rhubarb-lip-sync/lib/webrtc-8d2248ff/webrtc/system_wrappers/include/critical_section_wrapper.h

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2.0 KiB
C++

/*
* 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_INCLUDE_CRITICAL_SECTION_WRAPPER_H_
#define WEBRTC_SYSTEM_WRAPPERS_INCLUDE_CRITICAL_SECTION_WRAPPER_H_
#include "webrtc/base/criticalsection.h"
#include "webrtc/base/thread_annotations.h"
#include "webrtc/common_types.h"
namespace webrtc {
class LOCKABLE CriticalSectionWrapper {
public:
// Legacy factory method, being deprecated. Please use the constructor.
// TODO(tommi): Remove the CriticalSectionWrapper class and move users over
// to using rtc::CriticalSection.
static CriticalSectionWrapper* CreateCriticalSection() {
return new CriticalSectionWrapper();
}
CriticalSectionWrapper() {}
~CriticalSectionWrapper() {}
// Tries to grab lock, beginning of a critical section. Will wait for the
// lock to become available if the grab failed.
void Enter() EXCLUSIVE_LOCK_FUNCTION() { lock_.Enter(); }
// Returns a grabbed lock, end of critical section.
void Leave() UNLOCK_FUNCTION() { lock_.Leave(); }
private:
rtc::CriticalSection lock_;
};
// RAII extension of the critical section. Prevents Enter/Leave mismatches and
// provides more compact critical section syntax.
class SCOPED_LOCKABLE CriticalSectionScoped {
public:
explicit CriticalSectionScoped(CriticalSectionWrapper* critsec)
EXCLUSIVE_LOCK_FUNCTION(critsec)
: ptr_crit_sec_(critsec) {
ptr_crit_sec_->Enter();
}
~CriticalSectionScoped() UNLOCK_FUNCTION() { ptr_crit_sec_->Leave(); }
private:
CriticalSectionWrapper* ptr_crit_sec_;
};
} // namespace webrtc
#endif // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_CRITICAL_SECTION_WRAPPER_H_