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/**
* @file
*
* @brief Initialize a Condition Variable
* @ingroup POSIXAPI
*/
/*
* COPYRIGHT (c) 1989-2007.
* 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.rtems.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <pthread.h>
#include <errno.h>
#include <rtems/system.h>
#include <rtems/score/watchdog.h>
#include <rtems/posix/condimpl.h>
#include <rtems/posix/time.h>
#include <rtems/posix/muteximpl.h>
/**
* 11.4.2 Initializing and Destroying a Condition Variable,
* P1003.1c/Draft 10, p. 87
*/
int pthread_cond_init(
pthread_cond_t *cond,
const pthread_condattr_t *attr
)
{
POSIX_Condition_variables_Control *the_cond;
const pthread_condattr_t *the_attr;
if ( attr ) the_attr = attr;
else the_attr = &_POSIX_Condition_variables_Default_attributes;
/*
* Be careful about attributes when global!!!
*/
if ( the_attr->process_shared == PTHREAD_PROCESS_SHARED )
return EINVAL;
if ( !the_attr->is_initialized )
return EINVAL;
the_cond = _POSIX_Condition_variables_Allocate();
if ( !the_cond ) {
_Objects_Allocator_unlock();
return ENOMEM;
}
the_cond->process_shared = the_attr->process_shared;
the_cond->Mutex = POSIX_CONDITION_VARIABLES_NO_MUTEX;
_Thread_queue_Initialize(
&the_cond->Wait_queue,
THREAD_QUEUE_DISCIPLINE_FIFO
);
_Objects_Open_u32(
&_POSIX_Condition_variables_Information,
&the_cond->Object,
0
);
*cond = the_cond->Object.id;
_Objects_Allocator_unlock();
return 0;
}
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