Timer Element in Click

[Eddie Kohler]

Hi Shweta,

When you construct a Timer object, you supply a hook to be called when the
timer goes off. The most general constructor is:

	Timer(TimerHook h, void *thunk)

where

	typedef void (*TimerHook)(Timer *, void *);

Then when the 'timer' goes off, the TimerHook 'h' will be called as
follows:

	h(timer, thunk);

The constructors you mention supply their own hooks for convenience.
"Timer(Element *e)" calls 'e->run_scheduled()' when the timer goes off.
"Timer(Task *t)" calls 't->reschedule()' when the timer goes off.

Hope this helps!
Eddie