void _CORE_mutex_Seize_interrupt_blocking(
CORE_mutex_Control *the_mutex,
Thread_Control *executing,
Watchdog_Interval timeout,
ISR_lock_Context *lock_context
)
{
#if !defined(RTEMS_SMP)
/*
* We must disable thread dispatching here since we enable the interrupts for
* priority inheritance mutexes.
*/
_Thread_Dispatch_disable();
#endif
if ( _CORE_mutex_Is_inherit_priority( &the_mutex->Attributes ) ) {
Thread_Control *holder = the_mutex->holder;
#if !defined(RTEMS_SMP)
/*
* To enable interrupts here works only since exactly one executing thread
* exists and only threads are allowed to seize and surrender mutexes with
* the priority inheritance protocol. On SMP configurations more than one
* executing thread may exist, so here we must not release the lock, since
* otherwise the current holder may be no longer the holder of the mutex
* once we released the lock.
*/
_Thread_queue_Release( &the_mutex->Wait_queue, lock_context );
#endif
_Thread_Inherit_priority( holder, executing );
#if !defined(RTEMS_SMP)
_Thread_queue_Acquire( &the_mutex->Wait_queue, lock_context );
#endif
}
_Thread_queue_Enqueue_critical(
&the_mutex->Wait_queue.Queue,
the_mutex->operations,
executing,
STATES_WAITING_FOR_MUTEX,
timeout,
CORE_MUTEX_TIMEOUT,
lock_context
);
#if !defined(RTEMS_SMP)
_Thread_Dispatch_enable( _Per_CPU_Get() );
#endif
}
static void _Mutex_Acquire_slow(
Mutex_Control *mutex,
Thread_Control *owner,
Thread_Control *executing,
Watchdog_Interval timeout,
ISR_lock_Context *lock_context
)
{
_Thread_Inherit_priority( owner, executing );
_Thread_queue_Enqueue_critical(
&mutex->Queue.Queue,
MUTEX_TQ_OPERATIONS,
executing,
STATES_WAITING_FOR_SYS_LOCK_MUTEX,
timeout,
ETIMEDOUT,
lock_context
);
}
