StorageThread.h   [plain text]

/*
 * 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.
 */

#ifndef StorageThread_h
#define StorageThread_h

#include <wtf/Functional.h>
#include <wtf/HashSet.h>
#include <wtf/MessageQueue.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/PassRefPtr.h>
#include <wtf/Threading.h>

namespace WebCore {

class StorageAreaSync;
class StorageTask;

class StorageThread {
    WTF_MAKE_NONCOPYABLE(StorageThread); WTF_MAKE_FAST_ALLOCATED;
public:
    static PassOwnPtr<StorageThread> create();
    ~StorageThread();

    bool start();
    void terminate();

    void dispatch(const Function<void()>&);

    static void releaseFastMallocFreeMemoryInAllThreads();

private:
    StorageThread();

    // Called on background thread.
    static void threadEntryPointCallback(void*);
    void threadEntryPoint();

    // Background thread part of the terminate procedure.
    void performTerminate();

    ThreadIdentifier m_threadID;
    MessageQueue<Function<void ()> > m_queue;
};

} // namespace WebCore

#endif // StorageThread_h