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/**
* @file
*
* @brief Waiting on a Condition
* @ingroup POSIXAPI
*/
/*
* COPYRIGHT (c) 1989-2008.
* 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/todimpl.h>
#include <rtems/posix/condimpl.h>
#include <rtems/posix/muteximpl.h>
/*
* 11.4.4 Waiting on a Condition, P1003.1c/Draft 10, p. 105
*/
int pthread_cond_timedwait(
pthread_cond_t *cond,
pthread_mutex_t *mutex,
const struct timespec *abstime
)
{
Watchdog_Interval ticks;
bool already_timedout;
TOD_Absolute_timeout_conversion_results status;
/*
* POSIX requires that blocking calls with timeouts that take
* an absolute timeout must ignore issues with the absolute
* time provided if the operation would otherwise succeed.
* So we check the abstime provided, and hold on to whether it
* is valid or not. If it isn't correct and in the future,
* then we do a polling operation and convert the UNSATISFIED
* status into the appropriate error.
*/
already_timedout = false;
status = _TOD_Absolute_timeout_to_ticks(abstime, &ticks);
if ( status == TOD_ABSOLUTE_TIMEOUT_INVALID )
return EINVAL;
if ( status == TOD_ABSOLUTE_TIMEOUT_IS_IN_PAST ||
status == TOD_ABSOLUTE_TIMEOUT_IS_NOW )
already_timedout = true;
return _POSIX_Condition_variables_Wait_support(
cond,
mutex,
ticks,
already_timedout
);
}
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