/*

 * 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 PluginMainThreadScheduler_h

#define PluginMainThreadScheduler_h

#include <wtf/Deque.h>

#include <wtf/HashMap.h>

#include <wtf/MainThread.h>

#include <wtf/Threading.h>

typedef struct _NPP NPP_t;

typedef NPP_t* NPP;

namespace WebCore {

class PluginMainThreadScheduler : public Noncopyable {

public:

    typedef void MainThreadFunction(void*);

    static PluginMainThreadScheduler& scheduler();

    void scheduleCall(NPP, MainThreadFunction*, void* userData);

    void registerPlugin(NPP);

    void unregisterPlugin(NPP);

private:

    PluginMainThreadScheduler();

    void dispatchCalls();

    class Call;

    void dispatchCallsForPlugin(NPP, const Deque<Call>& calls);

    typedef HashMap<NPP, Deque<Call> > CallQueueMap;

    static void mainThreadCallback(void* context);

    class Call {

    public:

        Call(MainThreadFunction* function, void* userData)

            : m_function(function)

            , m_userData(userData)

        {

        }

        void performCall() const

        {

            m_function(m_userData);

        }

    private:

        MainThreadFunction* m_function;

        void* m_userData;

    };

    bool m_callPending;

    CallQueueMap m_callQueueMap;

    Mutex m_queueMutex;

};

} // namespace WebCore

#endif // PluginMainThreadScheduler_h