57 lines
1.8 KiB
C++
57 lines
1.8 KiB
C++
/*
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* Copyright 2020 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 RTC_BASE_SYNCHRONIZATION_MUTEX_CRITICAL_SECTION_H_
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#define RTC_BASE_SYNCHRONIZATION_MUTEX_CRITICAL_SECTION_H_
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#if defined(WEBRTC_WIN)
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// clang-format off
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// clang formating would change include order.
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// Include winsock2.h before including <windows.h> to maintain consistency with
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// win32.h. To include win32.h directly, it must be broken out into its own
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// build target.
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#include <winsock2.h>
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#include <windows.h>
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#include <sal.h> // must come after windows headers.
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// clang-format on
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#include "absl/base/attributes.h"
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#include "rtc_base/thread_annotations.h"
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namespace webrtc {
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class RTC_LOCKABLE MutexImpl final {
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public:
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MutexImpl() { InitializeCriticalSection(&critical_section_); }
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MutexImpl(const MutexImpl&) = delete;
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MutexImpl& operator=(const MutexImpl&) = delete;
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~MutexImpl() { DeleteCriticalSection(&critical_section_); }
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void Lock() RTC_EXCLUSIVE_LOCK_FUNCTION() {
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EnterCriticalSection(&critical_section_);
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}
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ABSL_MUST_USE_RESULT bool TryLock() RTC_EXCLUSIVE_TRYLOCK_FUNCTION(true) {
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return TryEnterCriticalSection(&critical_section_) != FALSE;
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}
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void AssertHeld() const RTC_ASSERT_EXCLUSIVE_LOCK() {}
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void Unlock() RTC_UNLOCK_FUNCTION() {
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LeaveCriticalSection(&critical_section_);
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}
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private:
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CRITICAL_SECTION critical_section_;
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};
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} // namespace webrtc
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#endif // #if defined(WEBRTC_WIN)
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#endif // RTC_BASE_SYNCHRONIZATION_MUTEX_CRITICAL_SECTION_H_
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