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 #pragma once 8 9 #include <winsock2.h> 10 11 namespace net { 12 13 // Assert that the (manual-reset) event object is not signaled. 14 void AssertEventNotSignaled(WSAEVENT hEvent); 15 16 // If the (manual-reset) event object is signaled, resets it and returns true. 17 // Otherwise, does nothing and returns false. Called after a Winsock function 18 // succeeds synchronously 19 // 20 // Our testing shows that except in rare cases (when running inside QEMU), 21 // the event object is already signaled at this point, so we call this method 22 // to avoid a context switch in common cases. This is just a performance 23 // optimization. The code still works if this function simply returns false. 24 bool ResetEventIfSignaled(WSAEVENT hEvent); 25 26 } // namespace net 27 28 #endif // NET_BASE_WINSOCK_UTIL_H_ 29