Added chThdGetIdleX() API.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7365 35acf78f-673a-0410-8e92-d51de3d6d3f4

os/rt/include/chthreads.h

@@ -277,6 +277,25 @@ static inline thread_t *chThdGetSelfX(void) {
   return ch.rlist.r_current;
 }
 
+#if !CH_CFG_NO_IDLE_THREAD || defined(__DOXYGEN__)
+/**
+ * @brief   Returns a pointer to the idle thread.
+ * @pre     In order to use this function the option @p CH_CFG_NO_IDLE_THREAD
+ *          must be disabled.
+ * @note    The reference counter of the idle thread is not incremented but
+ *          it is not strictly required being the idle thread a static
+ *          object.
+ *
+ * @return              Pointer to the idle thread.
+ *
+ * @xclass
+ */
+static inline thread_t *chThdGetIdleX(void) {
+
+  return ch.rlist.r_queue.p_prev;
+}
+#endif /* !CH_CFG_NO_IDLE_THREAD */
+
 /**
  * @brief   Returns the current thread priority.
  * @note    Can be invoked in any context.