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authorJoel Sherrill <joel.sherrill@OARcorp.com>1999-05-17 21:02:16 +0000
committerJoel Sherrill <joel.sherrill@OARcorp.com>1999-05-17 21:02:16 +0000
commitc4d69e21a751d4c907db9e8f4bb9bd38693075b1 (patch)
treeb12402bce88e14077b0b6926293f7121b0c27822 /cpukit/rtems/src/taskgetnote.c
parentThread Handler split into multiple files. Eventually, as RTEMS is (diff)
downloadrtems-c4d69e21a751d4c907db9e8f4bb9bd38693075b1.tar.bz2
Split Task Manager into multiple files. Eventually this effort will
reduce the size of executables.
Diffstat (limited to 'cpukit/rtems/src/taskgetnote.c')
-rw-r--r--cpukit/rtems/src/taskgetnote.c106
1 files changed, 106 insertions, 0 deletions
diff --git a/cpukit/rtems/src/taskgetnote.c b/cpukit/rtems/src/taskgetnote.c
new file mode 100644
index 0000000000..dafbbaba3b
--- /dev/null
+++ b/cpukit/rtems/src/taskgetnote.c
@@ -0,0 +1,106 @@
+/*
+ * RTEMS Task Manager
+ *
+ *
+ * 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/rtems/status.h>
+#include <rtems/rtems/support.h>
+#include <rtems/rtems/modes.h>
+#include <rtems/score/object.h>
+#include <rtems/score/stack.h>
+#include <rtems/score/states.h>
+#include <rtems/rtems/tasks.h>
+#include <rtems/score/thread.h>
+#include <rtems/score/threadq.h>
+#include <rtems/score/tod.h>
+#include <rtems/score/userext.h>
+#include <rtems/score/wkspace.h>
+#include <rtems/score/apiext.h>
+#include <rtems/score/sysstate.h>
+
+/*PAGE
+ *
+ * rtems_task_get_note
+ *
+ * This directive obtains the note from the specified notepad
+ * of the specified thread.
+ *
+ * Input parameters:
+ * id - thread id
+ * notepad - notepad number
+ * note - pointer to note
+ *
+ * Output parameters:
+ * note - filled in if successful
+ * RTEMS_SUCCESSFUL - if successful
+ * error code - if unsuccessful
+ */
+
+rtems_status_code rtems_task_get_note(
+ Objects_Id id,
+ unsigned32 notepad,
+ unsigned32 *note
+)
+{
+ register Thread_Control *the_thread;
+ Objects_Locations location;
+ RTEMS_API_Control *api;
+
+ /*
+ * NOTE: There is no check for < RTEMS_NOTEPAD_FIRST because that would
+ * be checking an unsigned number for being negative.
+ */
+
+ if ( notepad > RTEMS_NOTEPAD_LAST )
+ return RTEMS_INVALID_NUMBER;
+
+ /*
+ * Optimize the most likely case to avoid the Thread_Dispatch.
+ */
+
+ if ( _Objects_Are_ids_equal( id, OBJECTS_ID_OF_SELF ) ||
+ _Objects_Are_ids_equal( id, _Thread_Executing->Object.id ) ) {
+ api = _Thread_Executing->API_Extensions[ THREAD_API_RTEMS ];
+ *note = api->Notepads[ notepad ];
+ return RTEMS_SUCCESSFUL;
+ }
+
+ the_thread = _Thread_Get( id, &location );
+ switch ( location ) {
+
+ case OBJECTS_REMOTE:
+#if defined(RTEMS_MULTIPROCESSING)
+ _Thread_Executing->Wait.return_argument = note;
+
+ return _RTEMS_tasks_MP_Send_request_packet(
+ RTEMS_TASKS_MP_GET_NOTE_REQUEST,
+ id,
+ 0, /* Not used */
+ notepad,
+ 0 /* Not used */
+ );
+#endif
+
+ case OBJECTS_ERROR:
+ return RTEMS_INVALID_ID;
+
+ case OBJECTS_LOCAL:
+ api = the_thread->API_Extensions[ THREAD_API_RTEMS ];
+ *note = api->Notepads[ notepad ];
+ _Thread_Enable_dispatch();
+ return RTEMS_SUCCESSFUL;
+ }
+
+ return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */
+}