/*

 * Copyright (C) 2009 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.

 */

#ifndef V8GCController_h

#define V8GCController_h

#include <v8.h>

namespace WebCore {

#ifndef NDEBUG

#define GlobalHandleTypeList(V)   \

    V(PROXY)                      \

    V(NPOBJECT)                   \

    V(SCHEDULED_ACTION)           \

    V(EVENT_LISTENER)             \

    V(NODE_FILTER)                \

    V(SCRIPTINSTANCE)             \

    V(SCRIPTVALUE)                \

    V(DATASOURCE)

    // Host information of persistent handles.

    enum GlobalHandleType {

#define ENUM(name) name,

        GlobalHandleTypeList(ENUM)

#undef ENUM

    };

    class GlobalHandleInfo {

    public:

        GlobalHandleInfo(void* host, GlobalHandleType type) : m_host(host), m_type(type) { }

        void* m_host;

        GlobalHandleType m_type;

    };

#endif // NDEBUG

    class V8GCController {

    public:

        // Protect/Unprotect JS wrappers of a DOM object.

        static void gcProtect(void* domObject);

        static void gcUnprotect(void* domObject);

#ifndef NDEBUG

        // For debugging and leak detection purpose.

        static void registerGlobalHandle(GlobalHandleType, void*, v8::Persistent<v8::Value>);

        static void unregisterGlobalHandle(void*, v8::Persistent<v8::Value>);

#endif

        static void gcPrologue();

        static void gcEpilogue();

        static void checkMemoryUsage();

    private:

        // Estimate of current working set.

        static int workingSetEstimateMB;

    };

}

#endif // V8GCController_h