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 #ifndef NET_BASE_WINSOCK_UTIL_H_ 6 #define NET_BASE_WINSOCK_UTIL_H_ 7 8 #include <winsock2.h> 9 10 #include "net/base/net_export.h" 11 12 namespace net { 13 14 // Assert that the (manual-reset) event object is not signaled. 15 void AssertEventNotSignaled(WSAEVENT hEvent); 16 17 // If the (manual-reset) event object is signaled, resets it and returns true. 18 // Otherwise, does nothing and returns false. Called after a Winsock function 19 // succeeds synchronously 20 // 21 // Our testing shows that except in rare cases (when running inside QEMU), 22 // the event object is already signaled at this point, so we call this method 23 // to avoid a context switch in common cases. This is just a performance 24 // optimization. The code still works if this function simply returns false. 25 bool ResetEventIfSignaled(WSAEVENT hEvent); 26 27 // Interface to create Windows Socket. 28 // Usually such factories are used for testing purposes, which is not true in 29 // this case. This interface is used to substitute WSASocket to make possible 30 // execution of some network code in sandbox. 31 class NET_EXPORT PlatformSocketFactory { 32 public: 33 PlatformSocketFactory() {} 34 virtual ~PlatformSocketFactory() {} 35 36 // Creates Windows socket. See WSASocket documentation of parameters. 37 virtual SOCKET CreateSocket(int family, int type, int protocol) = 0; 38 39 // Replace WSASocket with given factory. The factory will be used by 40 // CreatePlatformSocket. 41 static void SetInstance(PlatformSocketFactory* factory); 42 }; 43 44 // Creates Windows Socket. See WSASocket documentation of parameters. 45 SOCKET CreatePlatformSocket(int family, int type, int protocol); 46 47 } // namespace net 48 49 #endif // NET_BASE_WINSOCK_UTIL_H_ 50
