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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 #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 } // namespace net | |
| 28 | |
| 29 #endif // NET_BASE_WINSOCK_UTIL_H_ | |
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