+ Timer() :
+ mMode(INVALID) {}
+
+ Timer(const Function& function, Scalar seconds, Mode mode = NORMAL)
+ {
+ init(function, seconds, mode);
+ }
+
+ ~Timer()
+ {
+ invalidate();
+ }
+
+ void init(const Function& function, Scalar seconds, Mode mode = NORMAL);
+
+ bool isValid() const;
+ void invalidate();
+
+ void fire();
+
+ Scalar getSecondsRemaining() const;
+ bool isExpired() const;
+ bool isRepeating() const;
+
+
+ /**
+ * Get the number of seconds since a fixed, arbitrary point in the past.
+ * @return Seconds.
+ */
+
+ static Scalar getTicks();
+
+
+ /**
+ * Put the thread to sleep for a certain period of time. If absolute is true,
+ * then it will sleep until seconds after the fixed time in the past. If
+ * absolute is false, it will sleep for seconds starting now. Unlike system
+ * sleep functions, this one automatically resumes sleep if sleep was
+ * interrupted by a signal. Therefore, calling this function is guaranteed to
+ * sleep for the requested amount of time (and maybe longer).
+ */
+
+ static void sleep(Scalar seconds, Mode mode = NORMAL);
+
+
+ static Scalar getNextFire()
+ {
+ return gNextFire;
+ }
+
+ static void fireIfExpired();
+ static void fireIfExpired(Scalar t);
+
+private:
+
+ static unsigned getNewID();
+ static Scalar findNextFire();
+
+ Function mFunction;
+ Mode mMode;
+ Scalar mAbsolute;
+ Scalar mInterval;
+ unsigned mId;
+
+ static Scalar gNextFire;
+ static std::map<unsigned,Timer*> gTimers;
+};