diff options
Diffstat (limited to 'src/runtime/netpoll_windows.c')
| -rw-r--r-- | src/runtime/netpoll_windows.c | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/src/runtime/netpoll_windows.c b/src/runtime/netpoll_windows.c deleted file mode 100644 index 64da41ad9..000000000 --- a/src/runtime/netpoll_windows.c +++ /dev/null @@ -1,163 +0,0 @@ -// Copyright 2013 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -#include "runtime.h" -#include "defs_GOOS_GOARCH.h" -#include "os_GOOS.h" - -#define DWORD_MAX 0xffffffff - -#pragma dynimport runtime·CreateIoCompletionPort CreateIoCompletionPort "kernel32.dll" -#pragma dynimport runtime·GetQueuedCompletionStatus GetQueuedCompletionStatus "kernel32.dll" -#pragma dynimport runtime·WSAGetOverlappedResult WSAGetOverlappedResult "ws2_32.dll" - -extern void *runtime·CreateIoCompletionPort; -extern void *runtime·GetQueuedCompletionStatus; -extern void *runtime·WSAGetOverlappedResult; - -#define INVALID_HANDLE_VALUE ((uintptr)-1) - -// net_op must be the same as beginning of net.operation. Keep these in sync. -typedef struct net_op net_op; -struct net_op -{ - // used by windows - Overlapped o; - // used by netpoll - PollDesc* pd; - int32 mode; - int32 errno; - uint32 qty; -}; - -typedef struct OverlappedEntry OverlappedEntry; -struct OverlappedEntry -{ - uintptr key; - net_op* op; // In reality it's Overlapped*, but we cast it to net_op* anyway. - uintptr internal; - uint32 qty; -}; - -static void handlecompletion(G **gpp, net_op *o, int32 errno, uint32 qty); - -static uintptr iocphandle = INVALID_HANDLE_VALUE; // completion port io handle - -void -runtime·netpollinit(void) -{ - iocphandle = (uintptr)runtime·stdcall4(runtime·CreateIoCompletionPort, INVALID_HANDLE_VALUE, 0, 0, DWORD_MAX); - if(iocphandle == 0) { - runtime·printf("netpoll: failed to create iocp handle (errno=%d)\n", runtime·getlasterror()); - runtime·throw("netpoll: failed to create iocp handle"); - } - return; -} - -int32 -runtime·netpollopen(uintptr fd, PollDesc *pd) -{ - USED(pd); - if(runtime·stdcall4(runtime·CreateIoCompletionPort, fd, iocphandle, 0, 0) == 0) - return -runtime·getlasterror(); - return 0; -} - -int32 -runtime·netpollclose(uintptr fd) -{ - // nothing to do - USED(fd); - return 0; -} - -void -runtime·netpollarm(PollDesc* pd, int32 mode) -{ - USED(pd, mode); - runtime·throw("unused"); -} - -// Polls for completed network IO. -// Returns list of goroutines that become runnable. -G* -runtime·netpoll(bool block) -{ - OverlappedEntry entries[64]; - uint32 wait, qty, key, flags, n, i; - int32 errno; - net_op *op; - G *gp; - - if(iocphandle == INVALID_HANDLE_VALUE) - return nil; - gp = nil; - wait = 0; - if(block) - wait = INFINITE; -retry: - if(runtime·GetQueuedCompletionStatusEx != nil) { - n = nelem(entries) / runtime·gomaxprocs; - if(n < 8) - n = 8; - if(block) - g->m->blocked = true; - if(runtime·stdcall6(runtime·GetQueuedCompletionStatusEx, iocphandle, (uintptr)entries, n, (uintptr)&n, wait, 0) == 0) { - g->m->blocked = false; - errno = runtime·getlasterror(); - if(!block && errno == WAIT_TIMEOUT) - return nil; - runtime·printf("netpoll: GetQueuedCompletionStatusEx failed (errno=%d)\n", errno); - runtime·throw("netpoll: GetQueuedCompletionStatusEx failed"); - } - g->m->blocked = false; - for(i = 0; i < n; i++) { - op = entries[i].op; - errno = 0; - qty = 0; - if(runtime·stdcall5(runtime·WSAGetOverlappedResult, runtime·netpollfd(op->pd), (uintptr)op, (uintptr)&qty, 0, (uintptr)&flags) == 0) - errno = runtime·getlasterror(); - handlecompletion(&gp, op, errno, qty); - } - } else { - op = nil; - errno = 0; - qty = 0; - if(block) - g->m->blocked = true; - if(runtime·stdcall5(runtime·GetQueuedCompletionStatus, iocphandle, (uintptr)&qty, (uintptr)&key, (uintptr)&op, wait) == 0) { - g->m->blocked = false; - errno = runtime·getlasterror(); - if(!block && errno == WAIT_TIMEOUT) - return nil; - if(op == nil) { - runtime·printf("netpoll: GetQueuedCompletionStatus failed (errno=%d)\n", errno); - runtime·throw("netpoll: GetQueuedCompletionStatus failed"); - } - // dequeued failed IO packet, so report that - } - g->m->blocked = false; - handlecompletion(&gp, op, errno, qty); - } - if(block && gp == nil) - goto retry; - return gp; -} - -static void -handlecompletion(G **gpp, net_op *op, int32 errno, uint32 qty) -{ - int32 mode; - - if(op == nil) - runtime·throw("netpoll: GetQueuedCompletionStatus returned op == nil"); - mode = op->mode; - if(mode != 'r' && mode != 'w') { - runtime·printf("netpoll: GetQueuedCompletionStatus returned invalid mode=%d\n", mode); - runtime·throw("netpoll: GetQueuedCompletionStatus returned invalid mode"); - } - op->errno = errno; - op->qty = qty; - runtime·netpollready(gpp, op->pd, mode); -} |