From d507c0373168e6375b1e876d79730bff8020cb58 Mon Sep 17 00:00:00 2001
From: Joel Sherrill <joel.sherrill@oarcorp.com>
Date: Thu, 3 Apr 2014 12:55:43 -0500
Subject: Disable per task variables when SMP is enabled

Per task variables are inherently unsafe in SMP systems. This
patch disables them from the build and adds warnings in the
appropriate documentation and configuration sections.
---
 cpukit/rtems/include/rtems/rtems/tasks.h | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

(limited to 'cpukit/rtems/include/rtems/rtems/tasks.h')

diff --git a/cpukit/rtems/include/rtems/rtems/tasks.h b/cpukit/rtems/include/rtems/rtems/tasks.h
index 325723ff85..263cc531d9 100644
--- a/cpukit/rtems/include/rtems/rtems/tasks.h
+++ b/cpukit/rtems/include/rtems/rtems/tasks.h
@@ -28,7 +28,7 @@
  */
 
 /*
- * COPYRIGHT (c) 1989-2011.
+ * COPYRIGHT (c) 1989-2014.
  * On-Line Applications Research Corporation (OAR).
  *
  * The license and distribution terms for this file may be
@@ -449,17 +449,18 @@ rtems_status_code rtems_task_wake_after(
  *
  *  This directive returns a status indicating whether or not
  *  the specified task is suspended.
- *
- *  RTEMS Task Manager
  */
 rtems_status_code rtems_task_is_suspended(
   rtems_id   id
 );
 
+#if !defined(RTEMS_SMP)
 /**
  *  @brief RTEMS Add Task Variable
  *
  *  This directive adds a per task variable.
+ *
+ *  @note This service is not available in SMP configurations.
  */
 rtems_status_code rtems_task_variable_add(
   rtems_id  tid,
@@ -470,9 +471,9 @@ rtems_status_code rtems_task_variable_add(
 /**
  *  @brief Get a per-task variable
  *
- *  RTEMS Task Variable Get
- *
  *  This directive gets the value of a task variable.
+ *
+ *  @note This service is not available in SMP configurations.
  */
 rtems_status_code rtems_task_variable_get(
   rtems_id tid,
@@ -484,11 +485,14 @@ rtems_status_code rtems_task_variable_get(
  *  @brief RTEMS Delete Task Variable
  *
  *  This directive removes a per task variable.
+ *
+ *  @note This service is not available in SMP configurations.
  */
 rtems_status_code rtems_task_variable_delete(
   rtems_id  tid,
   void    **ptr
 );
+#endif
 
 #if defined(__RTEMS_HAVE_SYS_CPUSET_H__) && defined(RTEMS_SMP)
 /**
-- 
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