcher, UV__POLLIN);
+
+  return 0;
 }
 
 
 int uv_fs_event_stop(uv_fs_event_t* handle) {
-  return -ENOSYS;
+
+  if (!uv__is_active(handle))
+    return 0;
+
+  uv__io_close(handle->loop, &handle->event_watcher);
+  uv__handle_stop(handle);
+
+  if (uv__path_is_a_directory(handle->path) == 0) {
+    free(handle->dir_filename);
+    handle->dir_filename = NULL;
+  }
+
+  free(handle->path);
+  handle->path = NULL;
+  uv__close(handle->event_watcher.fd);
+  handle->event_watcher.fd = -1;
+
+  return 0;
 }
 
 
 void uv__fs_event_close(uv_fs_event_t* handle) {
-  UNREACHABLE();
+  uv_fs_event_stop(handle);
 }
 
 
@@ -175,7 +991,7 @@ int uv_resident_set_memory(size_t* rss) {
   int err;
   int fd;
 
-  (void) snprintf(pp, sizeof(pp), "/proc/%lu/psinfo", (unsigned long) getpid());
+  snprintf(pp, sizeof(pp), "/proc/%lu/psinfo", (unsigned long) getpid());
 
   fd = open(pp, O_RDONLY);
   if (fd == -1)
@@ -397,3 +1213,21 @@ void uv_free_interface_addresses(uv_interface_address_t* addresses,
 
   free(addresses);
 }
+
+void uv__platform_invalidate_fd(uv_loop_t* loop, int fd) {
+  struct pollfd* events;
+  uintptr_t i;
+  uintptr_t nfds;
+
+  assert(loop->watchers != NULL);
+
+  events = (struct pollfd*) loop->watchers[loop->nwatchers];
+  nfds = (uintptr_t) loop->watchers[loop->nwatchers + 1];
+  if (events == NULL)
+    return;
+
+  /* Invalidate events with same file descriptor */
+  for (i = 0; i < nfds; i++)
+    if ((int) events[i].fd == fd)
+      events[i].fd = -1;
+}
diff --git a/deps/uv/src/unix/core.c b/deps/uv/src/unix/core.c
index 402bb00eb2..4770d8d8c6 100644
--- a/deps/uv/src/unix/core.c
+++ b/deps/uv/src/unix/core.c
@@ -70,6 +70,10 @@
 # endif
 #endif
 
+#ifdef _AIX
+#include <sys/ioctl.h>
+#endif
+
 static void uv__run_pending(uv_loop_t* loop);
 
 /* Verify that uv_buf_t is ABI-compatible with struct iovec. */
@@ -444,7 +448,8 @@ int uv__close(int fd) {
 }
 
 
-#if defined(__linux__) || defined(__FreeBSD__) || defined(__APPLE__)
+#if defined(__linux__) || defined(__FreeBSD__) || defined(__APPLE__) || \
+    defined(_AIX)
 
 int uv__nonblock(int fd, int set) {
   int r;
diff --git a/deps/uv/src/unix/fs.c b/deps/uv/src/unix/fs.c
index 8a4edcbc0a..47f667229d 100644
--- a/deps/uv/src/unix/fs.c
+++ b/deps/uv/src/unix/fs.c
@@ -214,9 +214,23 @@ skip:
 }
 
 
+static ssize_t uv__fs_mkdtemp(uv_fs_t* req) {
+  return mkdtemp((char*) req->path) ? 0 : -1;
+}
+
+
 static ssize_t uv__fs_read(uv_fs_t* req) {
   ssize_t result;
 
+#if defined(_AIX)
+  struct stat buf;
+  if(fstat(req->file, &buf))
+    return -1;
+  if(S_ISDIR(buf.st_mode)) {
+    errno = EISDIR;
+    return -1;
+  }
+#endif /* defined(_AIX) */
   if (req->off < 0) {
     if (req->nbufs == 1)
       result = read(req->file, req->bufs[0].base, req->bufs[0].len);
@@ -683,7 +697,8 @@ static void uv__to_stat(struct stat* src, uv_stat_t* dst) {
   dst->st_birthtim.tv_nsec = src->st_birthtimespec.tv_nsec;
   dst->st_flags = src->st_flags;
   dst->st_gen = src->st_gen;
-#elif defined(_BSD_SOURCE) || defined(_SVID_SOURCE) || defined(_XOPEN_SOURCE)
+#elif !defined(_AIX) && \
+  (defined(_BSD_SOURCE) || defined(_SVID_SOURCE) || defined(_XOPEN_SOURCE))
   dst->st_atim.tv_sec = src->st_atim.tv_sec;
   dst->st_atim.tv_nsec = src->st_atim.tv_nsec;
   dst->st_mtim.tv_sec = src->st_mtim.tv_sec;
@@ -779,6 +794,7 @@ static void uv__fs_work(struct uv__work* w) {
     X(LSTAT, uv__fs_lstat(req->path, &req->statbuf));
     X(LINK, link(req->path, req->new_path));
     X(MKDIR, mkdir(req->path, req->mode));
+    X(MKDTEMP, uv__fs_mkdtemp(req));
     X(READ, uv__fs_read(req));
     X(READDIR, uv__fs_readdir(req));
     X(READLINK, uv__fs_readlink(req));
@@ -991,6 +1007,18 @@ int uv_fs_mkdir(uv_loop_t* loop,
 }
 
 
+int uv_fs_mkdtemp(uv_loop_t* loop,
+                  uv_fs_t* req,
+                  const char* tpl,
+                  uv_fs_cb cb) {
+  INIT(MKDTEMP);
+  req->path = strdup(tpl);
+  if (req->path == NULL)
+    return -ENOMEM;
+  POST;
+}
+
+
 int uv_fs_open(uv_loop_t* loop,
                uv_fs_t* req,
                const char* path,
diff --git a/deps/uv/src/unix/internal.h b/deps/uv/src/unix/internal.h
index fd29b88d42..114cb696ee 100644
--- a/deps/uv/src/unix/internal.h
+++ b/deps/uv/src/unix/internal.h
@@ -42,6 +42,12 @@
 # include <port.h>
 #endif /* __sun */
 
+#if defined(_AIX)
+#define reqevents events
+#define rtnevents revents
+#include <sys/poll.h>
+#endif /* _AIX */
+
 #if defined(__APPLE__) && !TARGET_OS_IPHONE
 # include <CoreServices/CoreServices.h>
 #endif
@@ -89,7 +95,7 @@
 # define UV__POLLHUP  UV__EPOLLHUP
 #endif
 
-#if defined(__sun)
+#if defined(__sun) || defined(_AIX)
 # define UV__POLLIN   POLLIN
 # define UV__POLLOUT  POLLOUT
 # define UV__POLLERR  POLLERR
@@ -210,13 +216,6 @@ void uv__signal_close(uv_signal_t* handle);
 void uv__signal_global_once_init(void);
 void uv__signal_loop_cleanup(uv_loop_t* loop);
 
-/* thread pool */
-void uv__work_submit(uv_loop_t* loop,
-                     struct uv__work *w,
-                     void (*work)(struct uv__work *w),
-                     void (*done)(struct uv__work *w, int status));
-void uv__work_done(uv_async_t* handle);
-
 /* platform specific */
 uint64_t uv__hrtime(uv_clocktype_t type);
 int uv__kqueue_init(uv_loop_t* loop);
diff --git a/deps/uv/src/unix/loop.c b/deps/uv/src/unix/loop.c
index 52c9328e75..aa74be6455 100644
--- a/deps/uv/src/unix/loop.c
+++ b/deps/uv/src/unix/loop.c
@@ -89,8 +89,10 @@ uv_loop_t* uv_loop_new(void) {
 
 void uv_loop_delete(uv_loop_t* loop) {
   uv_loop_t* default_loop;
+  int err;
   default_loop = default_loop_ptr;
-  assert(uv_loop_close(loop) == 0);
+  err = uv_loop_close(loop);
+  assert(err == 0);
   if (loop != default_loop)
     free(loop);
 }
diff --git a/deps/uv/src/unix/openbsd.c b/deps/uv/src/unix/openbsd.c
index 75ba921637..cde8d4d0c9 100644
--- a/deps/uv/src/unix/openbsd.c
+++ b/deps/uv/src/unix/openbsd.c
@@ -180,29 +180,23 @@ int uv_get_process_title(char* buffer, size_t size) {
 
 
 int uv_resident_set_memory(size_t* rss) {
-  kvm_t *kd = NULL;
-  struct kinfo_proc *kinfo = NULL;
-  pid_t pid;
-  int nprocs, max_size = sizeof(struct kinfo_proc);
+  struct kinfo_proc kinfo;
   size_t page_size = getpagesize();
+  size_t size = sizeof(struct kinfo_proc);
+  int mib[6];
 
-  pid = getpid();
+  mib[0] = CTL_KERN;
+  mib[1] = KERN_PROC;
+  mib[2] = KERN_PROC_PID;
+  mib[3] = getpid();
+  mib[4] = sizeof(struct kinfo_proc);
+  mib[5] = 1;
 
-  kd = kvm_open(NULL, _PATH_MEM, NULL, O_RDONLY, "kvm_open");
-  if (kd == NULL) goto error;
-
-  kinfo = kvm_getprocs(kd, KERN_PROC_PID, pid, max_size, &nprocs);
-  if (kinfo == NULL) goto error;
-
-  *rss = kinfo->p_vm_rssize * page_size;
-
-  kvm_close(kd);
+  if (sysctl(mib, 6, &kinfo, &size, NULL, 0) < 0)
+    return -errno;
 
+  *rss = kinfo.p_vm_rssize * page_size;
   return 0;
-
-error:
-  if (kd) kvm_close(kd);
-  return -EPERM;
 }
 
 
diff --git a/deps/uv/src/unix/stream.c b/deps/uv/src/unix/stream.c
index 43334f0efb..ae7880c33f 100644
--- a/deps/uv/src/unix/stream.c
+++ b/deps/uv/src/unix/stream.c
@@ -60,21 +60,10 @@ static void uv__stream_connect(uv_stream_t*);
 static void uv__write(uv_stream_t* stream);
 static void uv__read(uv_stream_t* stream);
 static void uv__stream_io(uv_loop_t* loop, uv__io_t* w, unsigned int events);
+static void uv__write_callbacks(uv_stream_t* stream);
 static size_t uv__write_req_size(uv_write_t* req);
 
 
-static size_t uv_count_bufs(const uv_buf_t bufs[], unsigned int nbufs) {
-  unsigned int i;
-  size_t bytes;
-
-  bytes = 0;
-  for (i = 0; i < nbufs; i++)
-    bytes += bufs[i].len;
-
-  return bytes;
-}
-
-
 void uv__stream_init(uv_loop_t* loop,
                      uv_stream_t* stream,
                      uv_handle_type type) {
@@ -390,33 +379,12 @@ void uv__stream_destroy(uv_stream_t* stream) {
     QUEUE_REMOVE(q);
 
     req = QUEUE_DATA(q, uv_write_t, queue);
-    uv__req_unregister(stream->loop, req);
+    req->error = -ECANCELED;
 
-    if (req->bufs != req->bufsml)
-      free(req->bufs);
-    req->bufs = NULL;
-
-    if (req->cb != NULL)
-      req->cb(req, -ECANCELED);
+    QUEUE_INSERT_TAIL(&stream->write_completed_queue, &req->queue);
   }
 
-  while (!QUEUE_EMPTY(&stream->write_completed_queue)) {
-    q = QUEUE_HEAD(&stream->write_completed_queue);
-    QUEUE_REMOVE(q);
-
-    req = QUEUE_DATA(q, uv_write_t, queue);
-    uv__req_unregister(stream->loop, req);
-
-    if (req->bufs != NULL) {
-      stream->write_queue_size -= uv__write_req_size(req);
-      if (req->bufs != req->bufsml)
-        free(req->bufs);
-      req->bufs = NULL;
-    }
-
-    if (req->cb)
-      req->cb(req, req->error);
-  }
+  uv__write_callbacks(stream);
 
   if (stream->shutdown_req) {
     /* The ECANCELED error code is a lie, the shutdown(2) syscall is a
@@ -428,6 +396,8 @@ void uv__stream_destroy(uv_stream_t* stream) {
     stream->shutdown_req->cb(stream->shutdown_req, -ECANCELED);
     stream->shutdown_req = NULL;
   }
+
+  assert(stream->write_queue_size == 0);
 }
 
 
@@ -660,8 +630,8 @@ static size_t uv__write_req_size(uv_write_t* req) {
   size_t size;
 
   assert(req->bufs != NULL);
-  size = uv_count_bufs(req->bufs + req->write_index,
-                       req->nbufs - req->write_index);
+  size = uv__count_bufs(req->bufs + req->write_index,
+                        req->nbufs - req->write_index);
   assert(req->handle->write_queue_size >= size);
 
   return size;
@@ -903,10 +873,6 @@ static void uv__write_callbacks(uv_stream_t* stream) {
   }
 
   assert(QUEUE_EMPTY(&stream->write_completed_queue));
-
-  /* Write queue drained. */
-  if (QUEUE_EMPTY(&stream->write_queue))
-    uv__drain(stream);
 }
 
 
@@ -1223,6 +1189,10 @@ static void uv__stream_io(uv_loop_t* loop, uv__io_t* w, unsigned int events) {
   if (events & (UV__POLLOUT | UV__POLLERR | UV__POLLHUP)) {
     uv__write(stream);
     uv__write_callbacks(stream);
+
+    /* Write queue drained. */
+    if (QUEUE_EMPTY(&stream->write_queue))
+      uv__drain(stream);
   }
 }
 
@@ -1327,7 +1297,7 @@ int uv_write2(uv_write_t* req,
   memcpy(req->bufs, bufs, nbufs * sizeof(bufs[0]));
   req->nbufs = nbufs;
   req->write_index = 0;
-  stream->write_queue_size += uv_count_bufs(bufs, nbufs);
+  stream->write_queue_size += uv__count_bufs(bufs, nbufs);
 
   /* Append the request to write_queue. */
   QUEUE_INSERT_TAIL(&stream->write_queue, &req->queue);
@@ -1386,7 +1356,7 @@ int uv_try_write(uv_stream_t* stream,
 
   /* Connecting or already writing some data */
   if (stream->connect_req != NULL || stream->write_queue_size != 0)
-    return 0;
+    return -EAGAIN;
 
   has_pollout = uv__io_active(&stream->io_watcher, UV__POLLOUT);
 
@@ -1395,7 +1365,7 @@ int uv_try_write(uv_stream_t* stream,
     return r;
 
   /* Remove not written bytes from write queue size */
-  written = uv_count_bufs(bufs, nbufs);
+  written = uv__count_bufs(bufs, nbufs);
   if (req.bufs != NULL)
     req_size = uv__write_req_size(&req);
   else
@@ -1416,7 +1386,10 @@ int uv_try_write(uv_stream_t* stream,
     uv__stream_osx_interrupt_select(stream);
   }
 
-  return (int) written;
+  if (written == 0)
+    return -EAGAIN;
+  else
+    return written;
 }
 
 
diff --git a/deps/uv/src/unix/udp.c b/deps/uv/src/unix/udp.c
index 9556bd7e3b..bf91cbdf9f 100644
--- a/deps/uv/src/unix/udp.c
+++ b/deps/uv/src/unix/udp.c
@@ -38,10 +38,9 @@
 
 
 static void uv__udp_run_completed(uv_udp_t* handle);
-static void uv__udp_run_pending(uv_udp_t* handle);
 static void uv__udp_io(uv_loop_t* loop, uv__io_t* w, unsigned int revents);
-static void uv__udp_recvmsg(uv_loop_t* loop, uv__io_t* w, unsigned int revents);
-static void uv__udp_sendmsg(uv_loop_t* loop, uv__io_t* w, unsigned int revents);
+static void uv__udp_recvmsg(uv_udp_t* handle);
+static void uv__udp_sendmsg(uv_udp_t* handle);
 static int uv__udp_maybe_deferred_bind(uv_udp_t* handle,
                                        int domain,
                                        unsigned int flags);
@@ -65,22 +64,19 @@ void uv__udp_finish_close(uv_udp_t* handle) {
   assert(!uv__io_active(&handle->io_watcher, UV__POLLIN | UV__POLLOUT));
   assert(handle->io_watcher.fd == -1);
 
-  uv__udp_run_completed(handle);
-
   while (!QUEUE_EMPTY(&handle->write_queue)) {
     q = QUEUE_HEAD(&handle->write_queue);
     QUEUE_REMOVE(q);
 
     req = QUEUE_DATA(q, uv_udp_send_t, queue);
-    uv__req_unregister(handle->loop, req);
+    req->status = -ECANCELED;
+    QUEUE_INSERT_TAIL(&handle->write_completed_queue, &req->queue);
+  }
 
-    if (req->bufs != req->bufsml)
-      free(req->bufs);
-    req->bufs = NULL;
+  uv__udp_run_completed(handle);
 
-    if (req->send_cb != NULL)
-      req->send_cb(req, -ECANCELED);
-  }
+  assert(handle->send_queue_size == 0);
+  assert(handle->send_queue_count == 0);
 
   /* Now tear down the handle. */
   handle->recv_cb = NULL;
@@ -89,50 +85,6 @@ void uv__udp_finish_close(uv_udp_t* handle) {
 }
 
 
-static void uv__udp_run_pending(uv_udp_t* handle) {
-  uv_udp_send_t* req;
-  QUEUE* q;
-  struct msghdr h;
-  ssize_t size;
-
-  while (!QUEUE_EMPTY(&handle->write_queue)) {
-    q = QUEUE_HEAD(&handle->write_queue);
-    assert(q != NULL);
-
-    req = QUEUE_DATA(q, uv_udp_send_t, queue);
-    assert(req != NULL);
-
-    memset(&h, 0, sizeof h);
-    h.msg_name = &req->addr;
-    h.msg_namelen = (req->addr.sin6_family == AF_INET6 ?
-      sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in));
-    h.msg_iov = (struct iovec*) req->bufs;
-    h.msg_iovlen = req->nbufs;
-
-    do {
-      size = sendmsg(handle->io_watcher.fd, &h, 0);
-    }
-    while (size == -1 && errno == EINTR);
-
-    /* TODO try to write once or twice more in the
-     * hope that the socket becomes readable again?
-     */
-    if (size == -1 && (errno == EAGAIN || errno == EWOULDBLOCK))
-      break;
-
-    req->status = (size == -1 ? -errno : size);
-
-    /* Sending a datagram is an atomic operation: either all data
-     * is written or nothing is (and EMSGSIZE is raised). That is
-     * why we don't handle partial writes. Just pop the request
-     * off the write queue and onto the completed queue, done.
-     */
-    QUEUE_REMOVE(&req->queue);
-    QUEUE_INSERT_TAIL(&handle->write_completed_queue, &req->queue);
-  }
-}
-
-
 static void uv__udp_run_completed(uv_udp_t* handle) {
   uv_udp_send_t* req;
   QUEUE* q;
@@ -144,6 +96,9 @@ static void uv__udp_run_completed(uv_udp_t* handle) {
     req = QUEUE_DATA(q, uv_udp_send_t, queue);
     uv__req_unregister(handle->loop, req);
 
+    handle->send_queue_size -= uv__count_bufs(req->bufs, req->nbufs);
+    handle->send_queue_count--;
+
     if (req->bufs != req->bufsml)
       free(req->bufs);
     req->bufs = NULL;
@@ -159,33 +114,40 @@ static void uv__udp_run_completed(uv_udp_t* handle) {
     else
       req->send_cb(req, req->status);
   }
+
+  if (QUEUE_EMPTY(&handle->write_queue)) {
+    /* Pending queue and completion queue empty, stop watcher. */
+    uv__io_stop(handle->loop, &handle->io_watcher, UV__POLLOUT);
+    if (!uv__io_active(&handle->io_watcher, UV__POLLIN))
+      uv__handle_stop(handle);
+  }
 }
 
 
 static void uv__udp_io(uv_loop_t* loop, uv__io_t* w, unsigned int revents) {
+  uv_udp_t* handle;
+
+  handle = container_of(w, uv_udp_t, io_watcher);
+  assert(handle->type == UV_UDP);
+
   if (revents & UV__POLLIN)
-    uv__udp_recvmsg(loop, w, revents);
+    uv__udp_recvmsg(handle);
 
-  if (revents & UV__POLLOUT)
-    uv__udp_sendmsg(loop, w, revents);
+  if (revents & UV__POLLOUT) {
+    uv__udp_sendmsg(handle);
+    uv__udp_run_completed(handle);
+  }
 }
 
 
-static void uv__udp_recvmsg(uv_loop_t* loop,
-                            uv__io_t* w,
-                            unsigned int revents) {
+static void uv__udp_recvmsg(uv_udp_t* handle) {
   struct sockaddr_storage peer;
   struct msghdr h;
-  uv_udp_t* handle;
   ssize_t nread;
   uv_buf_t buf;
   int flags;
   int count;
 
-  handle = container_of(w, uv_udp_t, io_watcher);
-  assert(handle->type == UV_UDP);
-  assert(revents & UV__POLLIN);
-
   assert(handle->recv_cb != NULL);
   assert(handle->alloc_cb != NULL);
 
@@ -242,34 +204,43 @@ static void uv__udp_recvmsg(uv_loop_t* loop,
 }
 
 
-static void uv__udp_sendmsg(uv_loop_t* loop,
-                            uv__io_t* w,
-                            unsigned int revents) {
-  uv_udp_t* handle;
+static void uv__udp_sendmsg(uv_udp_t* handle) {
+  uv_udp_send_t* req;
+  QUEUE* q;
+  struct msghdr h;
+  ssize_t size;
 
-  handle = container_of(w, uv_udp_t, io_watcher);
-  assert(handle->type == UV_UDP);
-  assert(revents & UV__POLLOUT);
+  while (!QUEUE_EMPTY(&handle->write_queue)) {
+    q = QUEUE_HEAD(&handle->write_queue);
+    assert(q != NULL);
+
+    req = QUEUE_DATA(q, uv_udp_send_t, queue);
+    assert(req != NULL);
 
-  assert(!QUEUE_EMPTY(&handle->write_queue)
-      || !QUEUE_EMPTY(&handle->write_completed_queue));
+    memset(&h, 0, sizeof h);
+    h.msg_name = &req->addr;
+    h.msg_namelen = (req->addr.ss_family == AF_INET6 ?
+      sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in));
+    h.msg_iov = (struct iovec*) req->bufs;
+    h.msg_iovlen = req->nbufs;
 
-  /* Write out pending data first. */
-  uv__udp_run_pending(handle);
+    do {
+      size = sendmsg(handle->io_watcher.fd, &h, 0);
+    } while (size == -1 && errno == EINTR);
 
-  /* Drain 'request completed' queue. */
-  uv__udp_run_completed(handle);
+    if (size == -1 && (errno == EAGAIN || errno == EWOULDBLOCK))
+      break;
 
-  if (!QUEUE_EMPTY(&handle->write_completed_queue)) {
-    /* Schedule completion callbacks. */
-    uv__io_feed(handle->loop, &handle->io_watcher);
-  }
-  else if (QUEUE_EMPTY(&handle->write_queue)) {
-    /* Pending queue and completion queue empty, stop watcher. */
-    uv__io_stop(loop, &handle->io_watcher, UV__POLLOUT);
+    req->status = (size == -1 ? -errno : size);
 
-    if (!uv__io_active(&handle->io_watcher, UV__POLLIN))
-      uv__handle_stop(handle);
+    /* Sending a datagram is an atomic operation: either all data
+     * is written or nothing is (and EMSGSIZE is raised). That is
+     * why we don't handle partial writes. Just pop the request
+     * off the write queue and onto the completed queue, done.
+     */
+    QUEUE_REMOVE(&req->queue);
+    QUEUE_INSERT_TAIL(&handle->write_completed_queue, &req->queue);
+    uv__io_feed(handle->loop, &handle->io_watcher);
   }
 }
 
@@ -410,6 +381,7 @@ int uv__udp_send(uv_udp_send_t* req,
                  unsigned int addrlen,
                  uv_udp_send_cb send_cb) {
   int err;
+  int empty_queue;
 
   assert(nbufs > 0);
 
@@ -417,8 +389,13 @@ int uv__udp_send(uv_udp_send_t* req,
   if (err)
     return err;
 
-  uv__req_init(handle->loop, req, UV_UDP_SEND);
+  /* It's legal for send_queue_count > 0 even when the write_queue is empty;
+   * it means there are error-state requests in the write_completed_queue that
+   * will touch up send_queue_size/count later.
+   */
+  empty_queue = (handle->send_queue_count == 0);
 
+  uv__req_init(handle->loop, req, UV_UDP_SEND);
   assert(addrlen <= sizeof(req->addr));
   memcpy(&req->addr, addr, addrlen);
   req->send_cb = send_cb;
@@ -433,14 +410,60 @@ int uv__udp_send(uv_udp_send_t* req,
     return -ENOMEM;
 
   memcpy(req->bufs, bufs, nbufs * sizeof(bufs[0]));
+  handle->send_queue_size += uv__count_bufs(req->bufs, req->nbufs);
+  handle->send_queue_count++;
   QUEUE_INSERT_TAIL(&handle->write_queue, &req->queue);
-  uv__io_start(handle->loop, &handle->io_watcher, UV__POLLOUT);
   uv__handle_start(handle);
 
+  if (empty_queue)
+    uv__udp_sendmsg(handle);
+  else
+    uv__io_start(handle->loop, &handle->io_watcher, UV__POLLOUT);
+
   return 0;
 }
 
 
+int uv__udp_try_send(uv_udp_t* handle,
+                     const uv_buf_t bufs[],
+                     unsigned int nbufs,
+                     const struct sockaddr* addr,
+                     unsigned int addrlen) {
+  int err;
+  struct msghdr h;
+  ssize_t size;
+
+  assert(nbufs > 0);
+
+  /* already sending a message */
+  if (handle->send_queue_count != 0)
+    return -EAGAIN;
+
+  err = uv__udp_maybe_deferred_bind(handle, addr->sa_family, 0);
+  if (err)
+    return err;
+
+  memset(&h, 0, sizeof h);
+  h.msg_name = (struct sockaddr*) addr;
+  h.msg_namelen = addrlen;
+  h.msg_iov = (struct iovec*) bufs;
+  h.msg_iovlen = nbufs;
+
+  do {
+    size = sendmsg(handle->io_watcher.fd, &h, 0);
+  } while (size == -1 && errno == EINTR);
+
+  if (size == -1) {
+    if (errno == EAGAIN || errno == EWOULDBLOCK)
+      return -EAGAIN;
+    else
+      return -errno;
+  }
+
+  return size;
+}
+
+
 static int uv__udp_set_membership4(uv_udp_t* handle,
                                    const struct sockaddr_in* multicast_addr,
                                    const char* interface_addr,
@@ -531,6 +554,8 @@ int uv_udp_init(uv_loop_t* loop, uv_udp_t* handle) {
   uv__handle_init(loop, (uv_handle_t*)handle, UV_UDP);
   handle->alloc_cb = NULL;
   handle->recv_cb = NULL;
+  handle->send_queue_size = 0;
+  handle->send_queue_count = 0;
   uv__io_init(&handle->io_watcher, uv__udp_io, -1);
   QUEUE_INIT(&handle->write_queue);
   QUEUE_INIT(&handle->write_completed_queue);
@@ -579,7 +604,7 @@ int uv_udp_set_membership(uv_udp_t* handle,
 
 
 static int uv__setsockopt_maybe_char(uv_udp_t* handle, int option, int val) {
-#if defined(__sun)
+#if defined(__sun) || defined(_AIX)
   char arg = val;
 #else
   int arg = val;
@@ -678,7 +703,9 @@ int uv_udp_set_multicast_interface(uv_udp_t* handle, const char* interface_addr)
 }
 
 
-int uv_udp_getsockname(uv_udp_t* handle, struct sockaddr* name, int* namelen) {
+int uv_udp_getsockname(const uv_udp_t* handle,
+                       struct sockaddr* name,
+                       int* namelen) {
   socklen_t socklen;
 
   if (handle->io_watcher.fd == -1)
diff --git a/deps/uv/src/uv-common.c b/deps/uv/src/uv-common.c
index d9553c9162..4e3968cb44 100644
--- a/deps/uv/src/uv-common.c
+++ b/deps/uv/src/uv-common.c
@@ -233,6 +233,26 @@ int uv_udp_send(uv_udp_send_t* req,
 }
 
 
+int uv_udp_try_send(uv_udp_t* handle,
+                    const uv_buf_t bufs[],
+                    unsigned int nbufs,
+                    const struct sockaddr* addr) {
+  unsigned int addrlen;
+
+  if (handle->type != UV_UDP)
+    return UV_EINVAL;
+
+  if (addr->sa_family == AF_INET)
+    addrlen = sizeof(struct sockaddr_in);
+  else if (addr->sa_family == AF_INET6)
+    addrlen = sizeof(struct sockaddr_in6);
+  else
+    return UV_EINVAL;
+
+  return uv__udp_try_send(handle, bufs, nbufs, addr, addrlen);
+}
+
+
 int uv_udp_recv_start(uv_udp_t* handle,
                       uv_alloc_cb alloc_cb,
                       uv_udp_recv_cb recv_cb) {
@@ -446,6 +466,19 @@ int uv__getaddrinfo_translate_error(int sys_err) {
   return 0;  /* Pacify compiler. */
 }
 
+
+size_t uv__count_bufs(const uv_buf_t bufs[], unsigned int nbufs) {
+  unsigned int i;
+  size_t bytes;
+
+  bytes = 0;
+  for (i = 0; i < nbufs; i++)
+    bytes += (size_t) bufs[i].len;
+
+  return bytes;
+}
+
+
 int uv_fs_event_getpath(uv_fs_event_t* handle, char* buf, size_t* len) {
   size_t required_len;
 
diff --git a/deps/uv/src/uv-common.h b/deps/uv/src/uv-common.h
index 3bcdcef3d4..34c287898c 100644
--- a/deps/uv/src/uv-common.h
+++ b/deps/uv/src/uv-common.h
@@ -83,6 +83,12 @@ int uv__udp_send(uv_udp_send_t* req,
                  unsigned int addrlen,
                  uv_udp_send_cb send_cb);
 
+int uv__udp_try_send(uv_udp_t* handle,
+                     const uv_buf_t bufs[],
+                     unsigned int nbufs,
+                     const struct sockaddr* addr,
+                     unsigned int addrlen);
+
 int uv__udp_recv_start(uv_udp_t* handle, uv_alloc_cb alloccb,
                        uv_udp_recv_cb recv_cb);
 
@@ -92,6 +98,15 @@ void uv__fs_poll_close(uv_fs_poll_t* handle);
 
 int uv__getaddrinfo_translate_error(int sys_err);    /* EAI_* error. */
 
+void uv__work_submit(uv_loop_t* loop,
+                     struct uv__work *w,
+                     void (*work)(struct uv__work *w),
+                     void (*done)(struct uv__work *w, int status));
+
+void uv__work_done(uv_async_t* handle);
+
+size_t uv__count_bufs(const uv_buf_t bufs[], unsigned int nbufs);
+
 #define uv__has_active_reqs(loop)                                             \
   (QUEUE_EMPTY(&(loop)->active_reqs) == 0)
 
diff --git a/deps/uv/src/win/core.c b/deps/uv/src/win/core.c
index 540fb5fa0d..c39597561d 100644
--- a/deps/uv/src/win/core.c
+++ b/deps/uv/src/win/core.c
@@ -26,7 +26,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#if !defined(__MINGW32__)
+#if defined(_MSC_VER) || defined(__MINGW64_VERSION_MAJOR)
 #include <crtdbg.h>
 #endif
 
@@ -44,19 +44,21 @@ static uv_once_t uv_init_guard_ = UV_ONCE_INIT;
 static uv_once_t uv_default_loop_init_guard_ = UV_ONCE_INIT;
 
 
-#if defined(_DEBUG) && !defined(__MINGW32__)
-/* Our crt debug report handler allows us to temporarily disable asserts */
-/* just for the current thread. */
+#if defined(_DEBUG) && (defined(_MSC_VER) || defined(__MINGW64_VERSION_MAJOR))
+/* Our crt debug report handler allows us to temporarily disable asserts
+ * just for the current thread.
+ */
 
-__declspec( thread ) int uv__crt_assert_enabled = TRUE;
+UV_THREAD_LOCAL int uv__crt_assert_enabled = TRUE;
 
 static int uv__crt_dbg_report_handler(int report_type, char *message, int *ret_val) {
   if (uv__crt_assert_enabled || report_type != _CRT_ASSERT)
     return FALSE;
 
   if (ret_val) {
-    /* Set ret_val to 0 to continue with normal execution. */
-    /* Set ret_val to 1 to trigger a breakpoint. */
+    /* Set ret_val to 0 to continue with normal execution.
+     * Set ret_val to 1 to trigger a breakpoint.
+    */
 
     if(IsDebuggerPresent())
       *ret_val = 1;
@@ -67,6 +69,8 @@ static int uv__crt_dbg_report_handler(int report_type, char *message, int *ret_v
   /* Don't call _CrtDbgReport. */
   return TRUE;
 }
+#else
+UV_THREAD_LOCAL int uv__crt_assert_enabled = FALSE;
 #endif
 
 
@@ -84,21 +88,24 @@ static void uv_init(void) {
   SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOGPFAULTERRORBOX |
                SEM_NOOPENFILEERRORBOX);
 
-  /* Tell the CRT to not exit the application when an invalid parameter is */
-  /* passed. The main issue is that invalid FDs will trigger this behavior. */
+  /* Tell the CRT to not exit the application when an invalid parameter is
+   * passed. The main issue is that invalid FDs will trigger this behavior.
+   */
 #if !defined(__MINGW32__) || __MSVCRT_VERSION__ >= 0x800
   _set_invalid_parameter_handler(uv__crt_invalid_parameter_handler);
 #endif
 
-  /* We also need to setup our debug report handler because some CRT */
-  /* functions (eg _get_osfhandle) raise an assert when called with invalid */
-  /* FDs even though they return the proper error code in the release build. */
-#if defined(_DEBUG) && !defined(__MINGW32__)
+  /* We also need to setup our debug report handler because some CRT
+   * functions (eg _get_osfhandle) raise an assert when called with invalid
+   * FDs even though they return the proper error code in the release build.
+   */
+#if defined(_DEBUG) && (defined(_MSC_VER) || defined(__MINGW64_VERSION_MAJOR))
   _CrtSetReportHook(uv__crt_dbg_report_handler);
 #endif
 
-  /* Fetch winapi function pointers. This must be done first because other */
-  /* intialization code might need these function pointers to be loaded. */
+  /* Fetch winapi function pointers. This must be done first because other
+   * intialization code might need these function pointers to be loaded.
+   */
   uv_winapi_init();
 
   /* Initialize winsock */
@@ -127,12 +134,14 @@ int uv_loop_init(uv_loop_t* loop) {
   if (loop->iocp == NULL)
     return uv_translate_sys_error(GetLastError());
 
-  /* To prevent uninitialized memory access, loop->time must be intialized */
-  /* to zero before calling uv_update_time for the first time. */
+  /* To prevent uninitialized memory access, loop->time must be intialized
+   * to zero before calling uv_update_time for the first time.
+   */
   loop->time = 0;
   loop->last_tick_count = 0;
   uv_update_time(loop);
 
+  QUEUE_INIT(&loop->wq);
   QUEUE_INIT(&loop->handle_queue);
   QUEUE_INIT(&loop->active_reqs);
   loop->active_handles = 0;
@@ -159,6 +168,15 @@ int uv_loop_init(uv_loop_t* loop) {
   loop->timer_counter = 0;
   loop->stop_flag = 0;
 
+  if (uv_mutex_init(&loop->wq_mutex))
+    abort();
+
+  if (uv_async_init(loop, &loop->wq_async, uv__work_done))
+    abort();
+
+  uv__handle_unref(&loop->wq_async);
+  loop->wq_async.flags |= UV__HANDLE_INTERNAL;
+
   return 0;
 }
 
@@ -183,6 +201,31 @@ uv_loop_t* uv_default_loop(void) {
 }
 
 
+static void uv__loop_close(uv_loop_t* loop) {
+  /* close the async handle without needeing an extra loop iteration */
+  assert(!loop->wq_async.async_sent);
+  loop->wq_async.close_cb = NULL;
+  uv__handle_closing(&loop->wq_async);
+  uv__handle_close(&loop->wq_async);
+
+  if (loop != &uv_default_loop_) {
+    size_t i;
+    for (i = 0; i < ARRAY_SIZE(loop->poll_peer_sockets); i++) {
+      SOCKET sock = loop->poll_peer_sockets[i];
+      if (sock != 0 && sock != INVALID_SOCKET)
+        closesocket(sock);
+    }
+  }
+  /* TODO: cleanup default loop*/
+
+  uv_mutex_lock(&loop->wq_mutex);
+  assert(QUEUE_EMPTY(&loop->wq) && "thread pool work queue not empty!");
+  assert(!uv__has_active_reqs(loop));
+  uv_mutex_unlock(&loop->wq_mutex);
+  uv_mutex_destroy(&loop->wq_mutex);
+}
+
+
 int uv_loop_close(uv_loop_t* loop) {
   QUEUE* q;
   uv_handle_t* h;
@@ -193,15 +236,13 @@ int uv_loop_close(uv_loop_t* loop) {
     if (!(h->flags & UV__HANDLE_INTERNAL))
       return UV_EBUSY;
   }
-  if (loop != &uv_default_loop_) {
-    size_t i;
-    for (i = 0; i < ARRAY_SIZE(loop->poll_peer_sockets); i++) {
-      SOCKET sock = loop->poll_peer_sockets[i];
-      if (sock != 0 && sock != INVALID_SOCKET)
-        closesocket(sock);
-    }
-  }
-  /* TODO: cleanup default loop*/
+
+  uv__loop_close(loop);
+
+#ifndef NDEBUG
+  memset(loop, -1, sizeof(*loop));
+#endif
+
   return 0;
 }
 
@@ -224,7 +265,8 @@ uv_loop_t* uv_loop_new(void) {
 
 
 void uv_loop_delete(uv_loop_t* loop) {
-  assert(uv_loop_close(loop) == 0);
+  int err = uv_loop_close(loop);
+  assert(err == 0);
   if (loop != &uv_default_loop_)
     free(loop);
 }
@@ -236,22 +278,31 @@ int uv_backend_fd(const uv_loop_t* loop) {
 
 
 int uv_backend_timeout(const uv_loop_t* loop) {
-  return 0;
+  if (loop->stop_flag != 0)
+    return 0;
+
+  if (!uv__has_active_handles(loop) && !uv__has_active_reqs(loop))
+    return 0;
+
+  if (loop->pending_reqs_tail)
+    return 0;
+
+  if (loop->endgame_handles)
+    return 0;
+
+  if (loop->idle_handles)
+    return 0;
+
+  return uv__next_timeout(loop);
 }
 
 
-static void uv_poll(uv_loop_t* loop, int block) {
-  DWORD bytes, timeout;
+static void uv_poll(uv_loop_t* loop, DWORD timeout) {
+  DWORD bytes;
   ULONG_PTR key;
   OVERLAPPED* overlapped;
   uv_req_t* req;
 
-  if (block) {
-    timeout = uv_get_poll_timeout(loop);
-  } else {
-    timeout = 0;
-  }
-
   GetQueuedCompletionStatus(loop->iocp,
                             &bytes,
                             &key,
@@ -266,28 +317,22 @@ static void uv_poll(uv_loop_t* loop, int block) {
     /* Serious error */
     uv_fatal_error(GetLastError(), "GetQueuedCompletionStatus");
   } else {
-    /* We're sure that at least `timeout` milliseconds have expired, but */
-    /* this may not be reflected yet in the GetTickCount() return value. */
-    /* Therefore we ensure it's taken into account here. */
+    /* We're sure that at least `timeout` milliseconds have expired, but
+     * this may not be reflected yet in the GetTickCount() return value.
+     * Therefore we ensure it's taken into account here.
+     */
     uv__time_forward(loop, timeout);
   }
 }
 
 
-static void uv_poll_ex(uv_loop_t* loop, int block) {
+static void uv_poll_ex(uv_loop_t* loop, DWORD timeout) {
   BOOL success;
-  DWORD timeout;
   uv_req_t* req;
   OVERLAPPED_ENTRY overlappeds[128];
   ULONG count;
   ULONG i;
 
-  if (block) {
-    timeout = uv_get_poll_timeout(loop);
-  } else {
-    timeout = 0;
-  }
-
   success = pGetQueuedCompletionStatusEx(loop->iocp,
                                          overlappeds,
                                          ARRAY_SIZE(overlappeds),
@@ -305,9 +350,10 @@ static void uv_poll_ex(uv_loop_t* loop, int block) {
     /* Serious error */
     uv_fatal_error(GetLastError(), "GetQueuedCompletionStatusEx");
   } else if (timeout > 0) {
-    /* We're sure that at least `timeout` milliseconds have expired, but */
-    /* this may not be reflected yet in the GetTickCount() return value. */
-    /* Therefore we ensure it's taken into account here. */
+    /* We're sure that at least `timeout` milliseconds have expired, but
+     * this may not be reflected yet in the GetTickCount() return value.
+     * Therefore we ensure it's taken into account here.
+     */
     uv__time_forward(loop, timeout);
   }
 }
@@ -326,8 +372,9 @@ int uv_loop_alive(const uv_loop_t* loop) {
 
 
 int uv_run(uv_loop_t *loop, uv_run_mode mode) {
+  DWORD timeout;
   int r;
-  void (*poll)(uv_loop_t* loop, int block);
+  void (*poll)(uv_loop_t* loop, DWORD timeout);
 
   if (pGetQueuedCompletionStatusEx)
     poll = &uv_poll_ex;
@@ -346,13 +393,11 @@ int uv_run(uv_loop_t *loop, uv_run_mode mode) {
     uv_idle_invoke(loop);
     uv_prepare_invoke(loop);
 
-    (*poll)(loop, loop->idle_handles == NULL &&
-                  loop->pending_reqs_tail == NULL &&
-                  loop->endgame_handles == NULL &&
-                  !loop->stop_flag &&
-                  (loop->active_handles > 0 ||
-                   !QUEUE_EMPTY(&loop->active_reqs)) &&
-                  !(mode & UV_RUN_NOWAIT));
+    timeout = 0;
+    if ((mode & UV_RUN_NOWAIT) == 0)
+      timeout = uv_backend_timeout(loop);
+
+    (*poll)(loop, timeout);
 
     uv_check_invoke(loop);
     uv_process_endgames(loop);
diff --git a/deps/uv/src/win/error.c b/deps/uv/src/win/error.c
index 3162bc787f..5c5514736e 100644
--- a/deps/uv/src/win/error.c
+++ b/deps/uv/src/win/error.c
@@ -133,6 +133,7 @@ int uv_translate_sys_error(int sys_errno) {
     case ERROR_DIRECTORY:                   return UV_ENOENT;
     case ERROR_FILE_NOT_FOUND:              return UV_ENOENT;
     case ERROR_INVALID_NAME:                return UV_ENOENT;
+    case ERROR_INVALID_DRIVE:               return UV_ENOENT;
     case ERROR_INVALID_REPARSE_DATA:        return UV_ENOENT;
     case ERROR_MOD_NOT_FOUND:               return UV_ENOENT;
     case ERROR_PATH_NOT_FOUND:              return UV_ENOENT;
diff --git a/deps/uv/src/win/fs.c b/deps/uv/src/win/fs.c
index f31c0a2999..8b52e610f4 100644
--- a/deps/uv/src/win/fs.c
+++ b/deps/uv/src/win/fs.c
@@ -44,12 +44,8 @@
 
 #define QUEUE_FS_TP_JOB(loop, req)                                          \
   do {                                                                      \
-    if (!QueueUserWorkItem(&uv_fs_thread_proc,                              \
-                           req,                                             \
-                           WT_EXECUTEDEFAULT)) {                            \
-      return uv_translate_sys_error(GetLastError());                        \
-    }                                                                       \
     uv__req_register(loop, req);                                            \
+    uv__work_submit((loop), &(req)->work_req, uv__fs_work, uv__fs_done);    \
   } while (0)
 
 #define SET_REQ_RESULT(req, result_value)                                   \
@@ -232,11 +228,7 @@ INLINE static void uv_fs_req_init(uv_loop_t* loop, uv_fs_t* req,
   req->result = 0;
   req->ptr = NULL;
   req->path = NULL;
-
-  if (cb != NULL) {
-    req->cb = cb;
-    memset(&req->overlapped, 0, sizeof(req->overlapped));
-  }
+  req->cb = cb;
 }
 
 
@@ -729,6 +721,78 @@ void fs__mkdir(uv_fs_t* req) {
 }
 
 
+/* Some parts of the implementation were borrowed from glibc. */
+void fs__mkdtemp(uv_fs_t* req) {
+  static const WCHAR letters[] =
+    L"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+  size_t len;
+  WCHAR* template_part;
+  static uint64_t value;
+  unsigned int count;
+  int fd;
+
+  /* A lower bound on the number of temporary files to attempt to
+     generate. The maximum total number of temporary file names that
+     can exist for a given template is 62**6. It should never be
+     necessary to try all these combinations. Instead if a reasonable
+     number of names is tried (we define reasonable as 62**3) fail to
+     give the system administrator the chance to remove the problems. */
+#define ATTEMPTS_MIN (62 * 62 * 62)
+
+  /* The number of times to attempt to generate a temporary file. To
+     conform to POSIX, this must be no smaller than TMP_MAX. */
+#if ATTEMPTS_MIN < TMP_MAX
+  unsigned int attempts = TMP_MAX;
+#else
+  unsigned int attempts = ATTEMPTS_MIN;
+#endif
+
+  len = wcslen(req->pathw);
+  if (len < 6 || wcsncmp(&req->pathw[len - 6], L"XXXXXX", 6)) {
+    SET_REQ_UV_ERROR(req, UV_EINVAL, ERROR_INVALID_PARAMETER);
+    return;
+  }
+
+  /* This is where the Xs start. */
+  template_part = &req->pathw[len - 6];
+
+  /* Get some random data. */
+  value += uv_hrtime() ^ _getpid();
+
+  for (count = 0; count < attempts; value += 7777, ++count) {
+    uint64_t v = value;
+
+    /* Fill in the random bits. */
+    template_part[0] = letters[v % 62];
+    v /= 62;
+    template_part[1] = letters[v % 62];
+    v /= 62;
+    template_part[2] = letters[v % 62];
+    v /= 62;
+    template_part[3] = letters[v % 62];
+    v /= 62;
+    template_part[4] = letters[v % 62];
+    v /= 62;
+    template_part[5] = letters[v % 62];
+
+    fd = _wmkdir(req->pathw);
+
+    if (fd >= 0) {
+      len = strlen(req->path);
+      wcstombs((char*) req->path + len - 6, template_part, 6);
+      SET_REQ_RESULT(req, 0);
+      return;
+    } else if (errno != EEXIST) {
+      SET_REQ_RESULT(req, -1);
+      return;
+    }
+  }
+
+  /* We got out of the loop because we ran out of combinations to try. */
+  SET_REQ_RESULT(req, -1);
+}
+
+
 void fs__readdir(uv_fs_t* req) {
   WCHAR* pathw = req->pathw;
   size_t len = wcslen(pathw);
@@ -1401,7 +1465,7 @@ static void fs__create_junction(uv_fs_t* req, const WCHAR* path,
 
   /* Open the directory */
   handle = CreateFileW(new_path,
-                       GENERIC_ALL,
+                       GENERIC_WRITE,
                        0,
                        NULL,
                        OPEN_EXISTING,
@@ -1510,11 +1574,10 @@ static void fs__fchown(uv_fs_t* req) {
 }
 
 
-static DWORD WINAPI uv_fs_thread_proc(void* parameter) {
-  uv_fs_t* req = (uv_fs_t*) parameter;
-  uv_loop_t* loop = req->loop;
+static void uv__fs_work(struct uv__work* w) {
+  uv_fs_t* req;
 
-  assert(req != NULL);
+  req = container_of(w, uv_fs_t, work_req);
   assert(req->type == UV_FS);
 
 #define XX(uc, lc)  case UV_FS_##uc: fs__##lc(req); break;
@@ -1537,6 +1600,7 @@ static DWORD WINAPI uv_fs_thread_proc(void* parameter) {
     XX(UNLINK, unlink)
     XX(RMDIR, rmdir)
     XX(MKDIR, mkdir)
+    XX(MKDTEMP, mkdtemp)
     XX(RENAME, rename)
     XX(READDIR, readdir)
     XX(LINK, link)
@@ -1547,9 +1611,41 @@ static DWORD WINAPI uv_fs_thread_proc(void* parameter) {
     default:
       assert(!"bad uv_fs_type");
   }
+}
 
-  POST_COMPLETION_FOR_REQ(loop, req);
-  return 0;
+
+static void uv__fs_done(struct uv__work* w, int status) {
+  uv_fs_t* req;
+
+  req = container_of(w, uv_fs_t, work_req);
+  uv__req_unregister(req->loop, req);
+
+  if (status == UV_ECANCELED) {
+    assert(req->result == 0);
+    req->result = UV_ECANCELED;
+  }
+
+  if (req->cb != NULL)
+    req->cb(req);
+}
+
+
+void uv_fs_req_cleanup(uv_fs_t* req) {
+  if (req->flags & UV_FS_CLEANEDUP)
+    return;
+
+  if (req->flags & UV_FS_FREE_PATHS)
+    free(req->pathw);
+
+  if (req->flags & UV_FS_FREE_PTR)
+    free(req->ptr);
+
+  req->path = NULL;
+  req->pathw = NULL;
+  req->new_pathw = NULL;
+  req->ptr = NULL;
+
+  req->flags |= UV_FS_CLEANEDUP;
 }
 
 
@@ -1701,6 +1797,26 @@ int uv_fs_mkdir(uv_loop_t* loop, uv_fs_t* req, const char* path, int mode,
 }
 
 
+int uv_fs_mkdtemp(uv_loop_t* loop, uv_fs_t* req, const char* tpl,
+    uv_fs_cb cb) {
+  int err;
+
+  uv_fs_req_init(loop, req, UV_FS_MKDTEMP, cb);
+
+  err = fs__capture_path(loop, req, tpl, NULL, TRUE);
+  if (err)
+    return uv_translate_sys_error(err);
+
+  if (cb) {
+    QUEUE_FS_TP_JOB(loop, req);
+    return 0;
+  } else {
+    fs__mkdtemp(req);
+    return req->result;
+  }
+}
+
+
 int uv_fs_rmdir(uv_loop_t* loop, uv_fs_t* req, const char* path, uv_fs_cb cb) {
   int err;
 
@@ -2064,30 +2180,3 @@ int uv_fs_futime(uv_loop_t* loop, uv_fs_t* req, uv_file fd, double atime,
     return req->result;
   }
 }
-
-
-void uv_process_fs_req(uv_loop_t* loop, uv_fs_t* req) {
-  assert(req->cb);
-  uv__req_unregister(loop, req);
-  req->cb(req);
-}
-
-
-void uv_fs_req_cleanup(uv_fs_t* req) {
-  if (req->flags & UV_FS_CLEANEDUP)
-    return;
-
-  if (req->flags & UV_FS_FREE_PATHS)
-    free(req->pathw);
-
-  if (req->flags & UV_FS_FREE_PTR)
-    free(req->ptr);
-
-  req->path = NULL;
-  req->pathw = NULL;
-  req->new_pathw = NULL;
-  req->ptr = NULL;
-
-  req->flags |= UV_FS_CLEANEDUP;
-}
-
diff --git a/deps/uv/src/win/getaddrinfo.c b/deps/uv/src/win/getaddrinfo.c
index b87a933f0f..086200a9ea 100644
--- a/deps/uv/src/win/getaddrinfo.c
+++ b/deps/uv/src/win/getaddrinfo.c
@@ -56,25 +56,13 @@
 #define ALIGNED_SIZE(X)     ((((X) + 3) >> 2) << 2)
 
 
-/* getaddrinfo worker thread implementation */
-static DWORD WINAPI getaddrinfo_thread_proc(void* parameter) {
-  uv_getaddrinfo_t* req = (uv_getaddrinfo_t*) parameter;
-  uv_loop_t* loop = req->loop;
-  int ret;
-
-  assert(req != NULL);
-
-  /* call OS function on this thread */
-  ret = GetAddrInfoW(req->node,
-                     req->service,
-                     req->hints,
-                     &req->res);
-  req->retcode = ret;
-
-  /* post getaddrinfo completed */
-  POST_COMPLETION_FOR_REQ(loop, req);
+static void uv__getaddrinfo_work(struct uv__work* w) {
+  uv_getaddrinfo_t* req;
+  int err;
 
-  return 0;
+  req = container_of(w, uv_getaddrinfo_t, work_req);
+  err = GetAddrInfoW(req->node, req->service, req->hints, &req->res);
+  req->retcode = uv__getaddrinfo_translate_error(err);
 }
 
 
@@ -87,7 +75,8 @@ static DWORD WINAPI getaddrinfo_thread_proc(void* parameter) {
  * and copy all structs and referenced strings into the one block.
  * Each size calculation is adjusted to avoid unaligned pointers.
  */
-void uv_process_getaddrinfo_req(uv_loop_t* loop, uv_getaddrinfo_t* req) {
+static void uv__getaddrinfo_done(struct uv__work* w, int status) {
+  uv_getaddrinfo_t* req;
   int addrinfo_len = 0;
   int name_len = 0;
   size_t addrinfo_struct_len = ALIGNED_SIZE(sizeof(struct addrinfo));
@@ -95,7 +84,8 @@ void uv_process_getaddrinfo_req(uv_loop_t* loop, uv_getaddrinfo_t* req) {
   struct addrinfo* addrinfo_ptr;
   char* alloc_ptr = NULL;
   char* cur_ptr = NULL;
-  int err = 0;
+
+  req = container_of(w, uv_getaddrinfo_t, work_req);
 
   /* release input parameter memory */
   if (req->alloc != NULL) {
@@ -103,6 +93,16 @@ void uv_process_getaddrinfo_req(uv_loop_t* loop, uv_getaddrinfo_t* req) {
     req->alloc = NULL;
   }
 
+  if (status == UV_ECANCELED) {
+    assert(req->retcode == 0);
+    req->retcode = UV_EAI_CANCELED;
+    if (req->res != NULL) {
+        FreeAddrInfoW(req->res);
+        req->res = NULL;
+    }
+    goto complete;
+  }
+
   if (req->retcode == 0) {
     /* convert addrinfoW to addrinfo */
     /* first calculate required length */
@@ -113,7 +113,7 @@ void uv_process_getaddrinfo_req(uv_loop_t* loop, uv_getaddrinfo_t* req) {
       if (addrinfow_ptr->ai_canonname != NULL) {
         name_len = uv_utf16_to_utf8(addrinfow_ptr->ai_canonname, -1, NULL, 0);
         if (name_len == 0) {
-          err = uv_translate_sys_error(GetLastError());
+          req->retcode = uv_translate_sys_error(GetLastError());
           goto complete;
         }
         addrinfo_len += ALIGNED_SIZE(name_len);
@@ -178,11 +178,8 @@ void uv_process_getaddrinfo_req(uv_loop_t* loop, uv_getaddrinfo_t* req) {
         }
       }
     } else {
-      err = UV_EAI_MEMORY;
+      req->retcode = UV_EAI_MEMORY;
     }
-  } else {
-    /* GetAddrInfo failed */
-    err = uv__getaddrinfo_translate_error(req->retcode);
   }
 
   /* return memory to system */
@@ -192,10 +189,10 @@ void uv_process_getaddrinfo_req(uv_loop_t* loop, uv_getaddrinfo_t* req) {
   }
 
 complete:
-  uv__req_unregister(loop, req);
+  uv__req_unregister(req->loop, req);
 
   /* finally do callback with converted result */
-  req->getaddrinfo_cb(req, err, (struct addrinfo*)alloc_ptr);
+  req->getaddrinfo_cb(req, req->retcode, (struct addrinfo*)alloc_ptr);
 }
 
 
@@ -246,6 +243,7 @@ int uv_getaddrinfo(uv_loop_t* loop,
   req->res = NULL;
   req->type = UV_GETADDRINFO;
   req->loop = loop;
+  req->retcode = 0;
 
   /* calculate required memory size for all input values */
   if (node != NULL) {
@@ -323,13 +321,10 @@ int uv_getaddrinfo(uv_loop_t* loop,
     req->hints = NULL;
   }
 
-  /* Ask thread to run. Treat this as a long operation */
-  if (QueueUserWorkItem(&getaddrinfo_thread_proc,
-                        req,
-                        WT_EXECUTELONGFUNCTION) == 0) {
-    err = GetLastError();
-    goto error;
-  }
+  uv__work_submit(loop,
+                  &req->work_req,
+                  uv__getaddrinfo_work,
+                  uv__getaddrinfo_done);
 
   uv__req_register(loop, req);
 
diff --git a/deps/uv/src/win/getnameinfo.c b/deps/uv/src/win/getnameinfo.c
index 48eb16d8ca..45608dae85 100644
--- a/deps/uv/src/win/getnameinfo.c
+++ b/deps/uv/src/win/getnameinfo.c
@@ -27,23 +27,31 @@
 #include "internal.h"
 #include "req-inl.h"
 
-
-/* getnameinfo worker thread implementation */
-static DWORD WINAPI getnameinfo_thread_proc(void* parameter) {
-  uv_getnameinfo_t* req = (uv_getnameinfo_t*)parameter;
-  uv_loop_t* loop = req->loop;
+#ifndef GetNameInfo
+int WSAAPI GetNameInfoW(
+  const SOCKADDR *pSockaddr,
+  socklen_t SockaddrLength,
+  PWCHAR pNodeBuffer,
+  DWORD NodeBufferSize,
+  PWCHAR pServiceBuffer,
+  DWORD ServiceBufferSize,
+  INT Flags
+);
+#endif
+
+static void uv__getnameinfo_work(struct uv__work* w) {
+  uv_getnameinfo_t* req;
   WCHAR host[NI_MAXHOST];
   WCHAR service[NI_MAXSERV];
   int ret = 0;
 
-  assert(req != NULL);
-
+  req = container_of(w, uv_getnameinfo_t, work_req);
   ret = GetNameInfoW((struct sockaddr*)&req->storage,
                      sizeof(req->storage),
                      host,
-                     sizeof(host),
+                     ARRAY_SIZE(host),
                      service,
-                     sizeof(service),
+                     ARRAY_SIZE(service),
                      req->flags);
   req->retcode = uv__getaddrinfo_translate_error(ret);
 
@@ -65,30 +73,29 @@ static DWORD WINAPI getnameinfo_thread_proc(void* parameter) {
                       sizeof(req->service),
                       NULL,
                       NULL);
-
-  /* post getnameinfo completed */
-  POST_COMPLETION_FOR_REQ(loop, req);
-
-  return 0;
 }
 
 
 /*
 * Called from uv_run when complete.
 */
-void uv_process_getnameinfo_req(uv_loop_t* loop, uv_getnameinfo_t* req) {
+static void uv__getnameinfo_done(struct uv__work* w, int status) {
+  uv_getnameinfo_t* req;
   char* host;
   char* service;
 
-  if (req->retcode == 0) {
+  req = container_of(w, uv_getnameinfo_t, work_req);
+  uv__req_unregister(req->loop, req);
+  host = service = NULL;
+
+  if (status == UV_ECANCELED) {
+    assert(req->retcode == 0);
+    req->retcode = UV_EAI_CANCELED;
+  } else if (req->retcode == 0) {
     host = req->host;
     service = req->service;
-  } else {
-    host = NULL;
-    service = NULL;
   }
 
-  uv__req_unregister(loop, req);
   req->getnameinfo_cb(req, req->retcode, host, service);
 }
 
@@ -119,20 +126,18 @@ int uv_getnameinfo(uv_loop_t* loop,
   }
 
   uv_req_init(loop, (uv_req_t*)req);
+  uv__req_register(loop, req);
 
   req->getnameinfo_cb = getnameinfo_cb;
   req->flags = flags;
   req->type = UV_GETNAMEINFO;
   req->loop = loop;
+  req->retcode = 0;
 
-  /* Ask thread to run. Treat this as a long operation. */
-  if (QueueUserWorkItem(&getnameinfo_thread_proc,
-                        req,
-                        WT_EXECUTELONGFUNCTION) == 0) {
-    return uv_translate_sys_error(GetLastError());
-  }
-
-  uv__req_register(loop, req);
+  uv__work_submit(loop,
+                  &req->work_req,
+                  uv__getnameinfo_work,
+                  uv__getnameinfo_done);
 
   return 0;
 }
diff --git a/deps/uv/src/win/internal.h b/deps/uv/src/win/internal.h
index 83c4a66893..9eadb71235 100644
--- a/deps/uv/src/win/internal.h
+++ b/deps/uv/src/win/internal.h
@@ -31,13 +31,16 @@
 
 #ifdef _MSC_VER
 # define INLINE __inline
+# define UV_THREAD_LOCAL __declspec( thread )
 #else
 # define INLINE inline
+# define UV_THREAD_LOCAL __thread
 #endif
 
 
 #ifdef _DEBUG
-extern __declspec( thread ) int uv__crt_assert_enabled;
+
+extern UV_THREAD_LOCAL int uv__crt_assert_enabled;
 
 #define UV_BEGIN_DISABLE_CRT_ASSERT()                           \
   {                                                             \
@@ -72,7 +75,6 @@ extern __declspec( thread ) int uv__crt_assert_enabled;
 /* Used by streams and UDP handles. */
 #define UV_HANDLE_READING                       0x00000100
 #define UV_HANDLE_BOUND                         0x00000200
-#define UV_HANDLE_BIND_ERROR                    0x00000400
 #define UV_HANDLE_LISTENING                     0x00000800
 #define UV_HANDLE_CONNECTION                    0x00001000
 #define UV_HANDLE_CONNECTED                     0x00002000
@@ -122,6 +124,12 @@ extern __declspec( thread ) int uv__crt_assert_enabled;
 /*
  * TCP
  */
+
+typedef struct {
+  WSAPROTOCOL_INFOW socket_info;
+  int delayed_error;
+} uv__ipc_socket_info_ex;
+
 int uv_tcp_listen(uv_tcp_t* handle, int backlog, uv_connection_cb cb);
 int uv_tcp_accept(uv_tcp_t* server, uv_tcp_t* client);
 int uv_tcp_read_start(uv_tcp_t* handle, uv_alloc_cb alloc_cb,
@@ -140,7 +148,7 @@ void uv_process_tcp_connect_req(uv_loop_t* loop, uv_tcp_t* handle,
 void uv_tcp_close(uv_loop_t* loop, uv_tcp_t* tcp);
 void uv_tcp_endgame(uv_loop_t* loop, uv_tcp_t* handle);
 
-int uv_tcp_import(uv_tcp_t* tcp, WSAPROTOCOL_INFOW* socket_protocol_info,
+int uv_tcp_import(uv_tcp_t* tcp, uv__ipc_socket_info_ex* socket_info_ex,
     int tcp_connection);
 
 int uv_tcp_duplicate_socket(uv_tcp_t* handle, int pid,
@@ -231,7 +239,7 @@ void uv_poll_endgame(uv_loop_t* loop, uv_poll_t* handle);
  */
 void uv_timer_endgame(uv_loop_t* loop, uv_timer_t* handle);
 
-DWORD uv_get_poll_timeout(uv_loop_t* loop);
+DWORD uv__next_timeout(const uv_loop_t* loop);
 void uv__time_forward(uv_loop_t* loop, uint64_t msecs);
 void uv_process_timers(uv_loop_t* loop);
 
@@ -286,28 +294,9 @@ int uv_translate_sys_error(int sys_errno);
 
 
 /*
- * Getaddrinfo
- */
-void uv_process_getaddrinfo_req(uv_loop_t* loop, uv_getaddrinfo_t* req);
-
-
-/*
-* Getnameinfo
-*/
-void uv_process_getnameinfo_req(uv_loop_t* loop, uv_getnameinfo_t* req);
-
-
-/*
  * FS
  */
 void uv_fs_init();
-void uv_process_fs_req(uv_loop_t* loop, uv_fs_t* req);
-
-
-/*
- * Threadpool
- */
-void uv_process_work_req(uv_loop_t* loop, uv_work_t* req);
 
 
 /*
diff --git a/deps/uv/src/win/pipe.c b/deps/uv/src/win/pipe.c
index 2fcedde369..3bf2a220d0 100644
--- a/deps/uv/src/win/pipe.c
+++ b/deps/uv/src/win/pipe.c
@@ -35,10 +35,10 @@ typedef struct uv__ipc_queue_item_s uv__ipc_queue_item_t;
 
 struct uv__ipc_queue_item_s {
   /*
-   * NOTE: It is important for socket_info to be the first field,
+   * NOTE: It is important for socket_info_ex to be the first field,
    * because we will we assigning it to the pending_ipc_info.socket_info
    */
-  WSAPROTOCOL_INFOW socket_info;
+  uv__ipc_socket_info_ex socket_info_ex;
   QUEUE member;
   int tcp_connection;
 };
@@ -73,7 +73,7 @@ typedef struct {
 /* IPC frame, which contains an imported TCP socket stream. */
 typedef struct {
   uv_ipc_frame_header_t header;
-  WSAPROTOCOL_INFOW socket_info;
+  uv__ipc_socket_info_ex socket_info_ex;
 } uv_ipc_frame_uv_stream;
 
 static void eof_timer_init(uv_pipe_t* pipe);
@@ -230,7 +230,7 @@ static int uv_set_pipe_handle(uv_loop_t* loop,
   NTSTATUS nt_status;
   IO_STATUS_BLOCK io_status;
   FILE_MODE_INFORMATION mode_info;
-  DWORD mode = PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | PIPE_WAIT;
+  DWORD mode = PIPE_READMODE_BYTE | PIPE_WAIT;
   DWORD current_mode = 0;
   DWORD err = 0;
 
@@ -246,11 +246,9 @@ static int uv_set_pipe_handle(uv_loop_t* loop,
       if (!GetNamedPipeHandleState(pipeHandle, &current_mode, NULL, NULL,
                                    NULL, NULL, 0)) {
         return -1;
-      } else if (current_mode != mode) {
+      } else if (current_mode & PIPE_NOWAIT) {
         SetLastError(ERROR_ACCESS_DENIED);
         return -1;
-      } else {
-        duplex_flags &= ~UV_HANDLE_WRITABLE;
       }
     } else {
       /* If this returns ERROR_INVALID_PARAMETER we probably opened
@@ -410,7 +408,7 @@ void uv_pipe_endgame(uv_loop_t* loop, uv_pipe_t* handle) {
         socket = WSASocketW(FROM_PROTOCOL_INFO,
                             FROM_PROTOCOL_INFO,
                             FROM_PROTOCOL_INFO,
-                            &item->socket_info,
+                            &item->socket_info_ex.socket_info,
                             0,
                             WSA_FLAG_OVERLAPPED);
         free(item);
@@ -789,7 +787,7 @@ int uv_pipe_accept(uv_pipe_t* server, uv_stream_t* client) {
     item = QUEUE_DATA(q, uv__ipc_queue_item_t, member);
 
     err = uv_tcp_import((uv_tcp_t*)client,
-                        &item->socket_info,
+                        &item->socket_info_ex,
                         item->tcp_connection);
     if (err != 0)
       return err;
@@ -1134,10 +1132,13 @@ static int uv_pipe_write_impl(uv_loop_t* loop,
       tcp_send_handle = (uv_tcp_t*)send_handle;
 
       err = uv_tcp_duplicate_socket(tcp_send_handle, handle->ipc_pid,
-          &ipc_frame.socket_info);
+          &ipc_frame.socket_info_ex.socket_info);
       if (err) {
         return err;
       }
+
+      ipc_frame.socket_info_ex.delayed_error = tcp_send_handle->delayed_error;
+
       ipc_frame.header.flags |= UV_IPC_TCP_SERVER;
 
       if (tcp_send_handle->flags & UV_HANDLE_CONNECTION) {
@@ -1254,7 +1255,7 @@ static int uv_pipe_write_impl(uv_loop_t* loop,
     }
 
     /* Request queued by the kernel. */
-    req->queued_bytes = uv_count_bufs(bufs, nbufs);
+    req->queued_bytes = uv__count_bufs(bufs, nbufs);
     handle->write_queue_size += req->queued_bytes;
   } else if (handle->flags & UV_HANDLE_BLOCKING_WRITES) {
     /* Using overlapped IO, but wait for completion before returning */
@@ -1311,7 +1312,7 @@ static int uv_pipe_write_impl(uv_loop_t* loop,
       req->queued_bytes = 0;
     } else {
       /* Request queued by the kernel. */
-      req->queued_bytes = uv_count_bufs(bufs, nbufs);
+      req->queued_bytes = uv__count_bufs(bufs, nbufs);
       handle->write_queue_size += req->queued_bytes;
     }
 
@@ -1397,7 +1398,7 @@ static void uv_pipe_read_error_or_eof(uv_loop_t* loop, uv_pipe_t* handle,
 
 
 void uv__pipe_insert_pending_socket(uv_pipe_t* handle,
-                                    WSAPROTOCOL_INFOW* info,
+                                    uv__ipc_socket_info_ex* info,
                                     int tcp_connection) {
   uv__ipc_queue_item_t* item;
 
@@ -1405,7 +1406,7 @@ void uv__pipe_insert_pending_socket(uv_pipe_t* handle,
   if (item == NULL)
     uv_fatal_error(ERROR_OUTOFMEMORY, "malloc");
 
-  memcpy(&item->socket_info, info, sizeof(item->socket_info));
+  memcpy(&item->socket_info_ex, info, sizeof(item->socket_info_ex));
   item->tcp_connection = tcp_connection;
   QUEUE_INSERT_TAIL(&handle->pending_ipc_info.queue, &item->member);
   handle->pending_ipc_info.queue_len++;
@@ -1471,11 +1472,11 @@ void uv_process_pipe_read_req(uv_loop_t* loop, uv_pipe_t* handle,
 
           if (ipc_frame.header.flags & UV_IPC_TCP_SERVER) {
             assert(avail - sizeof(ipc_frame.header) >=
-              sizeof(ipc_frame.socket_info));
+              sizeof(ipc_frame.socket_info_ex));
 
             /* Read the TCP socket info. */
             if (!ReadFile(handle->handle,
-                          &ipc_frame.socket_info,
+                          &ipc_frame.socket_info_ex,
                           sizeof(ipc_frame) - sizeof(ipc_frame.header),
                           &bytes,
                           NULL)) {
@@ -1489,7 +1490,7 @@ void uv_process_pipe_read_req(uv_loop_t* loop, uv_pipe_t* handle,
             /* Store the pending socket info. */
             uv__pipe_insert_pending_socket(
                 handle,
-                &ipc_frame.socket_info,
+                &ipc_frame.socket_info_ex,
                 ipc_frame.header.flags & UV_IPC_TCP_CONNECTION);
           }
 
@@ -1772,7 +1773,34 @@ static void eof_timer_close_cb(uv_handle_t* handle) {
 
 int uv_pipe_open(uv_pipe_t* pipe, uv_file file) {
   HANDLE os_handle = uv__get_osfhandle(file);
-  DWORD duplex_flags = UV_HANDLE_READABLE | UV_HANDLE_WRITABLE;
+  NTSTATUS nt_status;
+  IO_STATUS_BLOCK io_status;
+  FILE_ACCESS_INFORMATION access;
+  DWORD duplex_flags = 0;
+
+  /* Determine what kind of permissions we have on this handle.
+   * Cygwin opens the pipe in message mode, but we can support it,
+   * just query the access flags and set the stream flags accordingly.
+   */
+  nt_status = pNtQueryInformationFile(os_handle,
+                                      &io_status,
+                                      &access,
+                                      sizeof(access),
+                                      FileAccessInformation);
+  if (nt_status != STATUS_SUCCESS)
+    return UV_EINVAL;
+
+  if (pipe->ipc) {
+    if (!(access.AccessFlags & FILE_WRITE_DATA) ||
+        !(access.AccessFlags & FILE_READ_DATA)) {
+      return UV_EINVAL;
+    }
+  }
+
+  if (access.AccessFlags & FILE_WRITE_DATA)
+    duplex_flags |= UV_HANDLE_WRITABLE;
+  if (access.AccessFlags & FILE_READ_DATA)
+    duplex_flags |= UV_HANDLE_READABLE;
 
   if (os_handle == INVALID_HANDLE_VALUE ||
       uv_set_pipe_handle(pipe->loop, pipe, os_handle, duplex_flags) == -1) {
diff --git a/deps/uv/src/win/process.c b/deps/uv/src/win/process.c
index 7a85858c56..40023e5572 100644
--- a/deps/uv/src/win/process.c
+++ b/deps/uv/src/win/process.c
@@ -25,6 +25,8 @@
 #include <stdlib.h>
 #include <signal.h>
 #include <limits.h>
+#include <malloc.h>
+#include <wchar.h>
 
 #include "uv.h"
 #include "internal.h"
@@ -36,14 +38,27 @@
 
 
 typedef struct env_var {
-  const char* narrow;
-  const WCHAR* wide;
-  size_t len; /* including null or '=' */
-  DWORD value_len;
-  int supplied;
+  const WCHAR* const wide;
+  const WCHAR* const wide_eq;
+  const size_t len; /* including null or '=' */
 } env_var_t;
 
-#define E_V(str) { str "=", L##str, sizeof(str), 0, 0 }
+#define E_V(str) { L##str, L##str L"=", sizeof(str) }
+
+static const env_var_t required_vars[] = { /* keep me sorted */
+  E_V("HOMEDRIVE"),
+  E_V("HOMEPATH"),
+  E_V("LOGONSERVER"),
+  E_V("PATH"),
+  E_V("SYSTEMDRIVE"),
+  E_V("SYSTEMROOT"),
+  E_V("TEMP"),
+  E_V("USERDOMAIN"),
+  E_V("USERNAME"),
+  E_V("USERPROFILE"),
+  E_V("WINDIR"),
+};
+static size_t n_required_vars = ARRAY_SIZE(required_vars);
 
 
 static HANDLE uv_global_job_handle_;
@@ -587,25 +602,56 @@ error:
 }
 
 
-/*
- * If we learn that people are passing in huge environment blocks
- * then we should probably qsort() the array and then bsearch()
- * to see if it contains this variable. But there are ownership
- * issues associated with that solution; this is the caller's
- * char**, and modifying it is rude.
- */
-static void check_required_vars_contains_var(env_var_t* required, int count,
-    const char* var) {
-  int i;
-  for (i = 0; i < count; ++i) {
-    if (_strnicmp(required[i].narrow, var, required[i].len) == 0) {
-      required[i].supplied =  1;
-      return;
+int env_strncmp(const wchar_t* a, int na, const wchar_t* b) {
+  wchar_t* a_eq;
+  wchar_t* b_eq;
+  wchar_t* A;
+  wchar_t* B;
+  int nb;
+  int r;
+
+  if (na < 0) {
+    a_eq = wcschr(a, L'=');
+    assert(a_eq);
+    na = (int)(long)(a_eq - a);
+  } else {
+    na--;
+  }
+  b_eq = wcschr(b, L'=');
+  assert(b_eq);
+  nb = b_eq - b;
+
+  A = alloca((na+1) * sizeof(wchar_t));
+  B = alloca((nb+1) * sizeof(wchar_t));
+
+  r = LCMapStringW(LOCALE_INVARIANT, LCMAP_UPPERCASE, a, na, A, na);
+  assert(r==na);
+  A[na] = L'\0';
+  r = LCMapStringW(LOCALE_INVARIANT, LCMAP_UPPERCASE, b, nb, B, nb);
+  assert(r==nb);
+  B[nb] = L'\0';
+
+  while (1) {
+    wchar_t AA = *A++;
+    wchar_t BB = *B++;
+    if (AA < BB) {
+      return -1;
+    } else if (AA > BB) {
+      return 1;
+    } else if (!AA && !BB) {
+      return 0;
     }
   }
 }
 
 
+static int qsort_wcscmp(const void *a, const void *b) {
+  wchar_t* astr = *(wchar_t* const*)a;
+  wchar_t* bstr = *(wchar_t* const*)b;
+  return env_strncmp(astr, -1, bstr);
+}
+
+
 /*
  * The way windows takes environment variables is different than what C does;
  * Windows wants a contiguous block of null-terminated strings, terminated
@@ -616,95 +662,171 @@ static void check_required_vars_contains_var(env_var_t* required, int count,
  * TEMP. SYSTEMDRIVE is probably also important. We therefore ensure that
  * these get defined if the input environment block does not contain any
  * values for them.
+ *
+ * Also add variables known to Cygwin to be required for correct
+ * subprocess operation in many cases:
+ * https://github.com/Alexpux/Cygwin/blob/b266b04fbbd3a595f02ea149e4306d3ab9b1fe3d/winsup/cygwin/environ.cc#L955
+ *
  */
 int make_program_env(char* env_block[], WCHAR** dst_ptr) {
   WCHAR* dst;
   WCHAR* ptr;
   char** env;
-  size_t env_len = 1; /* room for closing null */
+  size_t env_len = 0;
   int len;
   size_t i;
   DWORD var_size;
+  size_t env_block_count = 1; /* 1 for null-terminator */
+  WCHAR* dst_copy;
+  WCHAR** ptr_copy;
+  WCHAR** env_copy;
+  DWORD* required_vars_value_len = alloca(n_required_vars * sizeof(DWORD*));
 
-  env_var_t required_vars[] = {
-    E_V("SYSTEMROOT"),
-    E_V("SYSTEMDRIVE"),
-    E_V("TEMP"),
-  };
-
+  /* first pass: determine size in UTF-16 */
   for (env = env_block; *env; env++) {
     int len;
-    check_required_vars_contains_var(required_vars,
-                                     ARRAY_SIZE(required_vars),
-                                     *env);
-
-    len = MultiByteToWideChar(CP_UTF8,
-                              0,
-                              *env,
-                              -1,
-                              NULL,
-                              0);
-    if (len <= 0) {
-      return GetLastError();
+    if (strchr(*env, '=')) {
+      len = MultiByteToWideChar(CP_UTF8,
+                                0,
+                                *env,
+                                -1,
+                                NULL,
+                                0);
+      if (len <= 0) {
+        return GetLastError();
+      }
+      env_len += len;
+      env_block_count++;
     }
+  }
 
-    env_len += len;
+  /* second pass: copy to UTF-16 environment block */
+  dst_copy = _malloca(env_len * sizeof(WCHAR));
+  if (!dst_copy) {
+    return ERROR_OUTOFMEMORY;
   }
+  env_copy = alloca(env_block_count * sizeof(WCHAR*));
 
-  for (i = 0; i < ARRAY_SIZE(required_vars); ++i) {
-    if (!required_vars[i].supplied) {
-      env_len += required_vars[i].len;
+  ptr = dst_copy;
+  ptr_copy = env_copy;
+  for (env = env_block; *env; env++) {
+    if (strchr(*env, '=')) {
+      len = MultiByteToWideChar(CP_UTF8,
+                                0,
+                                *env,
+                                -1,
+                                ptr,
+                                (int) (env_len - (ptr - dst_copy)));
+      if (len <= 0) {
+        DWORD err = GetLastError();
+        _freea(dst_copy);
+        return err;
+      }
+      *ptr_copy++ = ptr;
+      ptr += len;
+    }
+  }
+  *ptr_copy = NULL;
+  assert(env_len == ptr - dst_copy);
+
+  /* sort our (UTF-16) copy */
+  qsort(env_copy, env_block_count-1, sizeof(wchar_t*), qsort_wcscmp);
+
+  /* third pass: check for required variables */
+  for (ptr_copy = env_copy, i = 0; i < n_required_vars; ) {
+    int cmp;
+    if (!*ptr_copy) {
+      cmp = -1;
+    } else {
+      cmp = env_strncmp(required_vars[i].wide_eq,
+                       required_vars[i].len,
+                        *ptr_copy);
+    }
+    if (cmp < 0) {
+      /* missing required var */
       var_size = GetEnvironmentVariableW(required_vars[i].wide, NULL, 0);
-      if (var_size == 0) {
-        return GetLastError();
+      required_vars_value_len[i] = var_size;
+      if (var_size != 0) {
+        env_len += required_vars[i].len;
+        env_len += var_size;
       }
-      required_vars[i].value_len = var_size;
-      env_len += var_size;
+      i++;
+    } else {
+      ptr_copy++;
+      if (cmp == 0)
+        i++;
     }
   }
 
-  dst = malloc(env_len * sizeof(WCHAR));
+  /* final pass: copy, in sort order, and inserting required variables */
+  dst = malloc((1+env_len) * sizeof(WCHAR));
   if (!dst) {
+    _freea(dst_copy);
     return ERROR_OUTOFMEMORY;
   }
 
-  ptr = dst;
-
-  for (env = env_block; *env; env++, ptr += len) {
-    len = MultiByteToWideChar(CP_UTF8,
-                              0,
-                              *env,
-                              -1,
-                              ptr,
-                              (int) (env_len - (ptr - dst)));
-    if (len <= 0) {
-      free(dst);
-      return GetLastError();
+  for (ptr = dst, ptr_copy = env_copy, i = 0;
+       *ptr_copy || i < n_required_vars;
+       ptr += len) {
+    int cmp;
+    if (i >= n_required_vars) {
+      cmp = 1;
+    } else if (!*ptr_copy) {
+      cmp = -1;
+    } else {
+      cmp = env_strncmp(required_vars[i].wide_eq,
+                        required_vars[i].len,
+                        *ptr_copy);
     }
-  }
-
-  for (i = 0; i < ARRAY_SIZE(required_vars); ++i) {
-    if (!required_vars[i].supplied) {
-      wcscpy(ptr, required_vars[i].wide);
-      ptr += required_vars[i].len - 1;
-      *ptr++ = L'=';
-      var_size = GetEnvironmentVariableW(required_vars[i].wide,
-                                         ptr,
-                                         required_vars[i].value_len);
-      if (var_size == 0) {
-        uv_fatal_error(GetLastError(), "GetEnvironmentVariableW");
+    if (cmp < 0) {
+      /* missing required var */
+      len = required_vars_value_len[i];
+      if (len) {
+        wcscpy(ptr, required_vars[i].wide_eq);
+        ptr += required_vars[i].len;
+        var_size = GetEnvironmentVariableW(required_vars[i].wide,
+                                           ptr,
+                                           (int) (env_len - (ptr - dst)));
+        if (var_size != len-1) { /* race condition? */
+          uv_fatal_error(GetLastError(), "GetEnvironmentVariableW");
+        }
       }
-      ptr += required_vars[i].value_len;
+      i++;
+    } else {
+      /* copy var from env_block */
+      DWORD r;
+      len = wcslen(*ptr_copy) + 1;
+      r = wmemcpy_s(ptr, (env_len - (ptr - dst)), *ptr_copy, len);
+      assert(!r);
+      ptr_copy++;
+      if (cmp == 0)
+        i++;
     }
   }
 
   /* Terminate with an extra NULL. */
+  assert(env_len == (ptr - dst));
   *ptr = L'\0';
 
+  _freea(dst_copy);
   *dst_ptr = dst;
   return 0;
 }
 
+/*
+ * Attempt to find the value of the PATH environment variable in the child's
+ * preprocessed environment.
+ *
+ * If found, a pointer into `env` is returned. If not found, NULL is returned.
+ */
+static WCHAR* find_path(WCHAR *env) {
+  for (; env != NULL && *env != 0; env += wcslen(env) + 1) {
+    if (wcsncmp(env, L"PATH=", 5) == 0)
+      return &env[5];
+  }
+
+  return NULL;
+}
 
 /*
  * Called on Windows thread-pool thread to indicate that
@@ -802,7 +924,7 @@ int uv_spawn(uv_loop_t* loop,
              const uv_process_options_t* options) {
   int i;
   int err = 0;
-  WCHAR* path = NULL;
+  WCHAR* path = NULL, *alloc_path = NULL;
   BOOL result;
   WCHAR* application_path = NULL, *application = NULL, *arguments = NULL,
          *env = NULL, *cwd = NULL;
@@ -876,7 +998,8 @@ int uv_spawn(uv_loop_t* loop,
   }
 
   /* Get PATH environment variable. */
-  {
+  path = find_path(env);
+  if (path == NULL) {
     DWORD path_len, r;
 
     path_len = GetEnvironmentVariableW(L"PATH", NULL, 0);
@@ -885,11 +1008,12 @@ int uv_spawn(uv_loop_t* loop,
       goto done;
     }
 
-    path = (WCHAR*) malloc(path_len * sizeof(WCHAR));
-    if (path == NULL) {
+    alloc_path = (WCHAR*) malloc(path_len * sizeof(WCHAR));
+    if (alloc_path == NULL) {
       err = ERROR_OUTOFMEMORY;
       goto done;
     }
+    path = alloc_path;
 
     r = GetEnvironmentVariableW(L"PATH", path, path_len);
     if (r == 0 || r >= path_len) {
@@ -1023,7 +1147,7 @@ int uv_spawn(uv_loop_t* loop,
   free(arguments);
   free(cwd);
   free(env);
-  free(path);
+  free(alloc_path);
 
   if (process->child_stdio_buffer != NULL) {
     /* Clean up child stdio handles. */
diff --git a/deps/uv/src/win/req-inl.h b/deps/uv/src/win/req-inl.h
index cbc2ba8e18..97342e5c7e 100644
--- a/deps/uv/src/win/req-inl.h
+++ b/deps/uv/src/win/req-inl.h
@@ -195,26 +195,10 @@ INLINE static void uv_process_reqs(uv_loop_t* loop) {
         uv_process_poll_req(loop, (uv_poll_t*) req->data, req);
         break;
 
-      case UV_GETADDRINFO:
-        uv_process_getaddrinfo_req(loop, (uv_getaddrinfo_t*) req);
-        break;
-
-      case UV_GETNAMEINFO:
-        uv_process_getnameinfo_req(loop, (uv_getnameinfo_t*)req);
-        break;
-
       case UV_PROCESS_EXIT:
         uv_process_proc_exit(loop, (uv_process_t*) req->data);
         break;
 
-      case UV_FS:
-        uv_process_fs_req(loop, (uv_fs_t*) req);
-        break;
-
-      case UV_WORK:
-        uv_process_work_req(loop, (uv_work_t*) req);
-        break;
-
       case UV_FS_EVENT_REQ:
         uv_process_fs_event_req(loop, req, (uv_fs_event_t*) req->data);
         break;
diff --git a/deps/uv/src/win/stream-inl.h b/deps/uv/src/win/stream-inl.h
index e4bf086368..97a6b90b50 100644
--- a/deps/uv/src/win/stream-inl.h
+++ b/deps/uv/src/win/stream-inl.h
@@ -53,15 +53,4 @@ INLINE static void uv_connection_init(uv_stream_t* handle) {
 }
 
 
-INLINE static size_t uv_count_bufs(const uv_buf_t bufs[], unsigned int nbufs) {
-  unsigned int i;
-  size_t bytes;
-
-  bytes = 0;
-  for (i = 0; i < nbufs; i++)
-    bytes += (size_t) bufs[i].len;
-
-  return bytes;
-}
-
 #endif /* UV_WIN_STREAM_INL_H_ */
diff --git a/deps/uv/src/win/tcp.c b/deps/uv/src/win/tcp.c
index ccd7a11e2c..a213ad63e7 100644
--- a/deps/uv/src/win/tcp.c
+++ b/deps/uv/src/win/tcp.c
@@ -156,6 +156,7 @@ int uv_tcp_init(uv_loop_t* loop, uv_tcp_t* handle) {
   handle->func_acceptex = NULL;
   handle->func_connectex = NULL;
   handle->processed_accepts = 0;
+  handle->delayed_error = 0;
 
   return 0;
 }
@@ -235,6 +236,17 @@ void uv_tcp_endgame(uv_loop_t* loop, uv_tcp_t* handle) {
 }
 
 
+/* Unlike on Unix, here we don't set SO_REUSEADDR, because it doesn't just
+ * allow binding to addresses that are in use by sockets in TIME_WAIT, it
+ * effectively allows 'stealing' a port which is in use by another application.
+ *
+ * SO_EXCLUSIVEADDRUSE is also not good here because it does cehck all sockets,
+ * regardless of state, so we'd get an error even if the port is in use by a
+ * socket in TIME_WAIT state.
+ *
+ * See issue #1360.
+ *
+ */
 static int uv_tcp_try_bind(uv_tcp_t* handle,
                            const struct sockaddr* addr,
                            unsigned int addrlen,
@@ -291,8 +303,7 @@ static int uv_tcp_try_bind(uv_tcp_t* handle,
     err = WSAGetLastError();
     if (err == WSAEADDRINUSE) {
       /* Some errors are not to be reported until connect() or listen() */
-      handle->bind_error = err;
-      handle->flags |= UV_HANDLE_BIND_ERROR;
+      handle->delayed_error = err;
     } else {
       return err;
     }
@@ -517,8 +528,8 @@ int uv_tcp_listen(uv_tcp_t* handle, int backlog, uv_connection_cb cb) {
     return WSAEISCONN;
   }
 
-  if (handle->flags & UV_HANDLE_BIND_ERROR) {
-    return handle->bind_error;
+  if (handle->delayed_error) {
+    return handle->delayed_error;
   }
 
   if (!(handle->flags & UV_HANDLE_BOUND)) {
@@ -528,6 +539,8 @@ int uv_tcp_listen(uv_tcp_t* handle, int backlog, uv_connection_cb cb) {
                           0);
     if (err)
       return err;
+    if (handle->delayed_error)
+      return handle->delayed_error;
   }
 
   if (!handle->func_acceptex) {
@@ -699,8 +712,8 @@ static int uv_tcp_try_connect(uv_connect_t* req,
   DWORD bytes;
   int err;
 
-  if (handle->flags & UV_HANDLE_BIND_ERROR) {
-    return handle->bind_error;
+  if (handle->delayed_error) {
+    return handle->delayed_error;
   }
 
   if (!(handle->flags & UV_HANDLE_BOUND)) {
@@ -714,6 +727,8 @@ static int uv_tcp_try_connect(uv_connect_t* req,
     err = uv_tcp_try_bind(handle, bind_addr, addrlen, 0);
     if (err)
       return err;
+    if (handle->delayed_error)
+      return handle->delayed_error;
   }
 
   if (!handle->func_connectex) {
@@ -762,8 +777,8 @@ int uv_tcp_getsockname(const uv_tcp_t* handle,
     return UV_EINVAL;
   }
 
-  if (handle->flags & UV_HANDLE_BIND_ERROR) {
-    return uv_translate_sys_error(handle->bind_error);
+  if (handle->delayed_error) {
+    return uv_translate_sys_error(handle->delayed_error);
   }
 
   result = getsockname(handle->socket, name, namelen);
@@ -784,8 +799,8 @@ int uv_tcp_getpeername(const uv_tcp_t* handle,
     return UV_EINVAL;
   }
 
-  if (handle->flags & UV_HANDLE_BIND_ERROR) {
-    return uv_translate_sys_error(handle->bind_error);
+  if (handle->delayed_error) {
+    return uv_translate_sys_error(handle->delayed_error);
   }
 
   result = getpeername(handle->socket, name, namelen);
@@ -839,7 +854,7 @@ int uv_tcp_write(uv_loop_t* loop,
     uv_insert_pending_req(loop, (uv_req_t*) req);
   } else if (UV_SUCCEEDED_WITH_IOCP(result == 0)) {
     /* Request queued by the kernel. */
-    req->queued_bytes = uv_count_bufs(bufs, nbufs);
+    req->queued_bytes = uv__count_bufs(bufs, nbufs);
     handle->reqs_pending++;
     handle->write_reqs_pending++;
     REGISTER_HANDLE_REQ(loop, handle, req);
@@ -1009,8 +1024,12 @@ void uv_process_tcp_write_req(uv_loop_t* loop, uv_tcp_t* handle,
   }
 
   if (req->cb) {
-    err = GET_REQ_SOCK_ERROR(req);
-    req->cb(req, uv_translate_sys_error(err));
+    err = uv_translate_sys_error(GET_REQ_SOCK_ERROR(req));
+    if (err == UV_ECONNABORTED) {
+      /* use UV_ECANCELED for consistency with Unix */
+      err = UV_ECANCELED;
+    }
+    req->cb(req, err);
   }
 
   handle->write_reqs_pending--;
@@ -1102,14 +1121,13 @@ void uv_process_tcp_connect_req(uv_loop_t* loop, uv_tcp_t* handle,
 }
 
 
-int uv_tcp_import(uv_tcp_t* tcp, WSAPROTOCOL_INFOW* socket_protocol_info,
+int uv_tcp_import(uv_tcp_t* tcp, uv__ipc_socket_info_ex* socket_info_ex,
     int tcp_connection) {
   int err;
-
   SOCKET socket = WSASocketW(FROM_PROTOCOL_INFO,
                              FROM_PROTOCOL_INFO,
                              FROM_PROTOCOL_INFO,
-                             socket_protocol_info,
+                             &socket_info_ex->socket_info,
                              0,
                              WSA_FLAG_OVERLAPPED);
 
@@ -1126,7 +1144,7 @@ int uv_tcp_import(uv_tcp_t* tcp, WSAPROTOCOL_INFOW* socket_protocol_info,
   err = uv_tcp_set_socket(tcp->loop,
                           tcp,
                           socket,
-                          socket_protocol_info->iAddressFamily,
+                          socket_info_ex->socket_info.iAddressFamily,
                           1);
   if (err) {
     closesocket(socket);
@@ -1141,6 +1159,8 @@ int uv_tcp_import(uv_tcp_t* tcp, WSAPROTOCOL_INFOW* socket_protocol_info,
   tcp->flags |= UV_HANDLE_BOUND;
   tcp->flags |= UV_HANDLE_SHARED_TCP_SOCKET;
 
+  tcp->delayed_error = socket_info_ex->delayed_error;
+
   tcp->loop->active_tcp_streams++;
   return 0;
 }
@@ -1201,13 +1221,10 @@ int uv_tcp_duplicate_socket(uv_tcp_t* handle, int pid,
         return ERROR_INVALID_PARAMETER;
       }
 
-      /* Report any deferred bind errors now. */
-      if (handle->flags & UV_HANDLE_BIND_ERROR) {
-        return handle->bind_error;
-      }
-
-      if (listen(handle->socket, SOMAXCONN) == SOCKET_ERROR) {
-        return WSAGetLastError();
+      if (!(handle->delayed_error)) {
+        if (listen(handle->socket, SOMAXCONN) == SOCKET_ERROR) {
+          handle->delayed_error = WSAGetLastError();
+        }
       }
     }
   }
diff --git a/deps/uv/src/win/threadpool.c b/deps/uv/src/win/threadpool.c
deleted file mode 100644
index 9539844c66..0000000000
--- a/deps/uv/src/win/threadpool.c
+++ /dev/null
@@ -1,81 +0,0 @@
-/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to
- * deal in the Software without restriction, including without limitation the
- * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
- * sell copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- */
-
-#include <assert.h>
-
-#include "uv.h"
-#include "internal.h"
-#include "req-inl.h"
-
-
-static void uv_work_req_init(uv_loop_t* loop, uv_work_t* req,
-    uv_work_cb work_cb, uv_after_work_cb after_work_cb) {
-  uv_req_init(loop, (uv_req_t*) req);
-  req->type = UV_WORK;
-  req->loop = loop;
-  req->work_cb = work_cb;
-  req->after_work_cb = after_work_cb;
-  memset(&req->overlapped, 0, sizeof(req->overlapped));
-}
-
-
-static DWORD WINAPI uv_work_thread_proc(void* parameter) {
-  uv_work_t* req = (uv_work_t*)parameter;
-  uv_loop_t* loop = req->loop;
-
-  assert(req != NULL);
-  assert(req->type == UV_WORK);
-  assert(req->work_cb);
-
-  req->work_cb(req);
-
-  POST_COMPLETION_FOR_REQ(loop, req);
-
-  return 0;
-}
-
-
-int uv_queue_work(uv_loop_t* loop, uv_work_t* req, uv_work_cb work_cb,
-    uv_after_work_cb after_work_cb) {
-  if (work_cb == NULL)
-    return UV_EINVAL;
-
-  uv_work_req_init(loop, req, work_cb, after_work_cb);
-
-  if (!QueueUserWorkItem(&uv_work_thread_proc, req, WT_EXECUTELONGFUNCTION)) {
-    return uv_translate_sys_error(GetLastError());
-  }
-
-  uv__req_register(loop, req);
-  return 0;
-}
-
-
-int uv_cancel(uv_req_t* req) {
-  return UV_ENOSYS;
-}
-
-
-void uv_process_work_req(uv_loop_t* loop, uv_work_t* req) {
-  uv__req_unregister(loop, req);
-  if(req->after_work_cb)
-    req->after_work_cb(req, 0);
-}
diff --git a/deps/uv/src/win/timer.c b/deps/uv/src/win/timer.c
index 16a2fc5f5f..c229d4c897 100644
--- a/deps/uv/src/win/timer.c
+++ b/deps/uv/src/win/timer.c
@@ -36,10 +36,11 @@ void uv_update_time(uv_loop_t* loop) {
 
   time.QuadPart = loop->time;
 
-  /* GetTickCount() can conceivably wrap around, so when the current tick */
-  /* count is lower than the last tick count, we'll assume it has wrapped. */
-  /* uv_poll must make sure that the timer can never overflow more than */
-  /* once between two subsequent uv_update_time calls. */
+  /* GetTickCount() can conceivably wrap around, so when the current tick
+   * count is lower than the last tick count, we'll assume it has wrapped.
+   * uv_poll must make sure that the timer can never overflow more than
+   * once between two subsequent uv_update_time calls.
+   */
   time.LowPart = ticks;
   if (ticks < loop->last_tick_count)
     time.HighPart++;
@@ -47,13 +48,14 @@ void uv_update_time(uv_loop_t* loop) {
   /* Remember the last tick count. */
   loop->last_tick_count = ticks;
 
-  /* The GetTickCount() resolution isn't too good. Sometimes it'll happen */
-  /* that GetQueuedCompletionStatus() or GetQueuedCompletionStatusEx() has */
-  /* waited for a couple of ms but this is not reflected in the GetTickCount */
-  /* result yet. Therefore whenever GetQueuedCompletionStatus times out */
-  /* we'll add the number of ms that it has waited to the current loop time. */
-  /* When that happened the loop time might be a little ms farther than what */
-  /* we've just computed, and we shouldn't update the loop time. */
+  /* The GetTickCount() resolution isn't too good. Sometimes it'll happen
+   * that GetQueuedCompletionStatus() or GetQueuedCompletionStatusEx() has
+   * waited for a couple of ms but this is not reflected in the GetTickCount
+   * result yet. Therefore whenever GetQueuedCompletionStatus times out
+   * we'll add the number of ms that it has waited to the current loop time.
+   * When that happened the loop time might be a little ms farther than what
+   * we've just computed, and we shouldn't update the loop time.
+   */
   if (loop->time < time.QuadPart)
     loop->time = time.QuadPart;
 }
@@ -193,24 +195,26 @@ uint64_t uv_timer_get_repeat(const uv_timer_t* handle) {
 }
 
 
-DWORD uv_get_poll_timeout(uv_loop_t* loop) {
+DWORD uv__next_timeout(const uv_loop_t* loop) {
   uv_timer_t* timer;
   int64_t delta;
 
-  /* Check if there are any running timers */
-  timer = RB_MIN(uv_timer_tree_s, &loop->timers);
+  /* Check if there are any running timers
+   * Need to cast away const first, since RB_MIN doesn't know what we are
+   * going to do with this return value, it can't be marked const
+   */
+  timer = RB_MIN(uv_timer_tree_s, &((uv_loop_t*)loop)->timers);
   if (timer) {
-    uv_update_time(loop);
-
     delta = timer->due - loop->time;
     if (delta >= UINT_MAX >> 1) {
-      /* A timeout value of UINT_MAX means infinite, so that's no good. But */
-      /* more importantly, there's always the risk that GetTickCount wraps. */
-      /* uv_update_time can detect this, but we must make sure that the */
-      /* tick counter never overflows twice between two subsequent */
-      /* uv_update_time calls. We do this by never sleeping more than half */
-      /* the time it takes to wrap  the counter - which is huge overkill, */
-      /* but hey, it's not so bad to wake up every 25 days. */
+      /* A timeout value of UINT_MAX means infinite, so that's no good. But
+       * more importantly, there's always the risk that GetTickCount wraps.
+       * uv_update_time can detect this, but we must make sure that the
+       * tick counter never overflows twice between two subsequent
+       * uv_update_time calls. We do this by never sleeping more than half
+       * the time it takes to wrap  the counter - which is huge overkill,
+       * but hey, it's not so bad to wake up every 25 days.
+       */
       return UINT_MAX >> 1;
     } else if (delta < 0) {
       /* Negative timeout values are not allowed */
diff --git a/deps/uv/src/win/tty.c b/deps/uv/src/win/tty.c
index 87e3eb5d8a..6b8297cbd9 100644
--- a/deps/uv/src/win/tty.c
+++ b/deps/uv/src/win/tty.c
@@ -30,6 +30,10 @@
 # include <stdint.h>
 #endif
 
+#ifndef COMMON_LVB_REVERSE_VIDEO
+# define COMMON_LVB_REVERSE_VIDEO 0x4000
+#endif
+
 #include "uv.h"
 #include "internal.h"
 #include "handle-inl.h"
diff --git a/deps/uv/src/win/udp.c b/deps/uv/src/win/udp.c
index 865890455a..ef63dd73df 100644
--- a/deps/uv/src/win/udp.c
+++ b/deps/uv/src/win/udp.c
@@ -37,8 +37,9 @@ const unsigned int uv_active_udp_streams_threshold = 0;
 /* A zero-size buffer for use by uv_udp_read */
 static char uv_zero_[] = "";
 
-int uv_udp_getsockname(uv_udp_t* handle, struct sockaddr* name,
-    int* namelen) {
+int uv_udp_getsockname(const uv_udp_t* handle,
+                       struct sockaddr* name,
+                       int* namelen) {
   int result;
 
   if (!(handle->flags & UV_HANDLE_BOUND)) {
@@ -129,6 +130,8 @@ int uv_udp_init(uv_loop_t* loop, uv_udp_t* handle) {
   handle->activecnt = 0;
   handle->func_wsarecv = WSARecv;
   handle->func_wsarecvfrom = WSARecvFrom;
+  handle->send_queue_size = 0;
+  handle->send_queue_count = 0;
 
   uv_req_init(loop, (uv_req_t*) &(handle->recv_req));
   handle->recv_req.type = UV_UDP_RECV;
@@ -396,12 +399,16 @@ static int uv__send(uv_udp_send_t* req,
     /* Request completed immediately. */
     req->queued_bytes = 0;
     handle->reqs_pending++;
+    handle->send_queue_size += req->queued_bytes;
+    handle->send_queue_count++;
     REGISTER_HANDLE_REQ(loop, handle, req);
     uv_insert_pending_req(loop, (uv_req_t*)req);
   } else if (UV_SUCCEEDED_WITH_IOCP(result == 0)) {
     /* Request queued by the kernel. */
-    req->queued_bytes = uv_count_bufs(bufs, nbufs);
+    req->queued_bytes = uv__count_bufs(bufs, nbufs);
     handle->reqs_pending++;
+    handle->send_queue_size += req->queued_bytes;
+    handle->send_queue_count++;
     REGISTER_HANDLE_REQ(loop, handle, req);
   } else {
     /* Send failed due to an error. */
@@ -524,6 +531,11 @@ void uv_process_udp_send_req(uv_loop_t* loop, uv_udp_t* handle,
 
   assert(handle->type == UV_UDP);
 
+  assert(handle->send_queue_size >= req->queued_bytes);
+  assert(handle->send_queue_count >= 1);
+  handle->send_queue_size -= req->queued_bytes;
+  handle->send_queue_count--;
+
   UNREGISTER_HANDLE_REQ(loop, handle, req);
 
   if (req->cb) {
@@ -860,3 +872,12 @@ int uv__udp_send(uv_udp_send_t* req,
 
   return 0;
 }
+
+
+int uv__udp_try_send(uv_udp_t* handle,
+                     const uv_buf_t bufs[],
+                     unsigned int nbufs,
+                     const struct sockaddr* addr,
+                     unsigned int addrlen) {
+  return UV_ENOSYS;
+}
diff --git a/deps/uv/test/run-tests.c b/deps/uv/test/run-tests.c
index cd50ee09f3..d8f3cda540 100644
--- a/deps/uv/test/run-tests.c
+++ b/deps/uv/test/run-tests.c
@@ -39,6 +39,7 @@
 int ipc_helper(int listen_after_write);
 int ipc_helper_tcp_connection(void);
 int ipc_send_recv_helper(void);
+int ipc_helper_bind_twice(void);
 int stdio_over_pipes_helper(void);
 
 static int maybe_run_test(int argc, char **argv);
@@ -82,6 +83,10 @@ static int maybe_run_test(int argc, char **argv) {
     return ipc_helper_tcp_connection();
   }
 
+  if (strcmp(argv[1], "ipc_helper_bind_twice") == 0) {
+    return ipc_helper_bind_twice();
+  }
+
   if (strcmp(argv[1], "stdio_over_pipes_helper") == 0) {
     return stdio_over_pipes_helper();
   }
diff --git a/deps/uv/test/test-barrier.c b/deps/uv/test/test-barrier.c
index 25a55d6cfe..dfd2dbdef1 100644
--- a/deps/uv/test/test-barrier.c
+++ b/deps/uv/test/test-barrier.c
@@ -41,10 +41,6 @@ static void worker(void* arg) {
     uv_sleep(c->delay);
 
   c->worker_barrier_wait_rval = uv_barrier_wait(&c->barrier);
-  if (c->worker_barrier_wait_rval == 1) {
-    uv_barrier_destroy(&c->barrier);
-    ASSERT(c->main_barrier_wait_rval == 0);
-  }
 }
 
 
@@ -53,21 +49,16 @@ TEST_IMPL(barrier_1) {
   worker_config wc;
 
   memset(&wc, 0, sizeof(wc));
-  wc.main_barrier_wait_rval = -1;
-  wc.worker_barrier_wait_rval = -1;
 
   ASSERT(0 == uv_barrier_init(&wc.barrier, 2));
   ASSERT(0 == uv_thread_create(&thread, worker, &wc));
 
   uv_sleep(100);
-
   wc.main_barrier_wait_rval = uv_barrier_wait(&wc.barrier);
-  if (wc.main_barrier_wait_rval == 1) {
-    uv_barrier_destroy(&wc.barrier);
-    ASSERT(wc.worker_barrier_wait_rval == 0);
-  }
 
   ASSERT(0 == uv_thread_join(&thread));
+  uv_barrier_destroy(&wc.barrier);
+
   ASSERT(1 == (wc.main_barrier_wait_rval ^ wc.worker_barrier_wait_rval));
 
   return 0;
@@ -80,19 +71,15 @@ TEST_IMPL(barrier_2) {
 
   memset(&wc, 0, sizeof(wc));
   wc.delay = 100;
-  wc.main_barrier_wait_rval = -1;
-  wc.worker_barrier_wait_rval = -1;
 
   ASSERT(0 == uv_barrier_init(&wc.barrier, 2));
   ASSERT(0 == uv_thread_create(&thread, worker, &wc));
 
   wc.main_barrier_wait_rval = uv_barrier_wait(&wc.barrier);
-  if (wc.main_barrier_wait_rval == 1) {
-    uv_barrier_destroy(&wc.barrier);
-    ASSERT(wc.worker_barrier_wait_rval == 0);
-  }
 
   ASSERT(0 == uv_thread_join(&thread));
+  uv_barrier_destroy(&wc.barrier);
+
   ASSERT(1 == (wc.main_barrier_wait_rval ^ wc.worker_barrier_wait_rval));
 
   return 0;
@@ -104,19 +91,15 @@ TEST_IMPL(barrier_3) {
   worker_config wc;
 
   memset(&wc, 0, sizeof(wc));
-  wc.main_barrier_wait_rval = -1;
-  wc.worker_barrier_wait_rval = -1;
 
   ASSERT(0 == uv_barrier_init(&wc.barrier, 2));
   ASSERT(0 == uv_thread_create(&thread, worker, &wc));
 
   wc.main_barrier_wait_rval = uv_barrier_wait(&wc.barrier);
-  if (wc.main_barrier_wait_rval == 1) {
-    uv_barrier_destroy(&wc.barrier);
-    ASSERT(wc.worker_barrier_wait_rval == 0);
-  }
 
   ASSERT(0 == uv_thread_join(&thread));
+  uv_barrier_destroy(&wc.barrier);
+
   ASSERT(1 == (wc.main_barrier_wait_rval ^ wc.worker_barrier_wait_rval));
 
   return 0;
diff --git a/deps/uv/test/test-fs.c b/deps/uv/test/test-fs.c
index 40c7726cad..4c6ccfab2c 100644
--- a/deps/uv/test/test-fs.c
+++ b/deps/uv/test/test-fs.c
@@ -65,6 +65,7 @@ static int read_cb_count;
 static int write_cb_count;
 static int unlink_cb_count;
 static int mkdir_cb_count;
+static int mkdtemp_cb_count;
 static int rmdir_cb_count;
 static int readdir_cb_count;
 static int stat_cb_count;
@@ -93,6 +94,8 @@ static uv_fs_t write_req;
 static uv_fs_t unlink_req;
 static uv_fs_t close_req;
 static uv_fs_t mkdir_req;
+static uv_fs_t mkdtemp_req1;
+static uv_fs_t mkdtemp_req2;
 static uv_fs_t rmdir_req;
 static uv_fs_t readdir_req;
 static uv_fs_t stat_req;
@@ -376,6 +379,32 @@ static void mkdir_cb(uv_fs_t* req) {
 }
 
 
+static void check_mkdtemp_result(uv_fs_t* req) {
+  int r;
+
+  ASSERT(req->fs_type == UV_FS_MKDTEMP);
+  ASSERT(req->result == 0);
+  ASSERT(req->path);
+  ASSERT(strlen(req->path) == 15);
+  ASSERT(memcmp(req->path, "test_dir_", 9) == 0);
+  ASSERT(memcmp(req->path + 9, "XXXXXX", 6) != 0);
+  check_permission(req->path, 0700);
+
+  /* Check if req->path is actually a directory */
+  r = uv_fs_stat(uv_default_loop(), &stat_req, req->path, NULL);
+  ASSERT(r == 0);
+  ASSERT(((uv_stat_t*)stat_req.ptr)->st_mode & S_IFDIR);
+  uv_fs_req_cleanup(&stat_req);
+}
+
+
+static void mkdtemp_cb(uv_fs_t* req) {
+  ASSERT(req == &mkdtemp_req1);
+  check_mkdtemp_result(req);
+  mkdtemp_cb_count++;
+}
+
+
 static void rmdir_cb(uv_fs_t* req) {
   ASSERT(req == &rmdir_req);
   ASSERT(req->fs_type == UV_FS_RMDIR);
@@ -927,6 +956,37 @@ TEST_IMPL(fs_async_sendfile) {
 }
 
 
+TEST_IMPL(fs_mkdtemp) {
+  int r;
+  const char* path_template = "test_dir_XXXXXX";
+
+  loop = uv_default_loop();
+
+  r = uv_fs_mkdtemp(loop, &mkdtemp_req1, path_template, mkdtemp_cb);
+  ASSERT(r == 0);
+
+  uv_run(loop, UV_RUN_DEFAULT);
+  ASSERT(mkdtemp_cb_count == 1);
+
+  /* sync mkdtemp */
+  r = uv_fs_mkdtemp(loop, &mkdtemp_req2, path_template, NULL);
+  ASSERT(r == 0);
+  check_mkdtemp_result(&mkdtemp_req2);
+
+  /* mkdtemp return different values on subsequent calls */
+  ASSERT(strcmp(mkdtemp_req1.path, mkdtemp_req2.path) != 0);
+
+  /* Cleanup */
+  rmdir(mkdtemp_req1.path);
+  rmdir(mkdtemp_req2.path);
+  uv_fs_req_cleanup(&mkdtemp_req1);
+  uv_fs_req_cleanup(&mkdtemp_req2);
+
+  MAKE_VALGRIND_HAPPY();
+  return 0;
+}
+
+
 TEST_IMPL(fs_fstat) {
   int r;
   uv_fs_t req;
@@ -985,6 +1045,13 @@ TEST_IMPL(fs_fstat) {
   ASSERT(s->st_birthtim.tv_nsec == t.st_birthtimespec.tv_nsec);
   ASSERT(s->st_flags == t.st_flags);
   ASSERT(s->st_gen == t.st_gen);
+#elif defined(_AIX)
+  ASSERT(s->st_atim.tv_sec == t.st_atime);
+  ASSERT(s->st_atim.tv_nsec == 0);
+  ASSERT(s->st_mtim.tv_sec == t.st_mtime);
+  ASSERT(s->st_mtim.tv_nsec == 0);
+  ASSERT(s->st_ctim.tv_sec == t.st_ctime);
+  ASSERT(s->st_ctim.tv_nsec == 0);
 #elif defined(__sun) || \
       defined(_BSD_SOURCE) || \
       defined(_SVID_SOURCE) || \
diff --git a/deps/uv/test/test-getsockname.c b/deps/uv/test/test-getsockname.c
index a67d967f0b..565c17fe50 100644
--- a/deps/uv/test/test-getsockname.c
+++ b/deps/uv/test/test-getsockname.c
@@ -353,6 +353,9 @@ TEST_IMPL(getsockname_udp) {
 
   ASSERT(getsocknamecount == 2);
 
+  ASSERT(udp.send_queue_size == 0);
+  ASSERT(udpServer.send_queue_size == 0);
+
   MAKE_VALGRIND_HAPPY();
   return 0;
 }
diff --git a/deps/uv/test/test-ipc.c b/deps/uv/test/test-ipc.c
index 61b649b66c..ed8c4dd7f0 100644
--- a/deps/uv/test/test-ipc.c
+++ b/deps/uv/test/test-ipc.c
@@ -27,6 +27,7 @@
 
 static uv_pipe_t channel;
 static uv_tcp_t tcp_server;
+static uv_tcp_t tcp_server2;
 static uv_tcp_t tcp_connection;
 
 static int exit_cb_called;
@@ -38,8 +39,6 @@ static int local_conn_accepted;
 static int remote_conn_accepted;
 static int tcp_server_listening;
 static uv_write_t write_req;
-static uv_pipe_t channel;
-static uv_tcp_t tcp_server;
 static uv_write_t conn_notify_req;
 static int close_cb_called;
 static int connection_accepted;
@@ -205,6 +204,71 @@ static void on_read(uv_stream_t* handle,
   free(buf->base);
 }
 
+#ifdef _WIN32
+static void on_read_listen_after_bound_twice(uv_stream_t* handle,
+                                             ssize_t nread,
+                                             const uv_buf_t* buf) {
+  int r;
+  uv_pipe_t* pipe;
+  uv_handle_type pending;
+
+  pipe = (uv_pipe_t*) handle;
+
+  if (nread == 0) {
+    /* Everything OK, but nothing read. */
+    free(buf->base);
+    return;
+  }
+
+  if (nread < 0) {
+    if (nread == UV_EOF) {
+      free(buf->base);
+      return;
+    }
+
+    printf("error recving on channel: %s\n", uv_strerror(nread));
+    abort();
+  }
+
+  fprintf(stderr, "got %d bytes\n", (int)nread);
+
+  ASSERT(uv_pipe_pending_count(pipe) > 0);
+  pending = uv_pipe_pending_type(pipe);
+  ASSERT(nread > 0 && buf->base && pending != UV_UNKNOWN_HANDLE);
+  read_cb_called++;
+
+  if (read_cb_called == 1) {
+    /* Accept the first TCP server, and start listening on it. */
+    ASSERT(pending == UV_TCP);
+    r = uv_tcp_init(uv_default_loop(), &tcp_server);
+    ASSERT(r == 0);
+    
+    r = uv_accept((uv_stream_t*)pipe, (uv_stream_t*)&tcp_server);
+    ASSERT(r == 0);
+    
+    r = uv_listen((uv_stream_t*)&tcp_server, 12, on_connection);
+    ASSERT(r == 0); 
+  } else if (read_cb_called == 2) {
+    /* Accept the second TCP server, and start listening on it. */
+    ASSERT(pending == UV_TCP);
+    r = uv_tcp_init(uv_default_loop(), &tcp_server2);
+    ASSERT(r == 0);
+    
+    r = uv_accept((uv_stream_t*)pipe, (uv_stream_t*)&tcp_server2);
+    ASSERT(r == 0);
+    
+    r = uv_listen((uv_stream_t*)&tcp_server2, 12, on_connection);
+    ASSERT(r == UV_EADDRINUSE);
+
+    uv_close((uv_handle_t*)&tcp_server, NULL);
+    uv_close((uv_handle_t*)&tcp_server2, NULL);
+    ASSERT(0 == uv_pipe_pending_count(pipe));
+    uv_close((uv_handle_t*)&channel, NULL);
+  }
+
+  free(buf->base);
+}
+#endif
 
 void spawn_helper(uv_pipe_t* channel,
                   uv_process_t* process,
@@ -424,6 +488,13 @@ TEST_IMPL(listen_no_simultaneous_accepts) {
   MAKE_VALGRIND_HAPPY();
   return 0;
 }
+
+TEST_IMPL(ipc_listen_after_bind_twice) {
+  int r = run_ipc_test("ipc_helper_bind_twice", on_read_listen_after_bound_twice);
+  ASSERT(read_cb_called == 2);
+  ASSERT(exit_cb_called == 1);
+  return r;
+}
 #endif
 
 
@@ -608,7 +679,7 @@ int ipc_helper(int listen_after_write) {
 
 int ipc_helper_tcp_connection(void) {
   /*
-   * This is launched from test-ipc.c. stdin is a duplex channel that we
+   * This is launched from test-ipc.c. stdin is a duplex channel
    * over which a handle will be transmitted.
    */
 
@@ -657,3 +728,51 @@ int ipc_helper_tcp_connection(void) {
   MAKE_VALGRIND_HAPPY();
   return 0;
 }
+
+int ipc_helper_bind_twice(void) {
+  /*
+   * This is launched from test-ipc.c. stdin is a duplex channel
+   * over which two handles will be transmitted.
+   */
+  struct sockaddr_in addr;
+  uv_write_t write_req;
+  uv_write_t write_req2;
+  int r;
+  uv_buf_t buf;
+
+  ASSERT(0 == uv_ip4_addr("0.0.0.0", TEST_PORT, &addr));
+
+  r = uv_pipe_init(uv_default_loop(), &channel, 1);
+  ASSERT(r == 0);
+
+  uv_pipe_open(&channel, 0);
+
+  ASSERT(1 == uv_is_readable((uv_stream_t*) &channel));
+  ASSERT(1 == uv_is_writable((uv_stream_t*) &channel));
+  ASSERT(0 == uv_is_closing((uv_handle_t*) &channel));
+
+  buf = uv_buf_init("hello\n", 6);
+
+  r = uv_tcp_init(uv_default_loop(), &tcp_server);
+  ASSERT(r == 0);
+  r = uv_tcp_init(uv_default_loop(), &tcp_server2);
+  ASSERT(r == 0);
+
+  r = uv_tcp_bind(&tcp_server, (const struct sockaddr*) &addr, 0);
+  ASSERT(r == 0);
+  r = uv_tcp_bind(&tcp_server2, (const struct sockaddr*) &addr, 0);
+  ASSERT(r == 0);
+
+  r = uv_write2(&write_req, (uv_stream_t*)&channel, &buf, 1,
+                (uv_stream_t*)&tcp_server, NULL);
+  ASSERT(r == 0);
+  r = uv_write2(&write_req2, (uv_stream_t*)&channel, &buf, 1,
+                (uv_stream_t*)&tcp_server2, NULL);
+  ASSERT(r == 0);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT(r == 0);
+  
+  MAKE_VALGRIND_HAPPY();
+  return 0;
+}
diff --git a/deps/uv/test/test-list.h b/deps/uv/test/test-list.h
index 15c2e4ed38..6dbe22307e 100644
--- a/deps/uv/test/test-list.h
+++ b/deps/uv/test/test-list.h
@@ -28,6 +28,7 @@ TEST_DECLARE   (loop_alive)
 TEST_DECLARE   (loop_close)
 TEST_DECLARE   (loop_stop)
 TEST_DECLARE   (loop_update_time)
+TEST_DECLARE   (loop_backend_timeout)
 TEST_DECLARE   (barrier_1)
 TEST_DECLARE   (barrier_2)
 TEST_DECLARE   (barrier_3)
@@ -56,6 +57,7 @@ TEST_DECLARE   (delayed_accept)
 TEST_DECLARE   (multiple_listen)
 TEST_DECLARE   (tcp_writealot)
 TEST_DECLARE   (tcp_try_write)
+TEST_DECLARE   (tcp_write_queue_order)
 TEST_DECLARE   (tcp_open)
 TEST_DECLARE   (tcp_connect_error_after_write)
 TEST_DECLARE   (tcp_shutdown_after_write)
@@ -71,7 +73,9 @@ TEST_DECLARE   (tcp_connect_error_fault)
 TEST_DECLARE   (tcp_connect_timeout)
 TEST_DECLARE   (tcp_close_while_connecting)
 TEST_DECLARE   (tcp_close)
+#ifndef _WIN32
 TEST_DECLARE   (tcp_close_accept)
+#endif
 TEST_DECLARE   (tcp_flags)
 TEST_DECLARE   (tcp_write_to_half_open_connection)
 TEST_DECLARE   (tcp_unexpected_read)
@@ -84,6 +88,7 @@ TEST_DECLARE   (tcp_bind6_localhost_ok)
 TEST_DECLARE   (udp_bind)
 TEST_DECLARE   (udp_bind_reuseaddr)
 TEST_DECLARE   (udp_send_and_recv)
+TEST_DECLARE   (udp_send_immediate)
 TEST_DECLARE   (udp_multicast_join)
 TEST_DECLARE   (udp_multicast_join6)
 TEST_DECLARE   (udp_multicast_ttl)
@@ -95,6 +100,7 @@ TEST_DECLARE   (udp_ipv6_only)
 TEST_DECLARE   (udp_options)
 TEST_DECLARE   (udp_no_autobind)
 TEST_DECLARE   (udp_open)
+TEST_DECLARE   (udp_try_send)
 TEST_DECLARE   (pipe_bind_error_addrinuse)
 TEST_DECLARE   (pipe_bind_error_addrnotavail)
 TEST_DECLARE   (pipe_bind_error_inval)
@@ -186,6 +192,7 @@ TEST_DECLARE   (spawn_stdout_to_file)
 TEST_DECLARE   (spawn_stdout_and_stderr_to_file)
 TEST_DECLARE   (spawn_auto_unref)
 TEST_DECLARE   (spawn_closed_process_io)
+TEST_DECLARE   (spawn_reads_child_path)
 TEST_DECLARE   (fs_poll)
 TEST_DECLARE   (fs_poll_getpath)
 TEST_DECLARE   (kill)
@@ -197,6 +204,7 @@ TEST_DECLARE   (fs_file_sync)
 TEST_DECLARE   (fs_file_write_null_buffer)
 TEST_DECLARE   (fs_async_dir)
 TEST_DECLARE   (fs_async_sendfile)
+TEST_DECLARE   (fs_mkdtemp)
 TEST_DECLARE   (fs_fstat)
 TEST_DECLARE   (fs_chmod)
 TEST_DECLARE   (fs_chown)
@@ -254,6 +262,7 @@ TEST_DECLARE   (listen_with_simultaneous_accepts)
 TEST_DECLARE   (listen_no_simultaneous_accepts)
 TEST_DECLARE   (fs_stat_root)
 TEST_DECLARE   (spawn_with_an_odd_path)
+TEST_DECLARE   (ipc_listen_after_bind_twice)
 #else
 TEST_DECLARE   (emfile)
 TEST_DECLARE   (close_fd)
@@ -286,6 +295,7 @@ TASK_LIST_START
   TEST_ENTRY  (loop_close)
   TEST_ENTRY  (loop_stop)
   TEST_ENTRY  (loop_update_time)
+  TEST_ENTRY  (loop_backend_timeout)
   TEST_ENTRY  (barrier_1)
   TEST_ENTRY  (barrier_2)
   TEST_ENTRY  (barrier_3)
@@ -330,6 +340,8 @@ TASK_LIST_START
 
   TEST_ENTRY  (tcp_try_write)
 
+  TEST_ENTRY  (tcp_write_queue_order)
+
   TEST_ENTRY  (tcp_open)
   TEST_HELPER (tcp_open, tcp4_echo_server)
 
@@ -349,7 +361,9 @@ TASK_LIST_START
   TEST_ENTRY  (tcp_connect_timeout)
   TEST_ENTRY  (tcp_close_while_connecting)
   TEST_ENTRY  (tcp_close)
+#ifndef _WIN32
   TEST_ENTRY  (tcp_close_accept)
+#endif
   TEST_ENTRY  (tcp_flags)
   TEST_ENTRY  (tcp_write_to_half_open_connection)
   TEST_ENTRY  (tcp_unexpected_read)
@@ -366,6 +380,7 @@ TASK_LIST_START
   TEST_ENTRY  (udp_bind)
   TEST_ENTRY  (udp_bind_reuseaddr)
   TEST_ENTRY  (udp_send_and_recv)
+  TEST_ENTRY  (udp_send_immediate)
   TEST_ENTRY  (udp_dgram_too_big)
   TEST_ENTRY  (udp_dual_stack)
   TEST_ENTRY  (udp_ipv6_only)
@@ -376,6 +391,7 @@ TASK_LIST_START
   TEST_ENTRY  (udp_multicast_join)
   TEST_ENTRY  (udp_multicast_join6)
   TEST_ENTRY  (udp_multicast_ttl)
+  TEST_ENTRY  (udp_try_send)
 
   TEST_ENTRY  (udp_open)
   TEST_HELPER (udp_open, udp4_echo_server)
@@ -505,6 +521,7 @@ TASK_LIST_START
   TEST_ENTRY  (spawn_stdout_and_stderr_to_file)
   TEST_ENTRY  (spawn_auto_unref)
   TEST_ENTRY  (spawn_closed_process_io)
+  TEST_ENTRY  (spawn_reads_child_path)
   TEST_ENTRY  (fs_poll)
   TEST_ENTRY  (fs_poll_getpath)
   TEST_ENTRY  (kill)
@@ -518,6 +535,7 @@ TASK_LIST_START
   TEST_ENTRY  (listen_no_simultaneous_accepts)
   TEST_ENTRY  (fs_stat_root)
   TEST_ENTRY  (spawn_with_an_odd_path)
+  TEST_ENTRY  (ipc_listen_after_bind_twice)
 #else
   TEST_ENTRY  (emfile)
   TEST_ENTRY  (close_fd)
@@ -541,6 +559,7 @@ TASK_LIST_START
   TEST_ENTRY  (fs_file_write_null_buffer)
   TEST_ENTRY  (fs_async_dir)
   TEST_ENTRY  (fs_async_sendfile)
+  TEST_ENTRY  (fs_mkdtemp)
   TEST_ENTRY  (fs_fstat)
   TEST_ENTRY  (fs_chmod)
   TEST_ENTRY  (fs_chown)
diff --git a/deps/uv/test/test-loop-time.c b/deps/uv/test/test-loop-time.c
index 49dc79b2c3..a2db42ccee 100644
--- a/deps/uv/test/test-loop-time.c
+++ b/deps/uv/test/test-loop-time.c
@@ -30,5 +30,34 @@ TEST_IMPL(loop_update_time) {
   while (uv_now(uv_default_loop()) - start < 1000)
     ASSERT(0 == uv_run(uv_default_loop(), UV_RUN_NOWAIT));
 
+  MAKE_VALGRIND_HAPPY();
+  return 0;
+}
+
+static void cb(uv_timer_t* timer) {
+  uv_close((uv_handle_t*)timer, NULL);
+}
+
+TEST_IMPL(loop_backend_timeout) {
+  uv_loop_t *loop = uv_default_loop();
+  uv_timer_t timer;
+  int r;
+
+  r = uv_timer_init(loop, &timer);
+  ASSERT(r == 0);
+
+  ASSERT(!uv_loop_alive(loop));
+  ASSERT(uv_backend_timeout(loop) == 0);
+
+  r = uv_timer_start(&timer, cb, 1000, 0); /* 1 sec */
+  ASSERT(r == 0);
+  ASSERT(uv_backend_timeout(loop) > 100); /* 0.1 sec */
+  ASSERT(uv_backend_timeout(loop) <= 1000); /* 1 sec */
+
+  r = uv_run(loop, UV_RUN_DEFAULT);
+  ASSERT(r == 0);
+  ASSERT(uv_backend_timeout(loop) == 0);
+
+  MAKE_VALGRIND_HAPPY();
   return 0;
 }
diff --git a/deps/uv/test/test-spawn.c b/deps/uv/test/test-spawn.c
index c75f1ca2fd..57f0862f94 100644
--- a/deps/uv/test/test-spawn.c
+++ b/deps/uv/test/test-spawn.c
@@ -31,6 +31,7 @@
 #  include <basetyps.h>
 # endif
 # include <shellapi.h>
+# include <wchar.h>
 #else
 # include <unistd.h>
 #endif
@@ -897,45 +898,110 @@ TEST_IMPL(environment_creation) {
     "SYSTEM=ROOT", /* substring of a supplied var name */
     "SYSTEMROOTED=OMG", /* supplied var name is a substring */
     "TEMP=C:\\Temp",
+    "INVALID",
     "BAZ=QUX",
+    "B_Z=QUX",
+    "B\xe2\x82\xacZ=QUX",
+    "B\xf0\x90\x80\x82Z=QUX",
+    "B\xef\xbd\xa1Z=QUX",
+    "B\xf0\xa3\x91\x96Z=QUX",
+    "BAZ", /* repeat, invalid variable */
     NULL
   };
-
-  WCHAR expected[512];
-  WCHAR* ptr = expected;
+  WCHAR* wenvironment[] = {
+    L"BAZ=QUX",
+    L"B_Z=QUX",
+    L"B\x20acZ=QUX",
+    L"B\xd800\xdc02Z=QUX",
+    L"B\xd84d\xdc56Z=QUX",
+    L"B\xff61Z=QUX",
+    L"FOO=BAR",
+    L"SYSTEM=ROOT", /* substring of a supplied var name */
+    L"SYSTEMROOTED=OMG", /* supplied var name is a substring */
+    L"TEMP=C:\\Temp",
+  };
+  WCHAR* from_env[] = {
+    /* list should be kept in sync with list
+     * in process.c, minus variables in wenvironment */
+    L"HOMEDRIVE",
+    L"HOMEPATH",
+    L"LOGONSERVER",
+    L"PATH",
+    L"USERDOMAIN",
+    L"USERNAME",
+    L"USERPROFILE",
+    L"SYSTEMDRIVE",
+    L"SYSTEMROOT",
+    L"WINDIR",
+    /* test for behavior in the absence of a
+     * required-environment variable: */
+    L"ZTHIS_ENV_VARIABLE_DOES_NOT_EXIST",
+  };
+  int found_in_loc_env[ARRAY_SIZE(wenvironment)] = {0};
+  int found_in_usr_env[ARRAY_SIZE(from_env)] = {0};
+  WCHAR *expected[ARRAY_SIZE(from_env)];
   int result;
   WCHAR* str;
+  WCHAR* prev;
   WCHAR* env;
 
-  for (i = 0; i < sizeof(environment) / sizeof(environment[0]) - 1; i++) {
-    ptr += uv_utf8_to_utf16(environment[i],
-                            ptr,
-                            expected + sizeof(expected) - ptr);
+  for (i = 0; i < ARRAY_SIZE(from_env); i++) {
+      /* copy expected additions to environment locally */
+      size_t len = GetEnvironmentVariableW(from_env[i], NULL, 0);
+      if (len == 0) {
+        found_in_usr_env[i] = 1;
+        str = malloc(1 * sizeof(WCHAR));
+        *str = 0;
+        expected[i] = str;
+      } else {
+        size_t name_len = wcslen(from_env[i]);
+        str = malloc((name_len+1+len) * sizeof(WCHAR));
+        wmemcpy(str, from_env[i], name_len);
+        expected[i] = str;
+        str += name_len;
+        *str++ = L'=';
+        GetEnvironmentVariableW(from_env[i], str, len);
+     }
   }
 
-  memcpy(ptr, L"SYSTEMROOT=", sizeof(L"SYSTEMROOT="));
-  ptr += sizeof(L"SYSTEMROOT=")/sizeof(WCHAR) - 1;
-  ptr += GetEnvironmentVariableW(L"SYSTEMROOT",
-                                 ptr,
-                                 expected + sizeof(expected) - ptr);
-  ++ptr;
-
-  memcpy(ptr, L"SYSTEMDRIVE=", sizeof(L"SYSTEMDRIVE="));
-  ptr += sizeof(L"SYSTEMDRIVE=")/sizeof(WCHAR) - 1;
-  ptr += GetEnvironmentVariableW(L"SYSTEMDRIVE",
-                                 ptr,
-                                 expected + sizeof(expected) - ptr);
-  ++ptr;
-  *ptr = '\0';
-
   result = make_program_env(environment, &env);
   ASSERT(result == 0);
 
-  for (str = env; *str; str += wcslen(str) + 1) {
-    wprintf(L"%s\n", str);
+  for (str = env, prev = NULL; *str; prev = str, str += wcslen(str) + 1) {
+    int found = 0;
+#if 0
+    _cputws(str);
+    putchar('\n');
+#endif
+    for (i = 0; i < ARRAY_SIZE(wenvironment) && !found; i++) {
+      if (!wcscmp(str, wenvironment[i])) {
+        ASSERT(!found_in_loc_env[i]);
+        found_in_loc_env[i] = 1;
+        found = 1;
+      }
+    }
+    for (i = 0; i < ARRAY_SIZE(expected) && !found; i++) {
+      if (!wcscmp(str, expected[i])) {
+        ASSERT(!found_in_usr_env[i]);
+        found_in_usr_env[i] = 1;
+        found = 1;
+      }
+    }
+    if (prev) { /* verify sort order -- requires Vista */
+#if _WIN32_WINNT >= 0x0600
+      ASSERT(CompareStringOrdinal(prev, -1, str, -1, TRUE) == 1);
+#endif
+    }
+    ASSERT(found); /* verify that we expected this variable */
   }
 
-  ASSERT(wcscmp(expected, env) == 0);
+  /* verify that we found all expected variables */
+  for (i = 0; i < ARRAY_SIZE(wenvironment); i++) {
+    ASSERT(found_in_loc_env[i]);
+  }
+  for (i = 0; i < ARRAY_SIZE(expected); i++) {
+    ASSERT(found_in_usr_env[i]);
+  }
 
   return 0;
 }
@@ -1225,3 +1291,38 @@ TEST_IMPL(closed_fd_events) {
   return 0;
 }
 #endif  /* !_WIN32 */
+
+TEST_IMPL(spawn_reads_child_path) {
+  int r;
+  int len;
+  char path[1024];
+  char *env[2] = {path, NULL};
+
+  /* Set up the process, but make sure that the file to run is relative and */
+  /* requires a lookup into PATH */
+  init_process_options("spawn_helper1", exit_cb);
+  options.file = "run-tests";
+  args[0] = "run-tests";
+
+  /* Set up the PATH env variable */
+  for (len = strlen(exepath);
+       exepath[len - 1] != '/' && exepath[len - 1] != '\\';
+       len--);
+  exepath[len] = 0;
+  strcpy(path, "PATH=");
+  strcpy(path + 5, exepath);
+
+  options.env = env;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT(r == 0);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT(r == 0);
+
+  ASSERT(exit_cb_called == 1);
+  ASSERT(close_cb_called == 1);
+
+  MAKE_VALGRIND_HAPPY();
+  return 0;
+}
diff --git a/deps/uv/test/test-tcp-close-accept.c b/deps/uv/test/test-tcp-close-accept.c
index 10f9d91964..5517aaf99e 100644
--- a/deps/uv/test/test-tcp-close-accept.c
+++ b/deps/uv/test/test-tcp-close-accept.c
@@ -19,6 +19,9 @@
  * IN THE SOFTWARE.
  */
 
+/* this test is Unix only */
+#ifndef _WIN32
+
 #include "uv.h"
 #include "task.h"
 
@@ -181,3 +184,5 @@ TEST_IMPL(tcp_close_accept) {
   MAKE_VALGRIND_HAPPY();
   return 0;
 }
+
+#endif  /* !_WIN32 */
diff --git a/deps/uv/test/test-tcp-try-write.c b/deps/uv/test/test-tcp-try-write.c
index 00341e4169..baff6cf36c 100644
--- a/deps/uv/test/test-tcp-try-write.c
+++ b/deps/uv/test/test-tcp-try-write.c
@@ -54,21 +54,19 @@ static void close_cb(uv_handle_t* handle) {
 
 
 static void connect_cb(uv_connect_t* req, int status) {
-  static char zeroes[1024];
   int r;
   uv_buf_t buf;
   ASSERT(status == 0);
   connect_cb_called++;
 
   do {
-    buf = uv_buf_init(zeroes, sizeof(zeroes));
+    buf = uv_buf_init("PING", 4);
     r = uv_try_write((uv_stream_t*) &client, &buf, 1);
-    ASSERT(r >= 0);
-    bytes_written += r;
-
-    /* Partial write */
-    if (r != (int) sizeof(zeroes))
+    ASSERT(r > 0 || r == UV_EAGAIN);
+    if (r > 0) {
+      bytes_written += r;
       break;
+    }
   } while (1);
   uv_close((uv_handle_t*) &client, close_cb);
 }
diff --git a/deps/uv/test/test-tcp-write-queue-order.c b/deps/uv/test/test-tcp-write-queue-order.c
new file mode 100644
index 0000000000..18e1f192b6
--- /dev/null
+++ b/deps/uv/test/test-tcp-write-queue-order.c
@@ -0,0 +1,137 @@
+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "uv.h"
+#include "task.h"
+
+#define REQ_COUNT 100000
+
+static uv_timer_t timer;
+static uv_tcp_t server;
+static uv_tcp_t client;
+static uv_tcp_t incoming;
+static int connect_cb_called;
+static int close_cb_called;
+static int connection_cb_called;
+static int write_callbacks;
+static int write_cancelled_callbacks;
+static int write_error_callbacks;
+
+static uv_write_t write_requests[REQ_COUNT];
+
+
+static void close_cb(uv_handle_t* handle) {
+  close_cb_called++;
+}
+
+void timer_cb(uv_timer_t* handle) {
+  uv_close((uv_handle_t*) &client, close_cb);
+  uv_close((uv_handle_t*) &server, close_cb);
+  uv_close((uv_handle_t*) &incoming, close_cb);
+}
+
+void write_cb(uv_write_t* req, int status) {
+  if (status == 0)
+    write_callbacks++;
+  else if (status == UV_ECANCELED)
+    write_cancelled_callbacks++;
+  else
+    write_error_callbacks++;
+}
+
+static void connect_cb(uv_connect_t* req, int status) {
+  static char base[1024];
+  int r;
+  int i;
+  uv_buf_t buf;
+
+  ASSERT(status == 0);
+  connect_cb_called++;
+
+  buf = uv_buf_init(base, sizeof(base));
+
+  for (i = 0; i < REQ_COUNT; i++) {
+    r = uv_write(&write_requests[i],
+                 req->handle,
+                 &buf,
+                 1,
+                 write_cb);
+    ASSERT(r == 0);
+  }
+}
+
+
+static void connection_cb(uv_stream_t* tcp, int status) {
+  ASSERT(status == 0);
+
+  ASSERT(0 == uv_tcp_init(tcp->loop, &incoming));
+  ASSERT(0 == uv_accept(tcp, (uv_stream_t*) &incoming));
+
+  connection_cb_called++;
+}
+
+
+static void start_server(void) {
+  struct sockaddr_in addr;
+
+  ASSERT(0 == uv_ip4_addr("0.0.0.0", TEST_PORT, &addr));
+
+  ASSERT(0 == uv_tcp_init(uv_default_loop(), &server));
+  ASSERT(0 == uv_tcp_bind(&server, (struct sockaddr*) &addr, 0));
+  ASSERT(0 == uv_listen((uv_stream_t*) &server, 128, connection_cb));
+}
+
+
+TEST_IMPL(tcp_write_queue_order) {
+  uv_connect_t connect_req;
+  struct sockaddr_in addr;
+
+  start_server();
+
+  ASSERT(0 == uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
+
+  ASSERT(0 == uv_tcp_init(uv_default_loop(), &client));
+  ASSERT(0 == uv_tcp_connect(&connect_req,
+                             &client,
+                             (struct sockaddr*) &addr,
+                             connect_cb));
+
+  ASSERT(0 == uv_timer_init(uv_default_loop(), &timer));
+  ASSERT(0 == uv_timer_start(&timer, timer_cb, 100, 0));
+
+  ASSERT(0 == uv_run(uv_default_loop(), UV_RUN_DEFAULT));
+
+  ASSERT(connect_cb_called == 1);
+  ASSERT(connection_cb_called == 1);
+  ASSERT(write_callbacks > 0);
+  ASSERT(write_cancelled_callbacks > 0);
+  ASSERT(write_callbacks +
+         write_error_callbacks +
+         write_cancelled_callbacks == REQ_COUNT);
+  ASSERT(close_cb_called == 3);
+
+  MAKE_VALGRIND_HAPPY();
+  return 0;
+}
diff --git a/deps/uv/test/test-udp-multicast-interface.c b/deps/uv/test/test-udp-multicast-interface.c
index 643df31802..f0679c578e 100644
--- a/deps/uv/test/test-udp-multicast-interface.c
+++ b/deps/uv/test/test-udp-multicast-interface.c
@@ -91,6 +91,9 @@ TEST_IMPL(udp_multicast_interface) {
   ASSERT(sv_send_cb_called == 1);
   ASSERT(close_cb_called == 1);
 
+  ASSERT(client.send_queue_size == 0);
+  ASSERT(server.send_queue_size == 0);
+
   MAKE_VALGRIND_HAPPY();
   return 0;
 }
diff --git a/deps/uv/test/test-udp-open.c b/deps/uv/test/test-udp-open.c
index 9a97303f12..b2b6117784 100644
--- a/deps/uv/test/test-udp-open.c
+++ b/deps/uv/test/test-udp-open.c
@@ -159,6 +159,8 @@ TEST_IMPL(udp_open) {
   ASSERT(send_cb_called == 1);
   ASSERT(close_cb_called == 1);
 
+  ASSERT(client.send_queue_size == 0);
+
   MAKE_VALGRIND_HAPPY();
   return 0;
 }
diff --git a/deps/uv/test/test-udp-send-and-recv.c b/deps/uv/test/test-udp-send-and-recv.c
index 3020ded7bf..633a16727b 100644
--- a/deps/uv/test/test-udp-send-and-recv.c
+++ b/deps/uv/test/test-udp-send-and-recv.c
@@ -206,6 +206,9 @@ TEST_IMPL(udp_send_and_recv) {
   ASSERT(sv_recv_cb_called == 1);
   ASSERT(close_cb_called == 2);
 
+  ASSERT(client.send_queue_size == 0);
+  ASSERT(server.send_queue_size == 0);
+
   MAKE_VALGRIND_HAPPY();
   return 0;
 }
diff --git a/deps/uv/test/test-udp-send-immediate.c b/deps/uv/test/test-udp-send-immediate.c
new file mode 100644
index 0000000000..0999f6b342
--- /dev/null
+++ b/deps/uv/test/test-udp-send-immediate.c
@@ -0,0 +1,148 @@
+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "uv.h"
+#include "task.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define CHECK_HANDLE(handle) \
+  ASSERT((uv_udp_t*)(handle) == &server || (uv_udp_t*)(handle) == &client)
+
+static uv_udp_t server;
+static uv_udp_t client;
+
+static int cl_send_cb_called;
+static int sv_recv_cb_called;
+static int close_cb_called;
+
+
+static void alloc_cb(uv_handle_t* handle,
+                     size_t suggested_size,
+                     uv_buf_t* buf) {
+  static char slab[65536];
+  CHECK_HANDLE(handle);
+  ASSERT(suggested_size <= sizeof(slab));
+  buf->base = slab;
+  buf->len = sizeof(slab);
+}
+
+
+static void close_cb(uv_handle_t* handle) {
+  CHECK_HANDLE(handle);
+  ASSERT(1 == uv_is_closing(handle));
+  close_cb_called++;
+}
+
+
+static void cl_send_cb(uv_udp_send_t* req, int status) {
+  ASSERT(req != NULL);
+  ASSERT(status == 0);
+  CHECK_HANDLE(req->handle);
+
+  cl_send_cb_called++;
+}
+
+
+static void sv_recv_cb(uv_udp_t* handle,
+                       ssize_t nread,
+                       const uv_buf_t* rcvbuf,
+                       const struct sockaddr* addr,
+                       unsigned flags) {
+  if (nread < 0) {
+    ASSERT(0 && "unexpected error");
+  }
+
+  if (nread == 0) {
+    /* Returning unused buffer */
+    /* Don't count towards sv_recv_cb_called */
+    ASSERT(addr == NULL);
+    return;
+  }
+
+  CHECK_HANDLE(handle);
+  ASSERT(flags == 0);
+
+  ASSERT(addr != NULL);
+  ASSERT(nread == 4);
+  ASSERT(memcmp("PING", rcvbuf->base, nread) == 0 ||
+         memcmp("PANG", rcvbuf->base, nread) == 0);
+
+  if (++sv_recv_cb_called == 2) {
+    uv_close((uv_handle_t*) &server, close_cb);
+    uv_close((uv_handle_t*) &client, close_cb);
+  }
+}
+
+
+TEST_IMPL(udp_send_immediate) {
+  struct sockaddr_in addr;
+  uv_udp_send_t req1, req2;
+  uv_buf_t buf;
+  int r;
+
+  ASSERT(0 == uv_ip4_addr("0.0.0.0", TEST_PORT, &addr));
+
+  r = uv_udp_init(uv_default_loop(), &server);
+  ASSERT(r == 0);
+
+  r = uv_udp_bind(&server, (const struct sockaddr*) &addr, 0);
+  ASSERT(r == 0);
+
+  r = uv_udp_recv_start(&server, alloc_cb, sv_recv_cb);
+  ASSERT(r == 0);
+
+  ASSERT(0 == uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
+
+  r = uv_udp_init(uv_default_loop(), &client);
+  ASSERT(r == 0);
+
+  /* client sends "PING", then "PANG" */
+  buf = uv_buf_init("PING", 4);
+
+  r = uv_udp_send(&req1,
+                  &client,
+                  &buf,
+                  1,
+                  (const struct sockaddr*) &addr,
+                  cl_send_cb);
+  ASSERT(r == 0);
+
+  buf = uv_buf_init("PANG", 4);
+
+  r = uv_udp_send(&req2,
+                  &client,
+                  &buf,
+                  1,
+                  (const struct sockaddr*) &addr,
+                  cl_send_cb);
+
+  uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+
+  ASSERT(cl_send_cb_called == 2);
+  ASSERT(sv_recv_cb_called == 2);
+  ASSERT(close_cb_called == 2);
+
+  MAKE_VALGRIND_HAPPY();
+  return 0;
+}
diff --git a/deps/uv/test/test-udp-try-send.c b/deps/uv/test/test-udp-try-send.c
new file mode 100644
index 0000000000..7b6de36548
--- /dev/null
+++ b/deps/uv/test/test-udp-try-send.c
@@ -0,0 +1,133 @@
+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "uv.h"
+#include "task.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef _WIN32
+
+TEST_IMPL(udp_try_send) {
+
+  MAKE_VALGRIND_HAPPY();
+  return 0;
+}
+
+#else  /* !_WIN32 */
+
+#define CHECK_HANDLE(handle) \
+  ASSERT((uv_udp_t*)(handle) == &server || (uv_udp_t*)(handle) == &client)
+
+static uv_udp_t server;
+static uv_udp_t client;
+
+static int sv_recv_cb_called;
+
+static int close_cb_called;
+
+
+static void alloc_cb(uv_handle_t* handle,
+                     size_t suggested_size,
+                     uv_buf_t* buf) {
+  static char slab[65536];
+  CHECK_HANDLE(handle);
+  ASSERT(suggested_size <= sizeof(slab));
+  buf->base = slab;
+  buf->len = sizeof(slab);
+}
+
+
+static void close_cb(uv_handle_t* handle) {
+  CHECK_HANDLE(handle);
+  ASSERT(uv_is_closing(handle));
+  close_cb_called++;
+}
+
+
+static void sv_recv_cb(uv_udp_t* handle,
+                       ssize_t nread,
+                       const uv_buf_t* rcvbuf,
+                       const struct sockaddr* addr,
+                       unsigned flags) {
+  ASSERT(nread > 0);
+
+  if (nread == 0) {
+    ASSERT(addr == NULL);
+    return;
+  }
+
+  ASSERT(nread == 4);
+  ASSERT(addr != NULL);
+
+  ASSERT(memcmp("EXIT", rcvbuf->base, nread) == 0);
+  uv_close((uv_handle_t*) handle, close_cb);
+  uv_close((uv_handle_t*) &client, close_cb);
+
+  sv_recv_cb_called++;
+}
+
+
+TEST_IMPL(udp_try_send) {
+  struct sockaddr_in addr;
+  static char buffer[64 * 1024];
+  uv_buf_t buf;
+  int r;
+
+  ASSERT(0 == uv_ip4_addr("0.0.0.0", TEST_PORT, &addr));
+
+  r = uv_udp_init(uv_default_loop(), &server);
+  ASSERT(r == 0);
+
+  r = uv_udp_bind(&server, (const struct sockaddr*) &addr, 0);
+  ASSERT(r == 0);
+
+  r = uv_udp_recv_start(&server, alloc_cb, sv_recv_cb);
+  ASSERT(r == 0);
+
+  ASSERT(0 == uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
+
+  r = uv_udp_init(uv_default_loop(), &client);
+  ASSERT(r == 0);
+
+  buf = uv_buf_init(buffer, sizeof(buffer));
+  r = uv_udp_try_send(&client, &buf, 1, (const struct sockaddr*) &addr);
+  ASSERT(r == UV_EMSGSIZE);
+
+  buf = uv_buf_init("EXIT", 4);
+  r = uv_udp_try_send(&client, &buf, 1, (const struct sockaddr*) &addr);
+  ASSERT(r == 4);
+
+  uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+
+  ASSERT(close_cb_called == 2);
+  ASSERT(sv_recv_cb_called == 1);
+
+  ASSERT(client.send_queue_size == 0);
+  ASSERT(server.send_queue_size == 0);
+
+  MAKE_VALGRIND_HAPPY();
+  return 0;
+}
+
+#endif  /* !_WIN32 */
diff --git a/deps/uv/test/test-watcher-cross-stop.c b/deps/uv/test/test-watcher-cross-stop.c
index 9284a1291f..bf765cb00c 100644
--- a/deps/uv/test/test-watcher-cross-stop.c
+++ b/deps/uv/test/test-watcher-cross-stop.c
@@ -91,7 +91,7 @@ TEST_IMPL(watcher_cross_stop) {
   for (i = 0; i < ARRAY_SIZE(sockets); i++)
     uv_close((uv_handle_t*) &sockets[i], close_cb);
 
-  ASSERT(0 < recv_cb_called && recv_cb_called <= ARRAY_SIZE(sockets));
+  ASSERT(recv_cb_called > 0);
   ASSERT(ARRAY_SIZE(sockets) == send_cb_called);
 
   uv_run(loop, UV_RUN_DEFAULT);
diff --git a/deps/uv/uv.gyp b/deps/uv/uv.gyp
index 147fc06c3a..5b4d69a924 100644
--- a/deps/uv/uv.gyp
+++ b/deps/uv/uv.gyp
@@ -61,11 +61,13 @@
         'include/uv.h',
         'include/tree.h',
         'include/uv-errno.h',
+        'include/uv-threadpool.h',
         'include/uv-version.h',
         'src/fs-poll.c',
         'src/heap-inl.h',
         'src/inet.c',
         'src/queue.h',
+        'src/threadpool.c',
         'src/uv-common.c',
         'src/uv-common.h',
         'src/version.c'
@@ -103,7 +105,6 @@
             'src/win/stream-inl.h',
             'src/win/tcp.c',
             'src/win/tty.c',
-            'src/win/threadpool.c',
             'src/win/timer.c',
             'src/win/udp.c',
             'src/win/util.c',
@@ -114,11 +115,11 @@
           ],
           'link_settings': {
             'libraries': [
-              '-ladvapi32.lib',
-              '-liphlpapi.lib',
-              '-lpsapi.lib',
-              '-lshell32.lib',
-              '-lws2_32.lib'
+              '-ladvapi32',
+              '-liphlpapi',
+              '-lpsapi',
+              '-lshell32',
+              '-lws2_32'
             ],
           },
         }, { # Not Windows i.e. POSIX
@@ -136,6 +137,7 @@
             'include/uv-sunos.h',
             'include/uv-darwin.h',
             'include/uv-bsd.h',
+            'include/uv-aix.h',
             'src/unix/async.c',
             'src/unix/atomic-ops.h',
             'src/unix/core.c',
@@ -154,7 +156,6 @@
             'src/unix/stream.c',
             'src/unix/tcp.c',
             'src/unix/thread.c',
-            'src/unix/threadpool.c',
             'src/unix/timer.c',
             'src/unix/tty.c',
             'src/unix/udp.c',
@@ -245,6 +246,7 @@
           'defines': [
             '_ALL_SOURCE',
             '_XOPEN_SOURCE=500',
+            '_LINUX_SOURCE_COMPAT',
           ],
           'link_settings': {
             'libraries': [
@@ -378,6 +380,7 @@
         'test/test-tcp-try-write.c',
         'test/test-tcp-unexpected-read.c',
         'test/test-tcp-read-stop.c',
+        'test/test-tcp-write-queue-order.c',
         'test/test-threadpool.c',
         'test/test-threadpool-cancel.c',
         'test/test-mutexes.c',
@@ -394,6 +397,7 @@
         'test/test-udp-open.c',
         'test/test-udp-options.c',
         'test/test-udp-send-and-recv.c',
+        'test/test-udp-send-immediate.c',
         'test/test-udp-multicast-join.c',
         'test/test-udp-multicast-join6.c',
         'test/test-dlerror.c',
@@ -402,6 +406,7 @@
         'test/test-ip6-addr.c',
         'test/test-udp-multicast-interface.c',
         'test/test-udp-multicast-interface6.c',
+        'test/test-udp-try-send.c',
       ],
       'conditions': [
         [ 'OS=="win"', {
@@ -409,7 +414,7 @@
             'test/runner-win.c',
             'test/runner-win.h'
           ],
-          'libraries': [ 'ws2_32.lib' ]
+          'libraries': [ '-lws2_32' ]
         }, { # POSIX
           'defines': [ '_GNU_SOURCE' ],
           'sources': [
@@ -473,7 +478,7 @@
             'test/runner-win.c',
             'test/runner-win.h',
           ],
-          'libraries': [ 'ws2_32.lib' ]
+          'libraries': [ '-lws2_32' ]
         }, { # POSIX
           'defines': [ '_GNU_SOURCE' ],
           'sources': [