int _POSIX_Mutex_Lock_support(
pthread_mutex_t *mutex,
bool blocking,
Watchdog_Interval timeout
)
{
register POSIX_Mutex_Control *the_mutex;
Objects_Locations location;
ISR_Level level;
the_mutex = _POSIX_Mutex_Get_interrupt_disable( mutex, &location, &level );
switch ( location ) {
case OBJECTS_LOCAL:
_CORE_mutex_Seize(
&the_mutex->Mutex,
the_mutex->Object.id,
blocking,
timeout,
level
);
return _POSIX_Mutex_Translate_core_mutex_return_code(
(CORE_mutex_Status) _Thread_Executing->Wait.return_code
);
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE:
#endif
case OBJECTS_ERROR:
break;
}
return EINVAL;
}
int pthread_mutex_unlock(
pthread_mutex_t *mutex
)
{
register POSIX_Mutex_Control *the_mutex;
Objects_Locations location;
CORE_mutex_Status status;
ISR_lock_Context lock_context;
the_mutex = _POSIX_Mutex_Get_interrupt_disable(
mutex,
&location,
&lock_context
);
switch ( location ) {
case OBJECTS_LOCAL:
status = _CORE_mutex_Surrender(
&the_mutex->Mutex,
the_mutex->Object.id,
NULL,
&lock_context
);
return _POSIX_Mutex_Translate_core_mutex_return_code( status );
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE:
#endif
case OBJECTS_ERROR:
break;
}
return EINVAL;
}
int pthread_mutex_setprioceiling(
pthread_mutex_t *mutex,
int prioceiling,
int *old_ceiling
)
{
register POSIX_Mutex_Control *the_mutex;
Priority_Control the_priority;
ISR_lock_Context lock_context;
if ( !old_ceiling )
return EINVAL;
if ( !_POSIX_Priority_Is_valid( prioceiling ) )
return EINVAL;
the_priority = _POSIX_Priority_To_core( prioceiling );
/*
* Must acquire the mutex before we can change it's ceiling.
* POSIX says block until we acquire it.
*/
(void) pthread_mutex_lock( mutex );
/*
* Do not worry about the return code from this. The Get operation
* will also fail if it is a bad id or was deleted between the two
* operations.
*
* NOTE: This makes it easier to get 100% binary coverage since the
* bad Id case is handled by the switch.
*/
the_mutex = _POSIX_Mutex_Get_interrupt_disable( mutex, &lock_context );
if ( the_mutex == NULL ) {
return EINVAL;
}
*old_ceiling = _POSIX_Priority_From_core(
the_mutex->Mutex.Attributes.priority_ceiling
);
the_mutex->Mutex.Attributes.priority_ceiling = the_priority;
/*
* We are required to unlock the mutex before we return.
*/
_CORE_mutex_Surrender(
&the_mutex->Mutex,
NULL,
0,
&lock_context
);
return 0;
}
int pthread_mutex_setprioceiling(
pthread_mutex_t *mutex,
int prioceiling,
int *old_ceiling
)
{
register POSIX_Mutex_Control *the_mutex;
Objects_Locations location;
Priority_Control the_priority;
ISR_lock_Context lock_context;
if ( !old_ceiling )
return EINVAL;
if ( !_POSIX_Priority_Is_valid( prioceiling ) )
return EINVAL;
the_priority = _POSIX_Priority_To_core( prioceiling );
/*
* Must acquire the mutex before we can change it's ceiling.
* POSIX says block until we acquire it.
*/
(void) pthread_mutex_lock( mutex );
/*
* Do not worry about the return code from this. The Get operation
* will also fail if it is a bad id or was deleted between the two
* operations.
*
* NOTE: This makes it easier to get 100% binary coverage since the
* bad Id case is handled by the switch.
*/
the_mutex = _POSIX_Mutex_Get_interrupt_disable(
mutex,
&location,
&lock_context
);
switch ( location ) {
case OBJECTS_LOCAL:
*old_ceiling = _POSIX_Priority_From_core(
the_mutex->Mutex.Attributes.priority_ceiling
);
the_mutex->Mutex.Attributes.priority_ceiling = the_priority;
/*
* We are required to unlock the mutex before we return.
*/
_CORE_mutex_Surrender(
&the_mutex->Mutex,
the_mutex->Object.id,
NULL,
&lock_context
);
return 0;
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE: /* impossible to get here */
#endif
case OBJECTS_ERROR:
break;
}
return EINVAL;
}
