From 4dc89814e10296b8f7212e949a97730abc9032e4 Mon Sep 17 00:00:00 2001
From: Joel Sherrill <joel.sherrill@OARcorp.com>
Date: Tue, 2 Nov 1999 17:00:35 +0000
Subject: Split mqueue.c into a variety of files.

---
 cpukit/posix/src/mqueuerecvsupp.c | 79 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 cpukit/posix/src/mqueuerecvsupp.c

(limited to 'cpukit/posix/src/mqueuerecvsupp.c')

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();
+}
+
-- 
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