int mq_notify(
mqd_t mqdes,
const struct sigevent *notification
)
{
POSIX_Message_queue_Control *the_mq;
POSIX_Message_queue_Control_fd *the_mq_fd;
Objects_Locations location;
the_mq_fd = _POSIX_Message_queue_Get_fd( mqdes, &location );
switch ( location ) {
case OBJECTS_LOCAL:
the_mq = the_mq_fd->Queue;
if ( notification ) {
if ( _CORE_message_queue_Is_notify_enabled( &the_mq->Message_queue ) ) {
_Thread_Enable_dispatch();
rtems_set_errno_and_return_minus_one( EBUSY );
}
_CORE_message_queue_Set_notify( &the_mq->Message_queue, NULL, NULL );
the_mq->notification = *notification;
_CORE_message_queue_Set_notify(
&the_mq->Message_queue,
_POSIX_Message_queue_Notify_handler,
the_mq
);
} else {
_CORE_message_queue_Set_notify( &the_mq->Message_queue, NULL, NULL );
}
_Thread_Enable_dispatch();
return 0;
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE:
#endif
case OBJECTS_ERROR:
break;
}
rtems_set_errno_and_return_minus_one( EBADF );
}
int mq_setattr(
mqd_t mqdes,
const struct mq_attr *mqstat,
struct mq_attr *omqstat
)
{
POSIX_Message_queue_Control_fd *the_mq_fd;
CORE_message_queue_Control *the_core_mq;
Objects_Locations location;
if ( !mqstat )
rtems_set_errno_and_return_minus_one( EINVAL );
the_mq_fd = _POSIX_Message_queue_Get_fd( mqdes, &location );
switch ( location ) {
case OBJECTS_LOCAL:
the_core_mq = &the_mq_fd->Queue->Message_queue;
/*
* Return the old values.
*/
if ( omqstat ) {
omqstat->mq_flags = the_mq_fd->oflag;
omqstat->mq_msgsize = the_core_mq->maximum_message_size;
omqstat->mq_maxmsg = the_core_mq->maximum_pending_messages;
omqstat->mq_curmsgs = the_core_mq->number_of_pending_messages;
}
the_mq_fd->oflag = mqstat->mq_flags;
_Thread_Enable_dispatch();
return 0;
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE:
#endif
case OBJECTS_ERROR:
break;
}
rtems_set_errno_and_return_minus_one( EBADF );
}
int mq_close(
mqd_t mqdes
)
{
POSIX_Message_queue_Control *the_mq;
POSIX_Message_queue_Control_fd *the_mq_fd;
Objects_Locations location;
the_mq_fd = _POSIX_Message_queue_Get_fd( mqdes, &location );
if ( location == OBJECTS_LOCAL ) {
/* OBJECTS_LOCAL:
*
* First update the actual message queue to reflect this descriptor
* being disassociated. This may result in the queue being really
* deleted.
*/
the_mq = the_mq_fd->Queue;
the_mq->open_count -= 1;
_POSIX_Message_queue_Delete( the_mq );
/*
* Now close this file descriptor.
*/
_Objects_Close(
&_POSIX_Message_queue_Information_fds, &the_mq_fd->Object );
_POSIX_Message_queue_Free_fd( the_mq_fd );
_Thread_Enable_dispatch();
return 0;
}
/*
* OBJECTS_REMOTE:
* OBJECTS_ERROR:
*/
rtems_set_errno_and_return_minus_one( EBADF );
}
ssize_t _POSIX_Message_queue_Receive_support(
mqd_t mqdes,
char *msg_ptr,
size_t msg_len,
unsigned int *msg_prio,
bool wait,
Watchdog_Interval timeout
)
{
POSIX_Message_queue_Control *the_mq;
POSIX_Message_queue_Control_fd *the_mq_fd;
Objects_Locations location;
size_t length_out;
bool do_wait;
the_mq_fd = _POSIX_Message_queue_Get_fd( mqdes, &location );
switch ( location ) {
case OBJECTS_LOCAL:
if ( (the_mq_fd->oflag & O_ACCMODE) == O_WRONLY ) {
_Thread_Enable_dispatch();
rtems_set_errno_and_return_minus_one( EBADF );
}
the_mq = the_mq_fd->Queue;
if ( msg_len < the_mq->Message_queue.maximum_message_size ) {
_Thread_Enable_dispatch();
rtems_set_errno_and_return_minus_one( EMSGSIZE );
}
/*
* Now if something goes wrong, we return a "length" of -1
* to indicate an error.
*/
length_out = -1;
/*
* A timed receive with a bad time will do a poll regardless.
*/
if ( wait )
do_wait = (the_mq_fd->oflag & O_NONBLOCK) ? false : true;
else
do_wait = wait;
/*
* Now perform the actual message receive
*/
_CORE_message_queue_Seize(
&the_mq->Message_queue,
mqdes,
msg_ptr,
&length_out,
do_wait,
timeout
);
_Thread_Enable_dispatch();
if (msg_prio) {
*msg_prio = _POSIX_Message_queue_Priority_from_core(
_Thread_Executing->Wait.count
);
}
if ( !_Thread_Executing->Wait.return_code )
return length_out;
rtems_set_errno_and_return_minus_one(
_POSIX_Message_queue_Translate_core_message_queue_return_code(
_Thread_Executing->Wait.return_code
)
);
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE:
#endif
case OBJECTS_ERROR:
break;
}
rtems_set_errno_and_return_minus_one( EBADF );
}
int _POSIX_Message_queue_Send_support(
mqd_t mqdes,
const char *msg_ptr,
size_t msg_len,
unsigned int msg_prio,
bool wait,
Watchdog_Interval timeout
)
{
POSIX_Message_queue_Control *the_mq;
POSIX_Message_queue_Control_fd *the_mq_fd;
Objects_Locations location;
CORE_message_queue_Status msg_status;
bool do_wait;
Thread_Control *executing;
/*
* Validate the priority.
* XXX - Do not validate msg_prio is not less than 0.
*/
if ( msg_prio > MQ_PRIO_MAX )
rtems_set_errno_and_return_minus_one( EINVAL );
the_mq_fd = _POSIX_Message_queue_Get_fd( mqdes, &location );
switch ( location ) {
case OBJECTS_LOCAL:
if ( (the_mq_fd->oflag & O_ACCMODE) == O_RDONLY ) {
_Objects_Put( &the_mq_fd->Object );
rtems_set_errno_and_return_minus_one( EBADF );
}
the_mq = the_mq_fd->Queue;
/*
* A timed receive with a bad time will do a poll regardless.
*/
if ( wait )
do_wait = (the_mq_fd->oflag & O_NONBLOCK) ? false : true;
else
do_wait = wait;
/*
* Now perform the actual message receive
*/
executing = _Thread_Executing;
msg_status = _CORE_message_queue_Submit(
&the_mq->Message_queue,
executing,
msg_ptr,
msg_len,
mqdes, /* mqd_t is an object id */
NULL,
_POSIX_Message_queue_Priority_to_core( msg_prio ),
do_wait,
timeout /* no timeout */
);
_Objects_Put( &the_mq_fd->Object );
/*
* If we had to block, then this is where the task returns
* after it wakes up. The returned status is correct for
* non-blocking operations but if we blocked, then we need
* to look at the status in our TCB.
*/
if ( msg_status == CORE_MESSAGE_QUEUE_STATUS_UNSATISFIED_WAIT )
msg_status = executing->Wait.return_code;
if ( !msg_status )
return msg_status;
rtems_set_errno_and_return_minus_one(
_POSIX_Message_queue_Translate_core_message_queue_return_code(
msg_status
)
);
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE:
#endif
case OBJECTS_ERROR:
break;
}
rtems_set_errno_and_return_minus_one( EBADF );
}
