1 files changed, 85 insertions, 0 deletions
diff --git a/cpukit/posix/src/mqueueclose.c b/cpukit/posix/src/mqueueclose.c
new file mode 100644
index 0000000000..35b4dc3ec1
--- /dev/null
+++ b/cpukit/posix/src/mqueueclose.c
@@ -0,0 +1,85 @@
+/*
+ *  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.
+ *
+ *  COPYRIGHT (c) 1989-2008.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#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>
+
+/*
+ *
+ *  15.2.2 Close a Message Queue, P1003.1b-1993, p. 275
+ */
+
+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 );
+}