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Issue 992733002: Remove //net (except for Android test stuff) and sdch (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 5 years, 9 months ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include <winsock2.h>
6
7 #include "net/base/winsock_init.h"
8
9 #include "base/lazy_instance.h"
10 #include "base/logging.h"
11
12 namespace {
13
14 class WinsockInitSingleton {
15 public:
16 WinsockInitSingleton() {
17 WORD winsock_ver = MAKEWORD(2, 2);
18 WSAData wsa_data;
19 bool did_init = (WSAStartup(winsock_ver, &wsa_data) == 0);
20 if (did_init) {
21 DCHECK(wsa_data.wVersion == winsock_ver);
22
23 // The first time WSAGetLastError is called, the delay load helper will
24 // resolve the address with GetProcAddress and fixup the import. If a
25 // third party application hooks system functions without correctly
26 // restoring the error code, it is possible that the error code will be
27 // overwritten during delay load resolution. The result of the first
28 // call may be incorrect, so make sure the function is bound and future
29 // results will be correct.
30 WSAGetLastError();
31 }
32 }
33
34 ~WinsockInitSingleton() {
35 // Don't call WSACleanup() since the worker pool threads can continue to
36 // call getaddrinfo() after Winsock has shutdown, which can lead to crashes.
37 }
38 };
39
40 static base::LazyInstance<WinsockInitSingleton> g_winsock_init_singleton =
41 LAZY_INSTANCE_INITIALIZER;
42
43 } // namespace
44
45 namespace net {
46
47 void EnsureWinsockInit() {
48 g_winsock_init_singleton.Get();
49 }
50
51 } // namespace net
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