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/*
* 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_SOURCE_CONDITION_VARIABLE_WINDOWS_H_
#define WEBRTC_SYSTEM_WRAPPERS_SOURCE_CONDITION_VARIABLE_WINDOWS_H_
#include "condition_variable_wrapper.h"
#include <windows.h>
namespace webrtc {
#if !defined CONDITION_VARIABLE_INIT
typedef struct _RTL_CONDITION_VARIABLE
{
void* Ptr;
} RTL_CONDITION_VARIABLE, *PRTL_CONDITION_VARIABLE;
typedef RTL_CONDITION_VARIABLE CONDITION_VARIABLE, *PCONDITION_VARIABLE;
#endif
typedef void (WINAPI *PInitializeConditionVariable)(PCONDITION_VARIABLE);
typedef BOOL (WINAPI *PSleepConditionVariableCS)(PCONDITION_VARIABLE,
PCRITICAL_SECTION, DWORD);
typedef void (WINAPI *PWakeConditionVariable)(PCONDITION_VARIABLE);
typedef void (WINAPI *PWakeAllConditionVariable)(PCONDITION_VARIABLE);
class ConditionVariableWindows : public ConditionVariableWrapper
{
public:
ConditionVariableWindows();
~ConditionVariableWindows();
void SleepCS(CriticalSectionWrapper& critSect);
bool SleepCS(CriticalSectionWrapper& critSect, unsigned long maxTimeInMS);
void Wake();
void WakeAll();
private:
enum EventWakeUpType
{
WAKEALL_0 = 0,
WAKEALL_1 = 1,
WAKE = 2,
EVENT_COUNT = 3
};
private:
// Native support for Windows Vista+
static bool _winSupportConditionVariablesPrimitive;
CONDITION_VARIABLE _conditionVariable;
unsigned int _numWaiters[2];
EventWakeUpType _eventID;
CRITICAL_SECTION _numWaitersCritSect;
HANDLE _events[EVENT_COUNT];
};
} // namespace webrtc
#endif // WEBRTC_SYSTEM_WRAPPERS_SOURCE_CONDITION_VARIABLE_WINDOWS_H_
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