rtems: Add system events

System events are similar to normal events.  They offer a second set of
events.  These events are intended for internal RTEMS use and should not
be used by applications (with the exception of the transient system
event).

4 files changed, 136 insertions, 0 deletions

diff --git a/cpukit/rtems/src/event.c b/cpukit/rtems/src/event.c
index ed148e8b37..d5c29f6a3e 100644
--- a/cpukit/rtems/src/event.c
+++ b/cpukit/rtems/src/event.c
@@ -34,6 +34,7 @@
 void _Event_Manager_initialization( void )
 {
   _Event_Sync_state = THREAD_BLOCKING_OPERATION_SYNCHRONIZED;
+  _System_event_Sync_state = THREAD_BLOCKING_OPERATION_SYNCHRONIZED;
 
   /*
    *  Register the MP Process Packet routine.
diff --git a/cpukit/rtems/src/systemeventreceive.c b/cpukit/rtems/src/systemeventreceive.c
new file mode 100644
index 0000000000..43f2bec048
--- /dev/null
+++ b/cpukit/rtems/src/systemeventreceive.c
@@ -0,0 +1,68 @@
+/**
+ * @file
+ *
+ * @ingroup ClassicEventSystem
+ *
+ * @brief rtems_event_system_receive() implementation.
+ */
+
+/*
+ * Copyright (c) 2012 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Obere Lagerstr. 30
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * 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.
+ */
+
+#if HAVE_CONFIG_H
+  #include "config.h"
+#endif
+
+#include <rtems/rtems/event.h>
+#include <rtems/rtems/tasks.h>
+
+rtems_status_code rtems_event_system_receive(
+  rtems_event_set  event_in,
+  rtems_option     option_set,
+  rtems_interval   ticks,
+  rtems_event_set *event_out
+)
+{
+  rtems_status_code sc;
+
+  if ( event_out != NULL ) {
+    Thread_Control    *executing = _Thread_Executing;
+    RTEMS_API_Control *api = executing->API_Extensions[ THREAD_API_RTEMS ];
+    Event_Control     *event = &api->System_event;
+
+    if ( !_Event_sets_Is_empty( event_in ) ) {
+      _Thread_Disable_dispatch();
+      _Event_Seize(
+        event_in,
+        option_set,
+        ticks,
+        event_out,
+        executing,
+        event,
+        &_System_event_Sync_state,
+        STATES_WAITING_FOR_SYSTEM_EVENT
+      );
+      _Thread_Enable_dispatch();
+
+      sc = executing->Wait.return_code;
+    } else {
+      *event_out = event->pending_events;
+      sc = RTEMS_SUCCESSFUL;
+    }
+  } else {
+    sc = RTEMS_INVALID_ADDRESS;
+  }
+
+  return sc;
+}
diff --git a/cpukit/rtems/src/systemeventsend.c b/cpukit/rtems/src/systemeventsend.c
new file mode 100644
index 0000000000..13d31ccf85
--- /dev/null
+++ b/cpukit/rtems/src/systemeventsend.c
@@ -0,0 +1,65 @@
+/**
+ * @file
+ *
+ * @ingroup ClassicEventSystem
+ *
+ * @brief rtems_event_system_send() implementation.
+ */
+
+/*
+ * Copyright (c) 2012 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Obere Lagerstr. 30
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * 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.
+ */
+
+#if HAVE_CONFIG_H
+  #include "config.h"
+#endif
+
+#include <rtems/rtems/event.h>
+#include <rtems/rtems/tasks.h>
+
+rtems_status_code rtems_event_system_send(
+  rtems_id        id,
+  rtems_event_set event_in
+)
+{
+  rtems_status_code  sc;
+  Thread_Control    *thread;
+  Objects_Locations  location;
+  RTEMS_API_Control *api;
+
+  thread = _Thread_Get( id, &location );
+  switch ( location ) {
+    case OBJECTS_LOCAL:
+      api = thread->API_Extensions[ THREAD_API_RTEMS ];
+      _Event_Surrender(
+        thread,
+        event_in,
+        &api->System_event,
+        &_System_event_Sync_state,
+        STATES_WAITING_FOR_SYSTEM_EVENT
+      );
+      _Thread_Enable_dispatch();
+      sc = RTEMS_SUCCESSFUL;
+      break;
+#ifdef RTEMS_MULTIPROCESSING
+    case OBJECTS_REMOTE:
+      sc = RTEMS_ILLEGAL_ON_REMOTE_OBJECT;
+      break;
+#endif
+    default:
+      sc = RTEMS_INVALID_ID;
+      break;
+  }
+
+  return sc;
+}
diff --git a/cpukit/rtems/src/tasks.c b/cpukit/rtems/src/tasks.c
index 325eba0546..c679f1e6f2 100644
--- a/cpukit/rtems/src/tasks.c
+++ b/cpukit/rtems/src/tasks.c
@@ -65,6 +65,7 @@ static bool _RTEMS_tasks_Create_extension(
   created->API_Extensions[ THREAD_API_RTEMS ] = api;
 
   _Event_Initialize( &api->Event );
+  _Event_Initialize( &api->System_event );
   _ASR_Initialize( &api->Signal );
   created->task_variables = NULL;
 
@@ -93,6 +94,7 @@ static void _RTEMS_tasks_Start_extension(
   api = started->API_Extensions[ THREAD_API_RTEMS ];
 
   _Event_Initialize( &api->Event );
+  _Event_Initialize( &api->System_event );
 }
 
 /*