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// Copyright (c) 2006-2008 The Chromium 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 <winsock2.h>
#include "net/base/winsock_init.h"
#include "base/logging.h"
#include "base/singleton.h"
namespace {
class WinsockInitSingleton {
public:
WinsockInitSingleton() : did_init_(false) {
WORD winsock_ver = MAKEWORD(2, 2);
WSAData wsa_data;
did_init_ = (WSAStartup(winsock_ver, &wsa_data) == 0);
if (did_init_) {
DCHECK(wsa_data.wVersion == winsock_ver);
// The first time WSAGetLastError is called, the delay load helper will
// resolve the address with GetProcAddress and fixup the import. If a
// third party application hooks system functions without correctly
// restoring the error code, it is possible that the error code will be
// overwritten during delay load resolution. The result of the first
// call may be incorrect, so make sure the function is bound and future
// results will be correct.
WSAGetLastError();
}
}
~WinsockInitSingleton() {
if (did_init_)
WSACleanup();
}
private:
bool did_init_;
};
} // namespace
namespace net {
void EnsureWinsockInit() {
Singleton<WinsockInitSingleton>::get();
}
} // namespace net
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