void mq_desclose(mqd_t mqdes)
{
FAR struct tcb_s *rtcb = (FAR struct tcb_s *)sched_self();
FAR struct task_group_s *group = rtcb->group;
FAR struct mqueue_inode_s *msgq;
DEBUGASSERT(mqdes && group);
/* Remove the message descriptor from the current task's list of message
* descriptors.
*/
sq_rem((FAR sq_entry_t *)mqdes, &group->tg_msgdesq);
/* Find the message queue associated with the message descriptor */
msgq = mqdes->msgq;
/* Check if the calling task has a notification attached to the message
* queue via this mqdes.
*/
#ifndef CONFIG_DISABLE_SIGNALS
if (msgq->ntmqdes == mqdes) {
msgq->ntpid = INVALID_PROCESS_ID;
msgq->ntsigno = 0;
msgq->ntvalue.sival_int = 0;
msgq->ntmqdes = NULL;
}
#endif
/* Deallocate the message descriptor */
mq_desfree(mqdes);
}
int mq_close(mqd_t mqdes)
{
FAR _TCB *rtcb = (FAR _TCB*)g_readytorun.head;
FAR msgq_t *msgq;
irqstate_t saved_state;
int ret = ERROR;
/* Verify the inputs */
if (mqdes)
{
sched_lock();
/* Remove the message descriptor from the current task's
* list of message descriptors.
*/
sq_rem((FAR sq_entry_t*)mqdes, &rtcb->msgdesq);
/* Find the message queue associated with the message descriptor */
msgq = mqdes->msgq;
/* Check if the calling task has a notification attached to
* the message queue via this mqdes.
*/
#ifndef CONFIG_DISABLE_SIGNALS
if (msgq->ntmqdes == mqdes)
{
msgq->ntpid = INVALID_PROCESS_ID;
msgq->ntsigno = 0;
msgq->ntvalue.sival_int = 0;
msgq->ntmqdes = NULL;
}
#endif
/* Decrement the connection count on the message queue. */
if (msgq->nconnect)
{
msgq->nconnect--;
}
/* If it is no longer connected to any message descriptor and if the
* message queue has already been unlinked, then we can discard the
* message queue.
*/
if (!msgq->nconnect && msgq->unlinked)
{
/* Remove the message queue from the list of all
* message queues
*/
saved_state = irqsave();
(void)sq_rem((FAR sq_entry_t*)msgq, &g_msgqueues);
irqrestore(saved_state);
/* Then deallocate it (and any messages left in it) */
mq_msgqfree(msgq);
}
/* Deallocate the message descriptor */
mq_desfree(mqdes);
sched_unlock();
ret = OK;
}
return ret;
}
