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49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <winsock2.h>
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#include "net/base/winsock_init.h"
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#include "base/lazy_instance.h"
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#include "base/logging.h"
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namespace {
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class WinsockInitSingleton {
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public:
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WinsockInitSingleton() {
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WORD winsock_ver = MAKEWORD(2, 2);
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WSAData wsa_data;
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bool did_init = (WSAStartup(winsock_ver, &wsa_data) == 0);
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if (did_init) {
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DCHECK(wsa_data.wVersion == winsock_ver);
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// The first time WSAGetLastError is called, the delay load helper will
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// resolve the address with GetProcAddress and fixup the import. If a
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// third party application hooks system functions without correctly
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// restoring the error code, it is possible that the error code will be
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// overwritten during delay load resolution. The result of the first
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// call may be incorrect, so make sure the function is bound and future
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// results will be correct.
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WSAGetLastError();
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}
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}
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};
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// Worker pool threads that use the Windows Sockets API may still be running at
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// shutdown. Leak instance and skip cleanup.
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static base::LazyInstance<WinsockInitSingleton>::Leaky
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g_winsock_init_singleton = LAZY_INSTANCE_INITIALIZER;
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} // namespace
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namespace net {
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void EnsureWinsockInit() {
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g_winsock_init_singleton.Get();
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}
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} // namespace net
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