From 82cb78d84c7962d2b55e1f83c9f8cbcbef386d87 Mon Sep 17 00:00:00 2001
From: Joel Sherrill <joel.sherrill@OARcorp.com>
Date: Tue, 2 Nov 1999 21:45:15 +0000
Subject: Split core message queue and watchdog handler objects into separate
 files.

---
 cpukit/score/src/coremsgseize.c | 101 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 cpukit/score/src/coremsgseize.c

(limited to 'cpukit/score/src/coremsgseize.c')

diff --git a/cpukit/score/src/coremsgseize.c b/cpukit/score/src/coremsgseize.c
new file mode 100644
index 0000000000..cbeb6778a7
--- /dev/null
+++ b/cpukit/score/src/coremsgseize.c
@@ -0,0 +1,101 @@
+/*
+ *  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) 1989-1998.
+ *  On-Line Applications Research Corporation (OAR).
+ *  Copyright assigned to U.S. Government, 1994.
+ *
+ *  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_Seize
+ *
+ *  This kernel routine dequeues a message, copies the message buffer to
+ *  a given destination buffer, and frees the message buffer to the
+ *  inactive message pool.  The thread will be blocked if wait is TRUE,
+ *  otherwise an error will be given to the thread if no messages are available.
+ *
+ *  Input parameters:
+ *    the_message_queue - pointer to message queue
+ *    id                - id of object we are waitig on
+ *    buffer            - pointer to message buffer to be filled
+ *    size              - pointer to the size of buffer to be filled
+ *    wait              - TRUE if wait is allowed, FALSE otherwise
+ *    timeout           - time to wait for a message
+ *
+ *  Output parameters:  NONE
+ *
+ *  NOTE: Dependent on BUFFER_LENGTH
+ *
+ *  INTERRUPT LATENCY:
+ *    available
+ *    wait
+ */
+
+void _CORE_message_queue_Seize(
+  CORE_message_queue_Control *the_message_queue,
+  Objects_Id                  id,
+  void                       *buffer,
+  unsigned32                 *size,
+  boolean                     wait,
+  Watchdog_Interval           timeout
+)
+{
+  ISR_Level                          level;
+  CORE_message_queue_Buffer_control *the_message;
+  Thread_Control                    *executing;
+
+  executing = _Thread_Executing;
+  executing->Wait.return_code = CORE_MESSAGE_QUEUE_STATUS_SUCCESSFUL;
+  _ISR_Disable( level );
+  if ( the_message_queue->number_of_pending_messages != 0 ) {
+    the_message_queue->number_of_pending_messages -= 1;
+
+    the_message = _CORE_message_queue_Get_pending_message( the_message_queue );
+    _ISR_Enable( level );
+    *size = the_message->Contents.size;
+    _CORE_message_queue_Copy_buffer(the_message->Contents.buffer,buffer,*size );
+    _CORE_message_queue_Free_message_buffer(the_message_queue, the_message );
+    return;
+  }
+
+  if ( !wait ) {
+    _ISR_Enable( level );
+    executing->Wait.return_code = CORE_MESSAGE_QUEUE_STATUS_UNSATISFIED_NOWAIT;
+    return;
+  }
+
+  _Thread_queue_Enter_critical_section( &the_message_queue->Wait_queue );
+  executing->Wait.queue              = &the_message_queue->Wait_queue;
+  executing->Wait.id                 = id;
+  executing->Wait.return_argument    = (void *)buffer;
+  executing->Wait.return_argument_1  = (void *)size;
+  _ISR_Enable( level );
+
+  _Thread_queue_Enqueue( &the_message_queue->Wait_queue, timeout );
+}
+
-- 
cgit v1.2.3