mirror of
https://github.com/darlinghq/darling-WTF.git
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77 lines
2.9 KiB
C++
77 lines
2.9 KiB
C++
/*
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* Copyright (C) 2009, 2011 Google Inc. All rights reserved.
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* Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "ThreadHolder.h"
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#include <wtf/Threading.h>
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namespace WTF {
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void ThreadHolder::initializeOnce()
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{
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threadSpecificKeyCreate(&m_key, destruct);
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}
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ThreadHolder* ThreadHolder::current()
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{
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ASSERT(m_key != InvalidThreadSpecificKey);
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return static_cast<ThreadHolder*>(threadSpecificGet(m_key));
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}
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void ThreadHolder::initialize(Thread& thread)
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{
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if (!current()) {
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// Ideally we'd have this as a release assert everywhere, but that would hurt performance.
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// Having this release assert here means that we will catch "didn't call
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// WTF::initializeThreading() soon enough" bugs in release mode.
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ASSERT(m_key != InvalidThreadSpecificKey);
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threadSpecificSet(m_key, new ThreadHolder(thread));
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}
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}
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void ThreadHolder::destruct(void* data)
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{
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ThreadHolder* threadIdentifierData = static_cast<ThreadHolder*>(data);
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ASSERT(threadIdentifierData);
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if (threadIdentifierData->m_isDestroyedOnce) {
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delete threadIdentifierData;
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return;
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}
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threadIdentifierData->m_isDestroyedOnce = true;
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// Re-setting the value for key causes another destruct() call after all other thread-specific destructors were called.
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threadSpecificSet(m_key, threadIdentifierData);
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}
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} // namespace WTF
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