winsock_util.h revision 424c4d7b64af9d0d8fd9624f381f469654d5e3d2
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 12namespace net { 13 14// Assert that the (manual-reset) event object is not signaled. 15void 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. 25bool ResetEventIfSignaled(WSAEVENT hEvent); 26 27} // namespace net 28 29#endif // NET_BASE_WINSOCK_UTIL_H_ 30