d56d68cd27
This should have been a part of https://codereview.webrtc.org/1413333002/ The header guard PRESUBMIT rule is being enabled in https://codereview.webrtc.org/1419203005 so things like this won't happen in the future. BUG=5095 NOTRY=True Review URL: https://codereview.webrtc.org/1425693005 Cr-Commit-Position: refs/heads/master@{#10475}
55 lines
1.8 KiB
C++
55 lines
1.8 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_
|
|
|
|
// If the critical section is heavily contended it may be beneficial to use
|
|
// read/write locks instead.
|
|
|
|
#include "webrtc/base/thread_annotations.h"
|
|
#include "webrtc/common_types.h"
|
|
|
|
namespace webrtc {
|
|
class LOCKABLE CriticalSectionWrapper {
|
|
public:
|
|
// Factory method, constructor disabled
|
|
static CriticalSectionWrapper* CreateCriticalSection();
|
|
|
|
virtual ~CriticalSectionWrapper() {}
|
|
|
|
// Tries to grab lock, beginning of a critical section. Will wait for the
|
|
// lock to become available if the grab failed.
|
|
virtual void Enter() EXCLUSIVE_LOCK_FUNCTION() = 0;
|
|
|
|
// Returns a grabbed lock, end of critical section.
|
|
virtual void Leave() UNLOCK_FUNCTION() = 0;
|
|
};
|
|
|
|
// 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_
|