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/* rtems/posix/cond.h
*
* This include file contains all the private support information for
* POSIX condition variables.
*
* COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
* On-Line Applications Research Corporation (OAR).
* All rights assigned to U.S. Government, 1994.
*
* This material may be reproduced by or for the U.S. Government pursuant
* to the copyright license under the clause at DFARS 252.227-7013. This
* notice must appear in all copies of this file and its derivatives.
*
* $Id$
*/
#ifndef __RTEMS_POSIX_CONDITION_VARIABLES_h
#define __RTEMS_POSIX_CONDITION_VARIABLES_h
#ifdef __cplusplus
extern "C" {
#endif
#include <rtems/score/object.h>
#include <rtems/score/threadq.h>
/*
* Constant to indicate condition variable does not currently have
* a mutex assigned to it.
*/
#define POSIX_CONDITION_VARIABLES_NO_MUTEX 0
/*
* Data Structure used to manage a POSIX condition variable
*/
typedef struct {
Objects_Control Object;
int process_shared;
pthread_mutex_t Mutex;
Thread_queue_Control Wait_queue;
} POSIX_Condition_variables_Control;
/*
* The following defines the information control block used to manage
* this class of objects.
*/
POSIX_EXTERN Objects_Information _POSIX_Condition_variables_Information;
/*
* _POSIX_Condition_variables_Manager_initialization
*
* DESCRIPTION:
*
* This routine performs the initialization necessary for this manager.
*/
void _POSIX_Condition_variables_Manager_initialization(
unsigned32 maximum_condition_variables
);
/*
* _POSIX_Condition_variables_Allocate
*
* DESCRIPTION:
*
* This function allocates a condition variable control block from
* the inactive chain of free condition variable control blocks.
*/
RTEMS_INLINE_ROUTINE POSIX_Condition_variables_Control *
_POSIX_Condition_variables_Allocate( void );
/*
* _POSIX_Condition_variables_Free
*
* DESCRIPTION:
*
* This routine frees a condition variable control block to the
* inactive chain of free condition variable control blocks.
*/
RTEMS_INLINE_ROUTINE void _POSIX_Condition_variables_Free (
POSIX_Condition_variables_Control *the_condition_variable
);
/*
* _POSIX_Condition_variables_Get
*
* DESCRIPTION:
*
* This function maps condition variable IDs to condition variable control
* blocks. If ID corresponds to a local condition variable, then it returns
* the_condition variable control pointer which maps to ID and location
* is set to OBJECTS_LOCAL. if the condition variable ID is global and
* resides on a remote node, then location is set to OBJECTS_REMOTE,
* and the_condition variable is undefined. Otherwise, location is set
* to OBJECTS_ERROR and the_condition variable is undefined.
*/
RTEMS_INLINE_ROUTINE POSIX_Condition_variables_Control *_POSIX_Condition_variables_Get (
Objects_Id *id,
Objects_Locations *location
);
/*
* _POSIX_Condition_variables_Is_null
*
* DESCRIPTION:
*
* This function returns TRUE if the_condition variable is NULL
* and FALSE otherwise.
*/
RTEMS_INLINE_ROUTINE boolean _POSIX_Condition_variables_Is_null (
POSIX_Condition_variables_Control *the_condition_variable
);
#include <rtems/posix/cond.inl>
#include <rtems/posix/condmp.h>
#ifdef __cplusplus
}
#endif
#endif
/* end of include file */
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