mutex.h

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/*
 * Copyright (C) 2000-2004 by ETH Zurich
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 * modification, are permitted provided that the following conditions
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 *    notice, this list of conditions and the following disclaimer in the
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 *    from this software without specific prior written permission.
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/* mutex.c - a nut/os implementation of recursive mutex functions
 *
 * 2004.05.06 Matthias Ringwald <[e-mail]>
 *
 */
/*
 * $Log: mutex.h,v $
 * Revision 1.3.2.1  2006/01/06 14:20:05  haraldkipp
 * Added missing prototype for NutMutexDestroy. Thanks to Matthias Ringwald.
 *
 * Revision 1.4  2005/12/22 09:36:25  freckle
 * added missing prototype for NutMutexDestroy
 *
 * Revision 1.3  2005/08/02 17:46:49  haraldkipp
 * Major API documentation update.
 *
 * Revision 1.2  2004/05/18 18:38:14  drsung
 * Added $Log keyword for CVS and avoid multiple inclusion of header file.
 *
 */

#ifndef _SYS_MUTEX_H
#define _SYS_MUTEX_H

#include <sys/types.h>
#include <sys/thread.h>

/*!
 * \addtogroup xgMutex
 */
/*@{*/

#ifdef __cplusplus
extern "C" {
#endif

/*!
 * \brief Recursive mutex type.
 */
    typedef struct _MUTEX MUTEX;

/*!
 * \struct _mutex mutex.h sys/mutex.h
 * \brief Recursive mutex.
 *
 */
    struct _MUTEX {
        HANDLE qhp;             /*!< \brief Queue to wait, if mutex is not free. */
        NUTTHREADINFO *thread;  /*!< \brief Thread who owns the mutex */
        u_short count;          /*!< \brief Lock counter. */
    };

    extern void NutMutexInit(MUTEX * mutex);
    extern void NutMutexLock(MUTEX * mutex);
    extern int NutMutexUnlock(MUTEX * mutex);
    extern int NutMutexTrylock(MUTEX * mutex);
    extern int NutMutexDestroy(MUTEX * mutex);
#ifdef __cplusplus
}
#endif

/*@}*/

#endif /* #ifndef _SYS_MUTEX_H */