trunk/src/system_wrappers/interface/condition_variable_wrapper.h

/*
 *  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_