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author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1999-11-02 17:00:35 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1999-11-02 17:00:35 +0000 |
commit | 4dc89814e10296b8f7212e949a97730abc9032e4 (patch) | |
tree | 1dad373c2e98f6b3127adfd48c7165ab248fbe55 /cpukit/posix/src/mqueuerecvsupp.c | |
parent | Minor changes to make the screen match a bit better. (diff) | |
download | rtems-4dc89814e10296b8f7212e949a97730abc9032e4.tar.bz2 |
Split mqueue.c into a variety of files.
Diffstat (limited to 'cpukit/posix/src/mqueuerecvsupp.c')
-rw-r--r-- | cpukit/posix/src/mqueuerecvsupp.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/cpukit/posix/src/mqueuerecvsupp.c b/cpukit/posix/src/mqueuerecvsupp.c new file mode 100644 index 0000000000..cf241ed64b --- /dev/null +++ b/cpukit/posix/src/mqueuerecvsupp.c @@ -0,0 +1,79 @@ +/* + * 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. + * + * $Id$ + */ + +#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/posix/seterr.h> +#include <rtems/posix/mqueue.h> +#include <rtems/posix/time.h> + +/*PAGE + * + * _POSIX_Message_queue_Receive_support + */ + +/* XXX be careful ... watch the size going through all the layers ... */ + +ssize_t _POSIX_Message_queue_Receive_support( + mqd_t mqdes, + char *msg_ptr, + size_t msg_len, + unsigned int *msg_prio, + Watchdog_Interval timeout +) +{ + register POSIX_Message_queue_Control *the_mq; + Objects_Locations location; + unsigned32 status = 0; + unsigned32 length_out; + + the_mq = _POSIX_Message_queue_Get( mqdes, &location ); + switch ( location ) { + case OBJECTS_ERROR: + set_errno_and_return_minus_one( EINVAL ); + case OBJECTS_REMOTE: + _Thread_Dispatch(); + return POSIX_MP_NOT_IMPLEMENTED(); + set_errno_and_return_minus_one( EINVAL ); + case OBJECTS_LOCAL: + /* XXX need to define the options argument to this */ + length_out = msg_len; + _CORE_message_queue_Seize( + &the_mq->Message_queue, + mqdes, + msg_ptr, + &length_out, + /* msg_prio, XXXX */ + the_mq->blocking, + timeout + ); + _Thread_Enable_dispatch(); + if ( !status ) + return length_out; + /* XXX --- the return codes gotta be looked at .. fix this */ + return _Thread_Executing->Wait.return_code; + } + return POSIX_BOTTOM_REACHED(); +} + |