/*

 * Copyright (C) 2009 Google Inc. All rights reserved.

 *

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 * 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

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 * 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

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 */

#ifndef DefaultSharedWorkerRepository_h

#define DefaultSharedWorkerRepository_h

#if ENABLE(SHARED_WORKERS)

#include "ExceptionCode.h"

#include "StringHash.h"

#include <wtf/HashMap.h>

#include <wtf/Noncopyable.h>

#include <wtf/PassOwnPtr.h>

#include <wtf/PassRefPtr.h>

#include <wtf/RefPtr.h>

#include <wtf/Threading.h>

namespace WebCore {

    class Document;

    class KURL;

    class MessagePortChannel;

    class ScriptExecutionContext;

    class SharedWorker;

    class SharedWorkerProxy;

    class String;

    // Platform-specific implementation of the SharedWorkerRepository static interface.

    class DefaultSharedWorkerRepository : public Noncopyable {

    public:

        // Invoked once the worker script has been loaded to fire up the worker thread.

        void workerScriptLoaded(SharedWorkerProxy&, const String& userAgent, const String& workerScript, PassOwnPtr<MessagePortChannel>);

        // Internal implementation of SharedWorkerRepository::connect()

        void connectToWorker(PassRefPtr<SharedWorker>, PassOwnPtr<MessagePortChannel>, const KURL&, const String& name, ExceptionCode&);

        // Notification that a document has been detached.

        void documentDetached(Document*);

        // Removes the passed SharedWorkerProxy from the repository.

        void removeProxy(SharedWorkerProxy*);

        bool hasSharedWorkers(Document*);

        static DefaultSharedWorkerRepository& instance();

    private:

        DefaultSharedWorkerRepository();

        ~DefaultSharedWorkerRepository();

        PassRefPtr<SharedWorkerProxy> getProxy(const String& name, const KURL&);

        // Mutex used to protect internal data structures.

        Mutex m_lock;

        // List of shared workers. Expectation is that there will be a limited number of shared workers, and so tracking them in a Vector is more efficient than nested HashMaps.

        typedef Vector<RefPtr<SharedWorkerProxy> > SharedWorkerProxyRepository;

        SharedWorkerProxyRepository m_proxies;

    };

} // namespace WebCore

#endif // ENABLE(SHARED_WORKERS)

#endif // DefaultSharedWorkerRepository_h