Virtual timers new functionality added.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@8363 35acf78f-673a-0410-8e92-d51de3d6d3f4

os/rt/include/chvt.h

@@ -324,6 +324,41 @@ static inline bool chVTIsSystemTimeWithin(systime_t start, systime_t end) {
   return chVTIsTimeWithinX(chVTGetSystemTime(), start, end);
 }
 
+/**
+ * @brief   Returns the time interval until the next timer event.
+ * @note    The return value is not perfectly accurate and can report values
+ *          in excess of @p CH_CFG_ST_TIMEDELTA ticks.
+ * @note    The interval returned by this function is only meaningful if
+ *          more timers are not added to the list until the returned time.
+ *
+ * @param[out] timep    pointer to a variable that will contain the time
+ *                      interval until the next timer elapses. This pointer
+ *                      can be @p NULL if the information is not required.
+ * @return              The time, in ticks, until next time event.
+ * @retval false        if the timers list is empty.
+ * @retbal true         if the timers list contains at least one timer.
+ *
+ * @iclass
+ */
+static inline bool chVTGetTimersStateI(systime_t *timep) {
+
+  chDbgCheckClassI();
+
+  if (&ch.vtlist == (virtual_timers_list_t *)ch.vtlist.vt_next)
+    return false;
+
+  if (timep != NULL) {
+#if CH_CFG_ST_TIMEDELTA == 0
+    *timep = ch.vtlist.vt_next->vt_delta;
+#else
+    *timep = ch.vtlist.vt_lasttime + ch.vtlist.vt_next->vt_delta +
+             CH_CFG_ST_TIMEDELTA - chVTGetSystemTimeX();
+#endif
+  }
+
+  return true;
+}
+
 /**
  * @brief   Returns @p true if the specified timer is armed.
  * @pre     The timer must have been initialized using @p chVTObjectInit()

readme.txt

@@ -73,6 +73,8 @@
 *****************************************************************************
 
 *** 3.1.0 ***
+- RT:  Added new function chVTGetTimersStateI() returning the state of the
+       timers list.
 - HAL: Now STM32 USARTv2 driver initializes the ISR vectors statically on
        initialization. Disabling them was not necessary and added to
        the code size.