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4a4f162f71
Fairshare mutexes performed really badly during a Catalina performance test. This change switches them to use the _PTHREAD_MUTEX_POLICY_FIRSTFIT policy instead. Bug: webrtc:11567, webrtc:11648 Change-Id: I2b8fbe3183beefc26f8d4ff3d63dc6958174605f Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/176504 Reviewed-by: Tommi <tommi@webrtc.org> Reviewed-by: Oskar Sundbom <ossu@webrtc.org> Commit-Queue: Tommi <tommi@webrtc.org> Cr-Commit-Position: refs/heads/master@{#31456}
53 lines
1.6 KiB
C++
53 lines
1.6 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_PTHREAD_H_
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#define RTC_BASE_SYNCHRONIZATION_MUTEX_PTHREAD_H_
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#if defined(WEBRTC_POSIX)
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#include <pthread.h>
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#if defined(WEBRTC_MAC)
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#include <pthread_spis.h>
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#endif
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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() {
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pthread_mutexattr_t mutex_attribute;
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pthread_mutexattr_init(&mutex_attribute);
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#if defined(WEBRTC_MAC)
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pthread_mutexattr_setpolicy_np(&mutex_attribute,
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_PTHREAD_MUTEX_POLICY_FIRSTFIT);
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#endif
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pthread_mutex_init(&mutex_, &mutex_attribute);
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pthread_mutexattr_destroy(&mutex_attribute);
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}
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MutexImpl(const MutexImpl&) = delete;
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MutexImpl& operator=(const MutexImpl&) = delete;
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~MutexImpl() { pthread_mutex_destroy(&mutex_); }
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void Lock() RTC_EXCLUSIVE_LOCK_FUNCTION() { pthread_mutex_lock(&mutex_); }
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RTC_WARN_UNUSED_RESULT bool TryLock() RTC_EXCLUSIVE_TRYLOCK_FUNCTION(true) {
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return pthread_mutex_trylock(&mutex_) == 0;
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}
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void Unlock() RTC_UNLOCK_FUNCTION() { pthread_mutex_unlock(&mutex_); }
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private:
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pthread_mutex_t mutex_;
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};
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} // namespace webrtc
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#endif // #if defined(WEBRTC_POSIX)
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#endif // RTC_BASE_SYNCHRONIZATION_MUTEX_PTHREAD_H_
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