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/* rtems/posix/mutex.h
*
* This include file contains all the private support information for
* POSIX mutex's.
*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#ifndef __RTEMS_POSIX_MUTEX_h
#define __RTEMS_POSIX_MUTEX_h
#ifdef __cplusplus
extern "C" {
#endif
#include <rtems/score/coremutex.h>
#include <pthread.h>
/*
* Data Structure used to manage a POSIX mutex
*/
typedef struct {
Objects_Control Object;
int process_shared;
CORE_mutex_Control Mutex;
} POSIX_Mutex_Control;
/*
* The following defines the information control block used to manage
* this class of objects.
*/
POSIX_EXTERN Objects_Information _POSIX_Mutex_Information;
/*
* The default mutex attributes structure.
*/
extern const pthread_mutexattr_t _POSIX_Mutex_Default_attributes;
/*
* _POSIX_Mutex_Manager_initialization
*
* DESCRIPTION:
*
* This routine performs the initialization necessary for this manager.
*/
void _POSIX_Mutex_Manager_initialization(
unsigned32 maximum_mutexes
);
/*
* _POSIX_Mutex_Allocate
*
* DESCRIPTION:
*
* This function allocates a mutexes control block from
* the inactive chain of free mutexes control blocks.
*/
RTEMS_INLINE_ROUTINE POSIX_Mutex_Control *_POSIX_Mutex_Allocate( void );
/*
* _POSIX_Mutex_Free
*
* DESCRIPTION:
*
* This routine frees a mutexes control block to the
* inactive chain of free mutexes control blocks.
*/
RTEMS_INLINE_ROUTINE void _POSIX_Mutex_Free (
POSIX_Mutex_Control *the_mutex
);
/*
* _POSIX_Mutex_Get
*
* DESCRIPTION:
*
* This function maps mutexes IDs to mutexes control blocks.
* If ID corresponds to a local mutexes, then it returns
* the_mutex control pointer which maps to ID and location
* is set to OBJECTS_LOCAL. if the mutexes ID is global and
* resides on a remote node, then location is set to OBJECTS_REMOTE,
* and the_mutex is undefined. Otherwise, location is set
* to OBJECTS_ERROR and the_mutex is undefined.
*/
RTEMS_INLINE_ROUTINE POSIX_Mutex_Control *_POSIX_Mutex_Get (
Objects_Id *id,
Objects_Locations *location
);
/*
* _POSIX_Mutex_Is_null
*
* DESCRIPTION:
*
* This function returns TRUE if the_mutex is NULL and FALSE otherwise.
*/
RTEMS_INLINE_ROUTINE boolean _POSIX_Mutex_Is_null (
POSIX_Mutex_Control *the_mutex
);
/*
* _POSIX_Mutex_Lock_support
*
* DESCRIPTION:
*
* A support routine which implements guts of the blocking, non-blocking, and
* timed wait version of mutex lock.
*/
int _POSIX_Mutex_Lock_support(
pthread_mutex_t *mutex,
boolean blocking,
Watchdog_Interval timeout
);
/*
* _POSIX_Mutex_From_core_mutex_status
*
* DESCRIPTION:
*
* A support routine which converts core mutex status codes into the
* appropriate POSIX status values.
*/
int _POSIX_Mutex_From_core_mutex_status(
CORE_mutex_Status status
);
#include <rtems/posix/mutex.inl>
#if defined(RTEMS_MULTIPROCESSING)
#include <rtems/posix/mutexmp.h>
#endif
#ifdef __cplusplus
}
#endif
#endif
/* end of include file */
|
