e8493326f2
ConditionVariableEventWin remains for now since it's still needed for the rw lock on Windows XP. BUG= R=pbos@webrtc.org Review URL: https://codereview.webrtc.org/1601523009 . Cr-Commit-Position: refs/heads/master@{#11317}
73 lines
2.2 KiB
C++
73 lines
2.2 KiB
C++
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_SYSTEM_WRAPPERS_INCLUDE_CRITICAL_SECTION_WRAPPER_H_
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#define WEBRTC_SYSTEM_WRAPPERS_INCLUDE_CRITICAL_SECTION_WRAPPER_H_
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// If the critical section is heavily contended it may be beneficial to use
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// read/write locks instead.
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#if defined (WEBRTC_WIN)
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#include <windows.h>
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#else
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#include <pthread.h>
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#endif
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#include "webrtc/base/thread_annotations.h"
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#include "webrtc/common_types.h"
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namespace webrtc {
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class LOCKABLE CriticalSectionWrapper {
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public:
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// Legacy factory method, being deprecated. Please use the constructor.
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// TODO(tommi): Remove the CriticalSectionWrapper class and move users over
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// to using rtc::CriticalSection. Before we can do that though, we need to
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// fix the problem with the ConditionVariable* classes (see below).
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static CriticalSectionWrapper* CreateCriticalSection();
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CriticalSectionWrapper();
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~CriticalSectionWrapper();
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// Tries to grab lock, beginning of a critical section. Will wait for the
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// lock to become available if the grab failed.
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void Enter() EXCLUSIVE_LOCK_FUNCTION();
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// Returns a grabbed lock, end of critical section.
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void Leave() UNLOCK_FUNCTION();
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private:
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#if defined (WEBRTC_WIN)
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CRITICAL_SECTION crit_;
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#else
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pthread_mutex_t mutex_;
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#endif
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};
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// RAII extension of the critical section. Prevents Enter/Leave mismatches and
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// provides more compact critical section syntax.
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class SCOPED_LOCKABLE CriticalSectionScoped {
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public:
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explicit CriticalSectionScoped(CriticalSectionWrapper* critsec)
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EXCLUSIVE_LOCK_FUNCTION(critsec)
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: ptr_crit_sec_(critsec) {
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ptr_crit_sec_->Enter();
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}
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~CriticalSectionScoped() UNLOCK_FUNCTION() { ptr_crit_sec_->Leave(); }
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private:
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CriticalSectionWrapper* ptr_crit_sec_;
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};
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} // namespace webrtc
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#endif // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_CRITICAL_SECTION_WRAPPER_H_
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