diff options
Diffstat (limited to 'c/src/exec/posix/src/mutexsetprioceiling.c')
-rw-r--r-- | c/src/exec/posix/src/mutexsetprioceiling.c | 57 |
1 files changed, 49 insertions, 8 deletions
diff --git a/c/src/exec/posix/src/mutexsetprioceiling.c b/c/src/exec/posix/src/mutexsetprioceiling.c index 559d50852f..ff9229f5ec 100644 --- a/c/src/exec/posix/src/mutexsetprioceiling.c +++ b/c/src/exec/posix/src/mutexsetprioceiling.c @@ -18,20 +18,61 @@ /*PAGE * - * 13.6.1 Mutex Initialization Scheduling Attributes, P1003.1c/Draft 10, p. 128 + * 13.6.2 Change the Priority Ceiling of a Mutex, P1003.1c/Draft 10, p. 131 */ - -int pthread_mutexattr_setprioceiling( - pthread_mutexattr_t *attr, - int prioceiling + +int pthread_mutex_setprioceiling( + pthread_mutex_t *mutex, + int prioceiling, + int *old_ceiling ) { - if ( !attr || !attr->is_initialized ) + register POSIX_Mutex_Control *the_mutex; + Objects_Locations location; + Priority_Control the_priority; + int status; + + if ( !old_ceiling ) return EINVAL; if ( !_POSIX_Priority_Is_valid( prioceiling ) ) return EINVAL; - attr->prio_ceiling = prioceiling; - return 0; + the_priority = _POSIX_Priority_To_core( prioceiling ); + + /* + * Must acquire the mutex before we can change it's ceiling + */ + + status = pthread_mutex_lock( mutex ); + if ( status ) + return status; + + the_mutex = _POSIX_Mutex_Get( mutex, &location ); + switch ( location ) { + case OBJECTS_REMOTE: +#if defined(RTEMS_MULTIPROCESSING) + /* XXX It feels questionable to set the ceiling on a remote mutex. */ + return EINVAL; +#endif + case OBJECTS_ERROR: + return EINVAL; /* impossible to get here */ + case OBJECTS_LOCAL: + *old_ceiling = _POSIX_Priority_From_core( + the_mutex->Mutex.Attributes.priority_ceiling + ); + the_mutex->Mutex.Attributes.priority_ceiling = the_priority; + _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 0; + } + return POSIX_BOTTOM_REACHED(); } |