/* * Copyright (C) 2015-2017 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #include <wtf/Lock.h> #include <wtf/LockAlgorithmInlines.h> #include <wtf/StackShotProfiler.h> namespace WTF { static constexpr bool profileLockContention = false; void Lock::lockSlow() { if (profileLockContention) STACK_SHOT_PROFILE(4, 2, 5); DefaultLockAlgorithm::lockSlow(m_byte); } void Lock::unlockSlow() { DefaultLockAlgorithm::unlockSlow(m_byte, DefaultLockAlgorithm::Unfair); } void Lock::unlockFairlySlow() { DefaultLockAlgorithm::unlockSlow(m_byte, DefaultLockAlgorithm::Fair); } void Lock::safepointSlow() { DefaultLockAlgorithm::safepointSlow(m_byte); } } // namespace WTF