/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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#ifndef _OSL_MUTEX_H_
#define _OSL_MUTEX_H_

#include "sal/config.h"

#include "sal/saldllapi.h"
#include "sal/types.h"

#ifdef __cplusplus
extern "C" {
#endif

struct _oslMutexImpl;
typedef struct _oslMutexImpl * oslMutex;

/** Create a thread-local mutex.
    @return 0 if the mutex could not be created, otherwise a handle to the mutex.
*/
SAL_DLLPUBLIC oslMutex SAL_CALL osl_createMutex(void);

/** Release the OS-structures and free mutex data-structure.
    @param Mutex the mutex-handle
*/
SAL_DLLPUBLIC void SAL_CALL osl_destroyMutex(oslMutex Mutex);

/** Acquire the mutex, block if already acquired by another thread.
    @param Mutex handle to a created mutex.
    @return False if system-call fails.
*/
SAL_DLLPUBLIC sal_Bool SAL_CALL osl_acquireMutex(oslMutex Mutex);

/** Try to acquire the mutex without blocking.
    @param Mutex handle to a created mutex.
    @return False if it could not be acquired.
*/
SAL_DLLPUBLIC sal_Bool SAL_CALL osl_tryToAcquireMutex(oslMutex Mutex);

/** Release the mutex.
    @param Mutex handle to a created mutex.
    @return False if system-call fails.
*/
SAL_DLLPUBLIC sal_Bool SAL_CALL osl_releaseMutex(oslMutex Mutex);

/** Returns a unique and global mutex.
    @return the global mutex.
*/
SAL_DLLPUBLIC oslMutex * SAL_CALL osl_getGlobalMutex(void);

#ifdef __cplusplus
}
#endif

#endif  /* _OSL_MUTEX_H_ */

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