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10.1 C++ abstract base class TimerHandler

The abstract base class TimerHandler contains the following public member functions:

$\begin{tabularx}{\linewidth}{rX} \fcn[double delay]{void sched} & schedule a ti... ...tus (either TIMER\_IDLE, TIMER\_PENDING, or TIMER\_HANDLING) \\ \end{tabularx}$

The abstract base class TimerHandler contains the following protected members:

$\begin{tabularx}{\linewidth}{rlX} \fcn[Event* e]{virtual void expire} & {\tt =0}... ...vent event\\ _} & & event to be consumed upon timer expiration\\ \end{tabularx}$

The pure virtual functions must be defined by the timer classes deriving from this abstract base class.

Finally, two private inline functions are defined:

        inline void _sched(double delay) {
            (void)Scheduler::instance().schedule(this, &event_, delay);
        }
        inline void _cancel() {
            (void)Scheduler::instance().cancel(&event_);
        }

From this code we can see that timers make use of methods of the Scheduler class.

2000-08-24