1 files changed, 93 insertions, 0 deletions
diff --git a/cpukit/rtems/src/eventtimeout.c b/cpukit/rtems/src/eventtimeout.c
new file mode 100644
index 0000000000..c1eef71f9e
--- /dev/null
+++ b/cpukit/rtems/src/eventtimeout.c
@@ -0,0 +1,93 @@
+/*
+ *  Event Manager
+ *
+ *  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 <rtems/system.h>
+#include <rtems/rtems/status.h>
+#include <rtems/rtems/event.h>
+#include <rtems/score/isr.h>
+#include <rtems/score/object.h>
+#include <rtems/rtems/options.h>
+#include <rtems/score/states.h>
+#include <rtems/score/thread.h>
+#include <rtems/rtems/tasks.h>
+
+/*PAGE
+ *
+ *  _Event_Timeout
+ *
+ *  This routine processes a thread which timeouts while waiting to
+ *  receive an event_set. It is called by the watchdog handler.
+ *
+ *  Input parameters:
+ *    id - thread id
+ *
+ *  Output parameters: NONE
+ */
+
+void _Event_Timeout(
+  Objects_Id  id,
+  void       *ignored
+)
+{
+  Thread_Control    *the_thread;
+  Objects_Locations  location;
+  ISR_Level          level;
+
+  the_thread = _Thread_Get( id, &location );
+  switch ( location ) {
+
+    case OBJECTS_LOCAL:
+
+      /*
+       *  If the event manager is not synchronized, then it is either
+       *  "nothing happened", "timeout", or "satisfied".   If the_thread
+       *  is the executing thread, then it is in the process of blocking
+       *  and it is the thread which is responsible for the synchronization
+       *  process.
+       *
+       *  If it is not satisfied, then it is "nothing happened" and
+       *  this is the "timeout" transition.  After a request is satisfied,
+       *  a timeout is not allowed to occur.
+       */
+      _ISR_Disable( level );
+        #if defined(RTEMS_DEBUG)
+          if ( !the_thread->Wait.count ) {  /* verify thread is waiting */
+            _Thread_Unnest_dispatch();
+            _ISR_Enable( level );
+            return;
+          }
+        #endif
+
+        the_thread->Wait.count = 0;
+        if ( _Thread_Is_executing( the_thread ) ) {
+          if ( _Event_Sync_state == THREAD_BLOCKING_OPERATION_NOTHING_HAPPENED )
+            _Event_Sync_state = THREAD_BLOCKING_OPERATION_TIMEOUT;
+        }
+
+        the_thread->Wait.return_code = RTEMS_TIMEOUT;
+      _ISR_Enable( level );
+      _Thread_Unblock( the_thread );
+      _Thread_Unnest_dispatch();
+      break;
+
+#if defined(RTEMS_MULTIPROCESSING)
+    case OBJECTS_REMOTE:  /* impossible */
+#endif
+    case OBJECTS_ERROR:
+      break;
+  }
+}