libgo/go/net/sock_windows.go

   1 // Copyright 2009 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 package net
   6
   7 import (
   8         "internal/syscall/windows"
   9         "os"
  10         "syscall"
  11 )
  12
  13 func maxListenerBacklog() int {
  14         // TODO: Implement this
  15         // NOTE: Never return a number bigger than 1<<16 - 1. See issue 5030.
  16         return syscall.SOMAXCONN
  17 }
  18
  19 func sysSocket(family, sotype, proto int) (syscall.Handle, error) {
  20         s, err := wsaSocketFunc(int32(family), int32(sotype), int32(proto),
  21                 nil, 0, windows.WSA_FLAG_OVERLAPPED|windows.WSA_FLAG_NO_HANDLE_INHERIT)
  22         if err == nil {
  23                 return s, nil
  24         }
  25         // WSA_FLAG_NO_HANDLE_INHERIT flag is not supported on some
  26         // old versions of Windows, see
  27         // https://msdn.microsoft.com/en-us/library/windows/desktop/ms742212(v=vs.85).aspx
  28         // for details. Just use syscall.Socket, if windows.WSASocket failed.
  29
  30         // See ../syscall/exec_unix.go for description of ForkLock.
  31         syscall.ForkLock.RLock()
  32         s, err = socketFunc(family, sotype, proto)
  33         if err == nil {
  34                 syscall.CloseOnExec(s)
  35         }
  36         syscall.ForkLock.RUnlock()
  37         if err != nil {
  38                 return syscall.InvalidHandle, os.NewSyscallError("socket", err)
  39         }
  40         return s, nil
  41 }