1 /*
2  *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
3  *
4  *  Use of this source code is governed by a BSD-style license
5  *  that can be found in the LICENSE file in the root of the source
6  *  tree. An additional intellectual property rights grant can be found
7  *  in the file PATENTS.  All contributing project authors may
8  *  be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 #ifndef WEBRTC_SYSTEM_WRAPPERS_INTERFACE_CONDITION_VARIABLE_WRAPPER_H_
12 #define WEBRTC_SYSTEM_WRAPPERS_INTERFACE_CONDITION_VARIABLE_WRAPPER_H_
13 
14 namespace webrtc {
15 class CriticalSectionWrapper;
16 
17 class ConditionVariableWrapper
18 {
19 public:
20     // Factory method, constructor disabled.
21     static ConditionVariableWrapper* CreateConditionVariable();
22 
~ConditionVariableWrapper()23     virtual ~ConditionVariableWrapper() {}
24 
25     // Calling thread will atomically release critSect and wait until next
26     // some other thread calls Wake() or WakeAll().
27     virtual void SleepCS(CriticalSectionWrapper& critSect) = 0;
28 
29     // Same as above but with a timeout.
30     virtual bool SleepCS(CriticalSectionWrapper& critSect,
31                          unsigned long maxTimeInMS) = 0;
32 
33     // Wakes one thread calling SleepCS().
34     virtual void Wake() = 0;
35 
36     // Wakes all threads calling SleepCS().
37     virtual void WakeAll() = 0;
38 };
39 } // namespace webrtc
40 
41 #endif // WEBRTC_SYSTEM_WRAPPERS_INTERFACE_CONDITION_VARIABLE_WRAPPER_H_
42