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/*
* Copyright (C) 2009, 2011 Google 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT
* OWNER 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"
#if USE(PTHREADS)
#include "ThreadIdentifierDataPthreads.h"
#include "Threading.h"
#if OS(HURD)
// PTHREAD_KEYS_MAX is not defined in bionic nor in Hurd, so explicitly define it here.
#define PTHREAD_KEYS_MAX 1024
#else
#include <limits.h>
#endif
namespace WTF {
pthread_key_t ThreadIdentifierData::m_key = PTHREAD_KEYS_MAX;
void threadDidExit(ThreadIdentifier);
ThreadIdentifierData::~ThreadIdentifierData()
{
threadDidExit(m_identifier);
}
void ThreadIdentifierData::initializeOnce()
{
if (pthread_key_create(&m_key, destruct))
CRASH();
}
ThreadIdentifier ThreadIdentifierData::identifier()
{
ASSERT(m_key != PTHREAD_KEYS_MAX);
ThreadIdentifierData* threadIdentifierData = static_cast<ThreadIdentifierData*>(pthread_getspecific(m_key));
return threadIdentifierData ? threadIdentifierData->m_identifier : 0;
}
void ThreadIdentifierData::initialize(ThreadIdentifier id)
{
ASSERT(!identifier());
// Ideally we'd have this as a release assert everywhere, but that would hurt performane.
// Having this release assert here means that we will catch "didn't call
// WTF::initializeThreading() soon enough" bugs in release mode.
RELEASE_ASSERT(m_key != PTHREAD_KEYS_MAX);
pthread_setspecific(m_key, new ThreadIdentifierData(id));
}
void ThreadIdentifierData::destruct(void* data)
{
ThreadIdentifierData* threadIdentifierData = static_cast<ThreadIdentifierData*>(data);
ASSERT(threadIdentifierData);
if (threadIdentifierData->m_isDestroyedOnce) {
delete threadIdentifierData;
return;
}
threadIdentifierData->m_isDestroyedOnce = true;
// Re-setting the value for key causes another destruct() call after all other thread-specific destructors were called.
pthread_setspecific(m_key, threadIdentifierData);
}
} // namespace WTF
#endif // USE(PTHREADS)
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