text: /*
   *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
   *
   *  Use of this source code is governed by a BSD-style license
   *  that can be found in the LICENSE file in the root of the source
   *  tree. An additional intellectual property rights grant can be found
   *  in the file PATENTS.  All contributing project authors may
   *  be found in the AUTHORS file in the root of the source tree.
   */
  
  #ifndef WEBRTC_SYSTEM_WRAPPERS_INTERFACE_CONDITION_VARIABLE_WRAPPER_H_
  #define WEBRTC_SYSTEM_WRAPPERS_INTERFACE_CONDITION_VARIABLE_WRAPPER_H_
  
  namespace webrtc {
  class CriticalSectionWrapper;
  
  class ConditionVariableWrapper
  {
  public:
      // Factory method, constructor disabled.
      static ConditionVariableWrapper* CreateConditionVariable();
  
      virtual ~ConditionVariableWrapper() {}
  
      // Calling thread will atomically release critSect and wait until next
      // some other thread calls Wake() or WakeAll().
      virtual void SleepCS(CriticalSectionWrapper& critSect) = 0;
  
      // Same as above but with a timeout.
      virtual bool SleepCS(CriticalSectionWrapper& critSect,
                           unsigned long maxTimeInMS) = 0;
  
      // Wakes one thread calling SleepCS().
      virtual void Wake() = 0;
  
      // Wakes all threads calling SleepCS().
      virtual void WakeAll() = 0;
  };
  } // namespace webrtc
  
  #endif // WEBRTC_SYSTEM_WRAPPERS_INTERFACE_CONDITION_VARIABLE_WRAPPER_H_
  