# 2.11BSD#431 - /usr/man/cat3/ualarm.0

    UALARM(3)	    UNIX Programmer's Manual		UALARM(3)

    NAME
         ualarm - schedule signal after specified time

    SYNOPSIS
         unsigned ualarm(value, interval)
         unsigned value;
         unsigned interval;

    DESCRIPTION
         This is a simplified interface to setitimer(2).

         Ualarm causes signal SIGALRM, see signal(3C), to be sent to
         the invoking process in a number of microseconds given by
         the value argument.  Unless caught or ignored, the signal
         terminates the process.

         If the interval argument is non-zero, the SIGALRM signal
         will be sent to the process every interval microseconds
         after the timer expires (e.g. after value microseconds have
         passed).

         Because of scheduling delays, resumption of execution of
         when the signal is caught may be delayed an arbitrary
         amount.  The longest specifiable delay time (on the vax) is
         2147483647 microseconds.

         The return value is the amount of time previously remaining
         in the alarm clock.

    SEE ALSO
         getitimer(2), setitimer(2), sigpause(2), sigvec(2),
         signal(3C), sleep(3), alarm(3), usleep(3)

    NOTES  (PDP-11)
         On the PDP-11, setitimer(2) rounds the number of
         microseconds up to seconds resolution, therefore ualarm
         doesn't give you any more resolution than alarm(3).

    Printed 11/26/99	 August 26, 1988			1

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