after
after — a timer that initiates an action after a period of
time.
after (seconds, action...)
secondsA number of seconds, which may be fractional.
actionOne or more statements to be executed. This argument is evaluated, so literal statements must be quoted.
An integer timer number which may be used as the argument to
cancel.
This function specifies an action to be performed after a given period of
time in seconds has elapsed. The number of seconds
may be specified to arbitrary precision, but will be limited in fact by the
timer resolution of the operating system. In most cases this is practically
limited to 20 milliseconds (0.05 seconds).
The timer functions after, every
and at all cause an action to occur at the specified
time, regardless of what is happening at that time, except if the timer
expires during garbage collection. In this case, the timer will be serviced
as soon as the garbage collection finishes.
For Gamma to notice a timer, you must make a call to
next_event.
Gamma>after(30, #princ("Time's up!\n"));1Gamma>next_event();(30 seconds pass) Time's up! nilGamma>
at, every, cancel,
_timers_ in Predefined Symbosl