@@ -34,10 +34,11 @@
 	uint8_t arguments;
 	BOOL repeats;
 #ifdef OF_HAVE_BLOCKS
 	of_timer_block_t block;
 #endif
+	BOOL isValid;
 }
 
 /**
  * \brief Creates and schedules a new timer with the specified time interval.
  *
@@ -260,6 +261,27 @@
  * \brief Returns the next date at which the timer will fire.
  *
  * \return The next date at which the timer will fire
  */
 - (OFDate*)fireDate;
+
+/**
+ * \brief Invalidates the timer, preventing it from firing.
+ */
+- (void)invalidate;
+
+/**
+ * \brief Returns whether the timer is valid.
+ *
+ * \return Whether the timer is valid
+ */
+- (BOOL)isValid;
+
+/**
+ * \brief Returns the time interval in which the timer will repeat, if it is a
+ *	  repeating timer.
+ *
+ * \return The time interval in which the timer will repeat, if it is a
+ *	   repeating timer
+ */
+- (double)timeInterval;
 @end