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/*
* Copyright (C) 2008 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 "StorageThread.h"
#include "StorageAreaSync.h"
#include <wtf/AutodrainedPool.h>
#include <wtf/HashSet.h>
#include <wtf/MainThread.h>
namespace WebCore {
static HashSet<StorageThread*>& activeStorageThreads()
{
ASSERT(isMainThread());
DEFINE_STATIC_LOCAL(HashSet<StorageThread*>, threads, ());
return threads;
}
PassOwnPtr<StorageThread> StorageThread::create()
{
return adoptPtr(new StorageThread);
}
StorageThread::StorageThread()
: m_threadID(0)
{
ASSERT(isMainThread());
}
StorageThread::~StorageThread()
{
ASSERT(isMainThread());
ASSERT(!m_threadID);
}
bool StorageThread::start()
{
ASSERT(isMainThread());
if (!m_threadID)
m_threadID = createThread(StorageThread::threadEntryPointCallback, this, "WebCore: LocalStorage");
activeStorageThreads().add(this);
return m_threadID;
}
void StorageThread::threadEntryPointCallback(void* thread)
{
static_cast<StorageThread*>(thread)->threadEntryPoint();
}
void StorageThread::threadEntryPoint()
{
ASSERT(!isMainThread());
while (OwnPtr<Function<void ()> > function = m_queue.waitForMessage()) {
AutodrainedPool pool;
(*function)();
}
}
void StorageThread::dispatch(const Function<void ()>& function)
{
ASSERT(isMainThread());
ASSERT(!m_queue.killed() && m_threadID);
m_queue.append(adoptPtr(new Function<void ()>(function)));
}
void StorageThread::terminate()
{
ASSERT(isMainThread());
ASSERT(!m_queue.killed() && m_threadID);
activeStorageThreads().remove(this);
// Even in weird, exceptional cases, don't wait on a nonexistent thread to terminate.
if (!m_threadID)
return;
m_queue.append(adoptPtr(new Function<void ()>((bind(&StorageThread::performTerminate, this)))));
waitForThreadCompletion(m_threadID);
ASSERT(m_queue.killed());
m_threadID = 0;
}
void StorageThread::performTerminate()
{
ASSERT(!isMainThread());
m_queue.kill();
}
void StorageThread::releaseFastMallocFreeMemoryInAllThreads()
{
HashSet<StorageThread*>& threads = activeStorageThreads();
for (HashSet<StorageThread*>::iterator it = threads.begin(), end = threads.end(); it != end; ++it)
(*it)->dispatch(bind(WTF::releaseFastMallocFreeMemory));
}
}
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