processorcommandqueue.h

Linux下比较早的基于命令行的DVD播放器

//
// Copyright (c) 2003 by Istv醤 V醨adi
//
// This file is part of dxr3Player, a DVD player written specifically 
// for the DXR3 (aka Hollywood+) decoder card.

// 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 2 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#ifndef DXR3PLAYER_DVD_VM_PROCESSORCOMMANDQUEUE_H
#define DXR3PLAYER_DVD_VM_PROCESSORCOMMANDQUEUE_H
//------------------------------------------------------------------------------

#include "util/DefaultAllocator.h"

#include <list>

//------------------------------------------------------------------------------

namespace dvd { namespace vm {

//------------------------------------------------------------------------------

class Processor;
class ProcessorCommand;
class State;

//------------------------------------------------------------------------------

/**
 * Queue for processor commands.
 */
class ProcessorCommandQueue
{
private:
    /**
     * The type of the command list.
     */
    typedef std::list<ProcessorCommand*, DefaultAllocatorTemplate<ProcessorCommand*> > commandList_t;
    
    /**
     * The command list.
     */
    commandList_t commandList;

public:
    /**
     * Reset the queue by erasing all entries.
     */
    void reset();

    /**
     * Put the given command into the queue.
     */
    void put(ProcessorCommand* command);

    /**
     * Set the given processor's state with the command having the
     * given ID. That command should be the first one and will be
     * removed from the queue.
     */
    void setState(Processor& processor, size_t commandID);

    /**
     * Update the states in the commands as long as the positions
     * contained in them do not change.
     *
     * @paam state the originating state. Will be updated to the last
     * state, if all states could be updated,
     *
     * @return if all states could be updated
     */
    bool updateStates(State& state);
};

//------------------------------------------------------------------------------

} /* namespace dvd::vm */ } /* namespace dvd */

//------------------------------------------------------------------------------
#endif // DXR3PLAYER_DVD_VM_PROCESSORCOMMANDQUEUE_H

// Local variables:
// mode: c++
// End: