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_INCLUDE_CONDITION_VARIABLE_WRAPPER_H_
12 #define WEBRTC_SYSTEM_WRAPPERS_INCLUDE_CONDITION_VARIABLE_WRAPPER_H_
13 
14 namespace webrtc {
15 
16 class CriticalSectionWrapper;
17 
18 class ConditionVariableWrapper {
19  public:
20   // Factory method, constructor disabled.
21   static ConditionVariableWrapper* CreateConditionVariable();
22 
~ConditionVariableWrapper()23   virtual ~ConditionVariableWrapper() {}
24 
25   // Calling thread will atomically release crit_sect and wait until next
26   // some other thread calls Wake() or WakeAll().
27   virtual void SleepCS(CriticalSectionWrapper& crit_sect) = 0;
28 
29   // Same as above but with a timeout.
30   virtual bool SleepCS(CriticalSectionWrapper& crit_sect,
31                        unsigned long max_time_in_ms) = 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 
40 }  // namespace webrtc
41 
42 #endif  // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_CONDITION_VARIABLE_WRAPPER_H_
43