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
11namespace net {
12
13// Assert that the (manual-reset) event object is not signaled.
14void 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.
24bool ResetEventIfSignaled(WSAEVENT hEvent);
25
26}  // namespace net
27
28#endif  // NET_BASE_WINSOCK_UTIL_H_
29