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/*
* NOTE: The structure of the routines is identical to that of POSIX
* Message_queues to leave the option of having unnamed message
* queues at a future date. They are currently not part of the
* POSIX standard but unnamed message_queues are. This is also
* the reason for the apparently unnecessary tracking of
* the process_shared attribute. [In addition to the fact that
* it would be trivial to add pshared to the mq_attr structure
* and have process private message queues.]
*
* This code ignores the O_RDONLY/O_WRONLY/O_RDWR flag at open
* time.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdarg.h>
#include <pthread.h>
#include <limits.h>
#include <errno.h>
#include <fcntl.h>
#include <mqueue.h>
#include <rtems/system.h>
#include <rtems/score/watchdog.h>
#include <rtems/seterr.h>
#include <rtems/posix/mqueue.h>
#include <rtems/posix/time.h>
/*PAGE
*
* _POSIX_Message_queue_Send_support
*/
int _POSIX_Message_queue_Send_support(
mqd_t mqdes,
const char *msg_ptr,
size_t msg_len,
uint32_t msg_prio,
boolean 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;
boolean do_wait;
/*
* 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_ERROR:
rtems_set_errno_and_return_minus_one( EBADF );
case OBJECTS_REMOTE:
_Thread_Dispatch();
return POSIX_MP_NOT_IMPLEMENTED();
rtems_set_errno_and_return_minus_one( EINVAL );
case OBJECTS_LOCAL:
if ( (the_mq_fd->oflag & O_ACCMODE) == O_RDONLY ) {
_Thread_Enable_dispatch();
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
*/
msg_status = _CORE_message_queue_Submit(
&the_mq->Message_queue,
(void *) msg_ptr,
msg_len,
mqdes, /* mqd_t is an object id */
#if defined(RTEMS_MULTIPROCESSING)
NULL, /* XXX _POSIX_Message_queue_Core_message_queue_mp_support*/
#else
NULL,
#endif
_POSIX_Message_queue_Priority_to_core( msg_prio ),
do_wait,
timeout /* no timeout */
);
_Thread_Enable_dispatch();
/*
* 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 = _Thread_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
)
);
}
return POSIX_BOTTOM_REACHED();
}
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