From d65c376845847ea7a697904b5222c39331bd56ec Mon Sep 17 00:00:00 2001
From: Jennifer Averett <Jennifer.Averett@OARcorp.com>
Date: Thu, 13 Jan 2000 18:32:09 +0000
Subject: + Added and yellow line tested
 _CORE_message_queue_Flush_waiting_threads   and
 _CORE_message_queue_Insert_message for posix message queues. + Yellow line
 tested new source

---
 c/src/exec/score/src/coremsgflushwait.c | 70 +++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 c/src/exec/score/src/coremsgflushwait.c

(limited to 'c/src/exec/score/src/coremsgflushwait.c')

diff --git a/c/src/exec/score/src/coremsgflushwait.c b/c/src/exec/score/src/coremsgflushwait.c
new file mode 100644
index 0000000000..bda8143ffd
--- /dev/null
+++ b/c/src/exec/score/src/coremsgflushwait.c
@@ -0,0 +1,70 @@
+/*
+ *  CORE Message Queue Handler
+ *
+ *  DESCRIPTION:
+ *
+ *  This package is the implementation of the CORE Message Queue Handler.
+ *  This core object provides task synchronization and communication functions
+ *  via messages passed to queue objects.
+ *
+ *  COPYRIGHT (c) 1989-1999.
+ *  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.OARcorp.com/rtems/license.html.
+ *
+ *  $Id$
+ */
+
+#include <rtems/system.h>
+#include <rtems/score/chain.h>
+#include <rtems/score/isr.h>
+#include <rtems/score/object.h>
+#include <rtems/score/coremsg.h>
+#include <rtems/score/states.h>
+#include <rtems/score/thread.h>
+#include <rtems/score/wkspace.h>
+#if defined(RTEMS_MULTIPROCESSING)
+#include <rtems/score/mpci.h>
+#endif
+
+/*PAGE
+ *
+ *  _CORE_message_queue_Flush_waiting_threads
+ *
+ *  This function flushes the message_queue's task wait queue.  The number
+ *  of messages flushed from the queue is returned.
+ *
+ *  Input parameters:
+ *    the_message_queue - the message_queue to be flushed
+ *
+ *  Output parameters:
+ *    returns - the number of messages flushed from the queue
+ */
+ 
+void _CORE_message_queue_Flush_waiting_threads(
+  CORE_message_queue_Control *the_message_queue
+)
+{
+  /* XXX this is not supported for global message queues */
+
+  /*
+   *  IF there are no pending messages,
+   *  THEN threads may be blocked waiting to RECEIVE a message,
+   *  
+   *  IF the pending message queue is full
+   *  THEN threads may be blocked waiting to SEND a message
+   *
+   *  But in either case, we will return "unsatisfied nowait"
+   *  to indicate that the blocking condition was not satisfied
+   *  and that the blocking state was canceled.
+   */
+
+  _Thread_queue_Flush(
+    &the_message_queue->Wait_queue,
+    NULL,
+    CORE_MESSAGE_QUEUE_STATUS_UNSATISFIED_NOWAIT
+  );
+}
+
-- 
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