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  }
    42
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