/*

 * Copyright (C) 2009 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 COMPUTER, 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 COMPUTER, 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 APIShims_h

#define APIShims_h

#include "CallFrame.h"

#include "JSLock.h"

#include <wtf/WTFThreadData.h>

namespace JSC {

class APIEntryShimWithoutLock {

protected:

    APIEntryShimWithoutLock(JSGlobalData* globalData, bool registerThread)

        : m_globalData(globalData)

        , m_entryIdentifierTable(wtfThreadData().setCurrentIdentifierTable(globalData->identifierTable))

    {

        if (registerThread)

            globalData->heap.registerThread();

        m_globalData->timeoutChecker.start();

    }

    ~APIEntryShimWithoutLock()

    {

        m_globalData->timeoutChecker.stop();

        wtfThreadData().setCurrentIdentifierTable(m_entryIdentifierTable);

    }

private:

    JSGlobalData* m_globalData;

    IdentifierTable* m_entryIdentifierTable;

};

class APIEntryShim : public APIEntryShimWithoutLock {

public:

    // Normal API entry

    APIEntryShim(ExecState* exec, bool registerThread = true)

        : APIEntryShimWithoutLock(&exec->globalData(), registerThread)

        , m_lock(exec)

    {

    }

    // JSPropertyNameAccumulator only has a globalData.

    APIEntryShim(JSGlobalData* globalData, bool registerThread = true)

        : APIEntryShimWithoutLock(globalData, registerThread)

        , m_lock(globalData->isSharedInstance() ? LockForReal : SilenceAssertionsOnly)

    {

    }

private:

    JSLock m_lock;

};

class APICallbackShim {

public:

    APICallbackShim(ExecState* exec)

        : m_dropAllLocks(exec)

        , m_globalData(&exec->globalData())

    {

        wtfThreadData().resetCurrentIdentifierTable();

    }

    ~APICallbackShim()

    {

        wtfThreadData().setCurrentIdentifierTable(m_globalData->identifierTable);

    }

private:

    JSLock::DropAllLocks m_dropAllLocks;

    JSGlobalData* m_globalData;

};

}

#endif