Directive rtems_task_variable_get() added by Eric Norum.

1 files changed, 72 insertions, 0 deletions

diff --git a/cpukit/rtems/src/taskvariableget.c b/cpukit/rtems/src/taskvariableget.c
new file mode 100644
index 0000000000..9beb0c4045
--- /dev/null
+++ b/cpukit/rtems/src/taskvariableget.c
@@ -0,0 +1,72 @@
+/*
+ *  rtems_task_variable_get - Get a per-task variable
+ *
+ *
+ *  COPYRIGHT (c) 1989-1999.
+ *  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.OARcorp.com/rtems/license.html.
+ *
+ *  $Id$
+ */
+
+#include <rtems/system.h>
+#include <rtems/rtems/tasks.h>
+#include <rtems/score/wkspace.h>
+
+/*
+ *  rtems_task_variable_get
+ *
+ *  This directive gets the value of a task variable. 
+ */
+
+rtems_status_code rtems_task_variable_get(
+  rtems_id tid,
+  void **ptr,
+  void **result
+)
+{
+  Thread_Control        *the_thread;
+  Objects_Locations      location;
+  rtems_task_variable_t *tvp;
+
+  the_thread = _Thread_Get (tid, &location);
+  switch (location) {
+  case OBJECTS_REMOTE:
+#if defined(RTEMS_MULTIPROCESSING)
+    _Thread_Dispatch();
+    return RTEMS_ILLEGAL_ON_REMOTE_OBJECT;
+#endif
+
+  case OBJECTS_ERROR:
+    return RTEMS_INVALID_ID;
+
+  default:
+    return RTEMS_INTERNAL_ERROR;
+
+  case OBJECTS_LOCAL:
+
+    /*
+     *  Figure out if the variable is in this task's list.
+     */
+
+    tvp = the_thread->task_variables;
+    while (tvp) {
+      if (tvp->ptr == ptr) {
+	/*
+	 * Should this return the current (i.e not the
+	 * saved) value if `tid' is the current task?
+	 */
+        *result = tvp->var;
+        _Thread_Enable_dispatch();
+        return RTEMS_SUCCESSFUL;
+      }
+      tvp = tvp->next;
+    }
+    _Thread_Enable_dispatch();
+    return RTEMS_INVALID_ADDRESS;
+  }
+  return RTEMS_INTERNAL_ERROR;   /* unreached - only to remove warnings */
+}