diff options
Diffstat (limited to 'cpukit/rtems/src/barrierrelease.c')
-rw-r--r-- | cpukit/rtems/src/barrierrelease.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/cpukit/rtems/src/barrierrelease.c b/cpukit/rtems/src/barrierrelease.c new file mode 100644 index 0000000000..8bb53b8664 --- /dev/null +++ b/cpukit/rtems/src/barrierrelease.c @@ -0,0 +1,67 @@ +/* + * Barrier Manager -- Release Tasks Waitng at a Barrier + * + * 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.com/license/LICENSE. + * + * $Id$ + */ + +#if HAVE_CONFIG_H +#include "config.h" +#endif + +#include <rtems/system.h> +#include <rtems/rtems/status.h> +#include <rtems/rtems/support.h> +#include <rtems/rtems/barrier.h> +#include <rtems/score/thread.h> +#include <rtems/score/threadq.h> + +/* + * rtems_barrier_release + * + * This directive releases all threads waiting at a barrier. + * + * Input parameters: + * id - barrier id + * released - pointer to number of threads unblocked + * + * Output parameters: + * RTEMS_SUCCESSFUL - if successful + * error code - if unsuccessful + * *released - number of threads unblocked + */ + +rtems_status_code rtems_barrier_release( + rtems_id id, + uint32_t *released +) +{ + Barrier_Control *the_barrier; + Objects_Locations location; + + if ( !released ) + return RTEMS_INVALID_ADDRESS; + + the_barrier = _Barrier_Get( id, &location ); + switch ( location ) { + + case OBJECTS_LOCAL: + *released = _CORE_barrier_Release( &the_barrier->Barrier, id, NULL ); + _Thread_Enable_dispatch(); + return RTEMS_SUCCESSFUL; + +#if defined(RTEMS_MULTIPROCESSING) + case OBJECTS_REMOTE: +#endif + case OBJECTS_ERROR: + break; + } + + return RTEMS_INVALID_ID; +} |