MovieLoader.h

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// 
//   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Free Software
//   Foundation, Inc
// 
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

#ifndef GNASH_MOVIE_LOADER_H
#define GNASH_MOVIE_LOADER_H

#include "URL.h"
#include "as_object.h" 
#include "MovieClip.h" 

#include <boost/intrusive_ptr.hpp>
#include <list>
#include <string>
#include <boost/noncopyable.hpp>
#include <boost/thread/thread.hpp>
#include <boost/thread/condition.hpp>
#include <boost/thread/barrier.hpp>

// Forward declarations
namespace gnash {
    class movie_root;
    class movie_definition;
}

namespace gnash {

//
class DSOEXPORT MovieLoader : boost::noncopyable {

public:

    MovieLoader(movie_root& mr);

    ~MovieLoader();

    //
    //
    void loadMovie(const std::string& url, const std::string& target,
            const std::string& data, MovieClip::VariablesMethod method,
            as_object* handler=0);

    void clear();

    void processCompletedRequests();

    void setReachable() const;

private:

    class Request : boost::noncopyable {
    public:
        Request(const URL& u, const std::string& t,
                const std::string* postdata, as_object* handler)
                :
                _target(t),
                _url(u),
                _usePost(false),
                _mdef(0),
                _mutex(),
                _handler(handler),
                _completed(false)
        {
            if ( postdata )
            {
                _postData = *postdata;
                _usePost = true;
            }
        }

        const std::string& getTarget() const { return _target; }
        const URL& getURL() const { return _url; }
        const std::string& getPostData() const { return _postData; }
        bool usePost() const { return _usePost; }
        as_object* getHandler() const { return _handler; }
        void setReachable() const {
            if (_handler) _handler->setReachable();
        }

        //
        bool getCompleted(boost::intrusive_ptr<movie_definition>& md) const
        {
            boost::mutex::scoped_lock lock(_mutex);
            md = _mdef;
            return _completed;
        }

        bool pending() const
        {
            boost::mutex::scoped_lock lock(_mutex);
            return !_completed;
        }

        bool completed() const
        {
            boost::mutex::scoped_lock lock(_mutex);
            return _completed;
        }

        //
        void setCompleted(boost::intrusive_ptr<movie_definition> md)
        {
            boost::mutex::scoped_lock lock(_mutex);
            _mdef = md;
            _completed = true;
        }

    private:
        std::string _target;
        URL _url;
        bool _usePost;
        std::string _postData;
        boost::intrusive_ptr<movie_definition> _mdef;
        mutable boost::mutex _mutex;
        as_object* _handler;
        bool _completed;
    };

    typedef std::list<Request*> Requests;
    Requests _requests;

        mutable boost::mutex _requestsMutex;

    void processRequests();
    void processRequest(Request& r);
    void clearRequests();

    //
    bool processCompletedRequest(const Request& r);

    bool killed();

    bool _killed;

        boost::mutex _killMutex;

    boost::condition _wakeup;

    movie_root& _movieRoot;

    std::auto_ptr<boost::thread> _thread;

        // Barrier to ensure that _thread
        // is initialized before the loader thread
        // continues execution
        boost::barrier _barrier;

};

} // namespace gnash

#endif // GNASH_MOVIE_LOADER_H