1 files changed, 116 insertions, 0 deletions
diff --git a/cpukit/rtems/src/eventsurrender.c b/cpukit/rtems/src/eventsurrender.c
new file mode 100644
index 0000000000..179727f523
--- /dev/null
+++ b/cpukit/rtems/src/eventsurrender.c
@@ -0,0 +1,116 @@
+/*
+ *  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_Surrender
+ *
+ *  This routines remove a thread from the specified threadq.
+ *
+ *  Input parameters:
+ *    the_thread - pointer to thread to be dequeued
+ *
+ *  Output parameters: NONE
+ *
+ *  INTERRUPT LATENCY:
+ *    before flash
+ *    after flash
+ *    check sync
+ */
+
+void _Event_Surrender(
+  Thread_Control *the_thread
+)
+{
+  ISR_Level           level;
+  rtems_event_set     pending_events;
+  rtems_event_set     event_condition;
+  rtems_event_set     seized_events;
+  rtems_option        option_set;
+  RTEMS_API_Control  *api;
+
+  api = the_thread->API_Extensions[ THREAD_API_RTEMS ];
+
+  option_set = (rtems_option) the_thread->Wait.option;
+
+  _ISR_Disable( level );
+  pending_events  = api->pending_events;
+  event_condition = (rtems_event_set) the_thread->Wait.count;
+
+  seized_events = _Event_sets_Get( pending_events, event_condition );
+
+  /*
+   *  No events were seized in this operation
+   */
+  if ( _Event_sets_Is_empty( seized_events ) ) {
+    _ISR_Enable( level );
+    return;
+  }
+
+  /*
+   *  If we are in an ISR and sending to the current thread, then
+   *  we have a critical section issue to deal with.
+   */
+  if ( _ISR_Is_in_progress() &&
+       _Thread_Is_executing( the_thread ) &&
+       ((_Event_Sync_state == THREAD_BLOCKING_OPERATION_TIMEOUT) ||
+        (_Event_Sync_state == THREAD_BLOCKING_OPERATION_NOTHING_HAPPENED)) ) {
+    if ( seized_events == event_condition || _Options_Is_any(option_set) ) {
+      api->pending_events = _Event_sets_Clear( pending_events,seized_events );
+      the_thread->Wait.count = 0;
+      *(rtems_event_set *)the_thread->Wait.return_argument = seized_events;
+      _Event_Sync_state = THREAD_BLOCKING_OPERATION_SATISFIED;
+    }
+    _ISR_Enable( level );
+    return;
+  }
+
+  /*
+   *  Otherwise, this is a normal send to another thread
+   */
+  if ( _States_Is_waiting_for_event( the_thread->current_state ) ) {
+    if ( seized_events == event_condition || _Options_Is_any( option_set ) ) {
+      api->pending_events = _Event_sets_Clear( pending_events, seized_events );
+      the_thread->Wait.count = 0;
+      *(rtems_event_set *)the_thread->Wait.return_argument = seized_events;
+
+      _ISR_Flash( level );
+
+      if ( !_Watchdog_Is_active( &the_thread->Timer ) ) {
+        _ISR_Enable( level );
+        _Thread_Unblock( the_thread );
+      } else {
+        _Watchdog_Deactivate( &the_thread->Timer );
+        _ISR_Enable( level );
+        (void) _Watchdog_Remove( &the_thread->Timer );
+        _Thread_Unblock( the_thread );
+      }
+      return;
+    }
+  }
+  _ISR_Enable( level );
+}