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/*
* $Id$
*/
#include <stdarg.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <semaphore.h>
#include <limits.h>
#include <rtems/system.h>
#include <rtems/score/object.h>
#include <rtems/posix/semaphore.h>
#include <rtems/posix/time.h>
#include <rtems/seterr.h>
/*PAGE
*
* _POSIX_Semaphore_Wait_support
*/
int _POSIX_Semaphore_Wait_support(
sem_t *sem,
boolean blocking,
Watchdog_Interval timeout
)
{
register POSIX_Semaphore_Control *the_semaphore;
Objects_Locations location;
the_semaphore = _POSIX_Semaphore_Get( sem, &location );
switch ( location ) {
case OBJECTS_ERROR:
set_errno_and_return_minus_one( EINVAL );
case OBJECTS_REMOTE:
_Thread_Dispatch();
set_errno_and_return_minus_one( EINVAL );
case OBJECTS_LOCAL:
_CORE_semaphore_Seize(
&the_semaphore->Semaphore,
the_semaphore->Object.id,
blocking,
timeout
);
_Thread_Enable_dispatch();
switch ( _Thread_Executing->Wait.return_code ) {
case CORE_SEMAPHORE_STATUS_SUCCESSFUL:
break;
case CORE_SEMAPHORE_STATUS_UNSATISFIED_NOWAIT:
set_errno_and_return_minus_one( EAGAIN );
case CORE_SEMAPHORE_WAS_DELETED:
set_errno_and_return_minus_one( EAGAIN );
case CORE_SEMAPHORE_TIMEOUT:
set_errno_and_return_minus_one( ETIMEDOUT );
break;
case CORE_SEMAPHORE_MAXIMUM_COUNT_EXCEEDED:
/*
* This error can not occur since we set the maximum
* count to the largest value the count can hold.
*/
break;
}
}
return 0;
}
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