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/*
* Copyright (C) 2010 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 ENABLE(BLOB) || ENABLE(FILE_SYSTEM)
#include "FileThread.h"
#include "AutodrainedPool.h"
#include "Logging.h"
namespace WebCore {
FileThread::FileThread()
: m_threadID(0)
{
m_selfRef = this;
}
FileThread::~FileThread()
{
ASSERT(m_queue.killed());
}
bool FileThread::start()
{
MutexLocker lock(m_threadCreationMutex);
if (m_threadID)
return true;
m_threadID = createThread(FileThread::fileThreadStart, this, "WebCore: File");
return m_threadID;
}
void FileThread::stop()
{
m_queue.kill();
}
void FileThread::postTask(PassOwnPtr<Task> task)
{
m_queue.append(task);
}
class SameInstancePredicate {
public:
SameInstancePredicate(const void* instance) : m_instance(instance) { }
bool operator()(FileThread::Task* task) const { return task->instance() == m_instance; }
private:
const void* m_instance;
};
void FileThread::unscheduleTasks(const void* instance)
{
SameInstancePredicate predicate(instance);
m_queue.removeIf(predicate);
}
void* FileThread::fileThreadStart(void* arg)
{
FileThread* fileThread = static_cast<FileThread*>(arg);
return fileThread->runLoop();
}
void* FileThread::runLoop()
{
{
// Wait for FileThread::start() to complete to have m_threadID
// established before starting the main loop.
MutexLocker lock(m_threadCreationMutex);
LOG(FileAPI, "Started FileThread %p", this);
}
AutodrainedPool pool;
while (OwnPtr<Task> task = m_queue.waitForMessage()) {
task->performTask();
pool.cycle();
}
LOG(FileAPI, "About to detach thread %i and clear the ref to FileThread %p, which currently has %i ref(s)", m_threadID, this, refCount());
detachThread(m_threadID);
// Clear the self refptr, possibly resulting in deletion
m_selfRef = 0;
return 0;
}
} // namespace WebCore
#endif // ENABLE(BLOB) || ENABLE(FILE_SYSTEM)
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