beosthread.h

FreeAMP(MP3播放)程序源代码-用来研究MP3解码

/*____________________________________________________________________________
	
	FreeAmp - The Free MP3 Player

	Portions Copyright (C) 1998-1999 EMusic.com

	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., 675 Mass Ave, Cambridge, MA 02139, USA.
	
	$Id: beosthread.h,v 1.6 2000/07/10 04:19:05 hiro Exp $
____________________________________________________________________________*/

#ifndef INCLUDED_BEOS_THREAD_H
#define INCLUDED_BEOS_THREAD_H

#include <kernel/OS.h>
#include <support/Locker.h>
#include "thread.h"

#include "mutex.h"

class beosThread : public Thread
{
public:
                        beosThread();
    virtual             ~beosThread();

    virtual bool        Create(thread_function function, void* arg,
                               bool detach = false);
    virtual void        Destroy();
    virtual void        Suspend();
    virtual void        Resume();
    virtual void        Join();
    virtual uint32      GetPriority( void ) const;
    virtual uint32      SetPriority( uint32 priority );
    virtual void        DumpThreadInfo( void ) const;

    static int32        internalThreadFunction(void *);
    void *              InternalThreadFunction();

protected:
    bool                Lock( void );
    void                Unlock( void );

private:
    uint32              m_priority;
    thread_id           m_threadHandle;
    unsigned            m_threadId;
    bool                m_suspended;
    BLocker             m_lock;
    thread_function     m_function;
    void *              m_arg;
};

// Inline functions

inline bool
beosThread::Lock( void )
{
    return m_lock.Lock();
}

inline void
beosThread::Unlock( void )
{
    m_lock.Unlock();
}

// Utility functions.

inline
int32
beos_priority( uint32 freeamp_prio )
{
#if 0
    switch ( freeamp_prio ) {
    case Idle:
        return B_NORMAL_PRIORITY;
        break;
    case Low:
        return B_NORMAL_PRIORITY;
        break;
    case BelowNormal:
        return B_NORMAL_PRIORITY;
        break;
    case Normal:
        return B_NORMAL_PRIORITY;
        break;
    case AboveNormal:
        return B_NORMAL_PRIORITY;
        break;
    case High:
        return B_NORMAL_PRIORITY;
        break;
    case Critical:
        return B_NORMAL_PRIORITY;
        break;
    default:
        return B_NORMAL_PRIORITY;
        break;
    }
#endif
    return B_NORMAL_PRIORITY;
}

#endif /* _BEOS_THREAD_H */ vi: set ts=4: