diff options
author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1999-11-02 17:19:23 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1999-11-02 17:19:23 +0000 |
commit | 96c041c42ba7cf9489113bb337c8dc9b344f152e (patch) | |
tree | bd6b328f8cd3b82963d3b27a05403c6fe11699bb /cpukit/posix/src/mutexunlock.c | |
parent | Split mqueue into multiple files. (diff) | |
download | rtems-96c041c42ba7cf9489113bb337c8dc9b344f152e.tar.bz2 |
Split mutex.c into multiple files.
Diffstat (limited to 'cpukit/posix/src/mutexunlock.c')
-rw-r--r-- | cpukit/posix/src/mutexunlock.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/cpukit/posix/src/mutexunlock.c b/cpukit/posix/src/mutexunlock.c new file mode 100644 index 0000000000..3f5d5a03f3 --- /dev/null +++ b/cpukit/posix/src/mutexunlock.c @@ -0,0 +1,62 @@ +/* + * $Id$ + */ + +#include <assert.h> +#include <errno.h> +#include <pthread.h> + +#include <rtems/system.h> +#include <rtems/score/coremutex.h> +#include <rtems/score/watchdog.h> +#if defined(RTEMS_MULTIPROCESSING) +#include <rtems/score/mpci.h> +#endif +#include <rtems/posix/mutex.h> +#include <rtems/posix/priority.h> +#include <rtems/posix/time.h> + +/*PAGE + * + * 11.3.3 Locking and Unlocking a Mutex, P1003.1c/Draft 10, p. 93 + * + * NOTE: P1003.4b/D8 adds pthread_mutex_timedlock(), p. 29 + */ + +int pthread_mutex_unlock( + pthread_mutex_t *mutex +) +{ + register POSIX_Mutex_Control *the_mutex; + Objects_Locations location; + CORE_mutex_Status status; + + the_mutex = _POSIX_Mutex_Get( mutex, &location ); + switch ( location ) { + case OBJECTS_REMOTE: +#if defined(RTEMS_MULTIPROCESSING) + return _POSIX_Mutex_MP_Send_request_packet( + POSIX_MUTEX_MP_RELEASE_REQUEST, + *mutex, + 0, /* Not used */ + MPCI_DEFAULT_TIMEOUT + ); +#endif + case OBJECTS_ERROR: + return EINVAL; + case OBJECTS_LOCAL: + status = _CORE_mutex_Surrender( + &the_mutex->Mutex, + the_mutex->Object.id, +#if defined(RTEMS_MULTIPROCESSING) + POSIX_Threads_mutex_MP_support +#else + NULL +#endif + ); + _Thread_Enable_dispatch(); + return _POSIX_Mutex_From_core_mutex_status( status ); + break; + } + return POSIX_BOTTOM_REACHED(); +} |