1 files changed, 158 insertions, 0 deletions
diff --git a/ACE/ace/MEM_Stream.h b/ACE/ace/MEM_Stream.h
new file mode 100644
index 00000000000..6b4ff4cdd41
--- /dev/null
+++ b/ACE/ace/MEM_Stream.h
@@ -0,0 +1,158 @@
+// -*- C++ -*-
+
+//=============================================================================
+/**
+ *  @file    MEM_Stream.h
+ *
+ *  $Id$
+ *
+ *  @author Nanbor Wang <nanbor@cs.wustl.edu>
+ */
+//=============================================================================
+
+
+#ifndef ACE_MEM_STREAM_H
+#define ACE_MEM_STREAM_H
+#include /**/ "ace/pre.h"
+
+#include "ace/MEM_IO.h"
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+# pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+#if (ACE_HAS_POSITION_INDEPENDENT_POINTERS == 1)
+
+#include "ace/INET_Addr.h"
+
+#if !defined (ACE_MEM_STREAM_MIN_BUFFER)
+# define ACE_MEM_STREAM_MIN_BUFFER 4096
+#endif /* ACE_MEM_STREAM_MIN_BUFFER */
+
+ACE_BEGIN_VERSIONED_NAMESPACE_DECL
+
+class ACE_MEM_Acceptor;
+class ACE_MEM_Connector;
+
+/**
+ * @class ACE_MEM_Stream
+ *
+ * @brief Defines the methods in the ACE_MEM_Stream abstraction.
+ *
+ * This adds additional wrapper methods atop the ACE_MEM_IO
+ * class.  Notice that ACE_MEM_Stream can only send messages no bigger
+ * than the underlying MMAP file size minus sizeof (ACE_MEM_SAP_Node).
+ * The size of the MMAP file is default to ACE_MEM_STREAM_MIN_BUFFER.
+ * (Define above in this file, to 4096 bytes.)
+ * If you need to increase the size of allowable message
+ * ACE_MEM_Stream can handle, you can set it to either
+ * @c ACE_MEM_Acceptor::malloc_options(). minimal_bytes_
+ * @c ACE_MEM_Acceptor::init_buffer_size (size_t size);
+ * before establishing a connection.
+ */
+class ACE_Export ACE_MEM_Stream : public ACE_MEM_IO
+{
+public:
+
+  friend class ACE_MEM_Acceptor;
+  friend class ACE_MEM_Connector;
+
+  // Initialization and termination methods.
+  /// Constructor.
+  ACE_MEM_Stream (void);
+
+  /// Constructor (sets the underlying ACE_HANDLE with <h>).
+  ACE_MEM_Stream (ACE_HANDLE h);
+
+  /// Destructor.
+  ~ACE_MEM_Stream (void);
+
+  //= The following two methods use write and read system calls.
+  /// Send n bytes, keep trying until n are sent.
+  /// Recv n bytes, keep trying until n are received.
+  ssize_t send_n (const void *buf, size_t n);
+  ssize_t recv_n (void *buf, size_t n);
+
+  // = The following two methods use the send and recv system calls.
+  /// Send n bytes, keep trying until n are sent.
+  /// Recv n bytes, keep trying until n are received.
+  ssize_t send_n (const void *buf, size_t n, int flags);
+  ssize_t recv_n (void *buf, size_t n, int flags);
+
+#if 0
+  /**
+   * Try to send exactly <len> bytes into <buf> from <handle> (uses
+   * the <send> call).  If <send> blocks for longer than <timeout> the
+   * number of bytes actually sent is returned with <errno == ETIME>.
+   * If a timeout does not occur, <send_n> return <len> (i.e., the
+   * number of bytes requested to be sent).
+   */
+  ssize_t send_n (const void *buf,
+                  size_t len,
+                  int flags,
+                  const ACE_Time_Value *timeout);
+
+  /**
+   * Try to recv exactly <len> bytes into <buf> from <handle> (uses
+   * the <ACE::recv_n> call).  The <ACE_Time_Value> indicates how long
+   * to blocking trying to receive.  If <timeout> == 0, the caller
+   * will block until action is possible, else will wait until the
+   * relative time specified in *<timeout> elapses).  If <recv> blocks
+   * for longer than <timeout> the number of bytes actually read is
+   * returned with <errno == ETIME>.  If a timeout does not occur,
+   * <recv_n> return <len> (i.e., the number of bytes requested to be
+   * read).
+   */
+  ssize_t recv_n (void *buf,
+                  size_t len,
+                  int flags,
+                  const ACE_Time_Value *timeout);
+
+  /**
+   * Send an <iovec> of size <n> to the connected socket (uses
+   * <ACE::sendv_n>).  Will block until all bytes are sent or an error
+   * occurs.
+   */
+  ssize_t sendv_n (const iovec iov[],
+                   size_t n) const;
+
+  /// Receive an <iovec> of size <n> to the connected socket.
+  ssize_t recvv_n (iovec iov[],
+                   size_t n) const;
+#endif /* 0 */
+
+  // = Selectively close endpoints.
+
+  /// Close down the reader.
+  int close_reader (void);
+
+  /// Close down the writer.
+  int close_writer (void);
+
+  /**
+   * Close down the socket (we need this to make things work correctly
+   * on Win32, which requires use to do a <close_writer> before doing
+   * the close to avoid losing data).
+   */
+  int close (void);
+
+  // = Meta-type info
+  typedef ACE_Addr PEER_ADDR;
+
+  /// Dump the state of an object.
+  void dump (void) const;
+
+  /// Declare the dynamic allocation hooks.
+  ACE_ALLOC_HOOK_DECLARE;
+};
+
+ACE_END_VERSIONED_NAMESPACE_DECL
+
+#if defined (__ACE_INLINE__)
+#include "ace/MEM_Stream.inl"
+#endif /* __ACE_INLINE__ */
+
+#endif /* ACE_HAS_POSITION_INDEPENDENT_POINTERS == 1 */
+
+#include /**/ "ace/post.h"
+#endif /* ACE_MEM_STREAM_H */