LoadVariablesThread.h

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// 
//   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
//   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_LOADVARIABLESTHREAD_H
#define GNASH_LOADVARIABLESTHREAD_H

#include <string>
#include <map>
#include <atomic>
#include <cassert>
#include <memory>
#include <thread>

namespace gnash {
    class StreamProvider;
    class IOChannel;
    class URL;
}

namespace gnash {

// Exception thrown by LoadVariablesThread constructor if unable to connect
// to the stream input.
class NetworkException {};

//
class LoadVariablesThread
{
public:
        typedef std::map<std::string, std::string> ValuesMap;

        enum class Status : std::int8_t { STARTED = 0, FINISHED, CANCEL_REQUESTED };

        //
        LoadVariablesThread(const StreamProvider& sp, const URL& url);

        //
        LoadVariablesThread(const StreamProvider& sp, const URL& url,
            const std::string& postdata);

        ~LoadVariablesThread();

        ValuesMap getValues()
        {
                assert(completed());
                return _vals;
        }

        bool completed()
        {
                return static_cast<Status>(_status.load()) == Status::FINISHED;
        }

private:

        LoadVariablesThread& operator==(const LoadVariablesThread&); 
        LoadVariablesThread(const LoadVariablesThread&); 

        void startThread(std::unique_ptr<IOChannel> stream);

        //
        static ValuesMap completeLoad(std::unique_ptr<IOChannel> stream,
                                      const std::atomic<int8_t>& status);

        ValuesMap _vals;

        std::thread _thread;
        std::atomic<int8_t> _status; // enum class Status; int for compatibility.
};

} // namespace gnash

#endif // GNASH_LOADVARIABLESTHREAD_H