5.1 Timers

struct
(struct timer (tmevtexpire-secondsaction)
#:extra-constructor-namemake-timer )
tm:timer-manager?
evt:evt?
expire-seconds:number?
action:(-> void )

evt is an alarm-evt that is ready at expire-seconds. action should be called when this evt is ready.

procedure
( start-timer-manager )→timer-manager?

Handles the execution and management of timers.

procedure
( start-timer tmsaction)→timer?
tm:timer-manager?
s:number?
action:(-> void )

Registers a timer that runs action after s seconds.

procedure
( reset-timer! ts)→void
t:timer?
s:number?

Changes t so that it will fire after s seconds.

procedure
( increment-timer! ts)→void
t:timer?
s:number?

Changes t so that it will fire after s seconds from when it does now.

procedure
( cancel-timer! t)→void
t:timer?

Cancels the firing of t ever and frees resources used by t.

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