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Annotation of 43BSDReno/lib/libc/gen/ualarm.3, revision 1.1.1.1

1.1       root        1: .\" Copyright (c) 1980 Regents of the University of California.
                      2: .\" All rights reserved.  The Berkeley software License Agreement
                      3: .\" specifies the terms and conditions for redistribution.
                      4: .\"
                      5: .\"    @(#)@(#)ualarm.3        6.4 (Berkeley) 5/13/86
                      6: .\"
                      7: .TH UALARM 3  "May 13, 1986"
                      8: .UC 6
                      9: .SH NAME
                     10: ualarm \- schedule signal after specified time
                     11: .SH SYNOPSIS
                     12: .nf
                     13: .B unsigned ualarm(value, interval)
                     14: .B unsigned value;
                     15: .B unsigned interval;
                     16: .fi
                     17: .SH DESCRIPTION
                     18: .ft B
                     19: This is a simplified interface to setitimer(2).
                     20: .ft R
                     21: .PP
                     22: .I Ualarm
                     23: causes signal SIGALRM, see
                     24: .IR signal (3C),
                     25: to be sent to the invoking process
                     26: in a number of microseconds given by the
                     27: .I value
                     28: argument.
                     29: Unless caught or ignored, the signal terminates the process.
                     30: .PP
                     31: If the
                     32: .I interval
                     33: argument is non-zero, the SIGALRM signal will be sent
                     34: to the process every
                     35: .I interval
                     36: microseconds after the timer expires (e.g. after
                     37: .I value
                     38: microseconds have passed).
                     39: .PP
                     40: Because of scheduling delays,
                     41: resumption of execution of when the signal is
                     42: caught may be delayed an arbitrary amount.
                     43: The longest specifiable delay time (on the vax) is 2147483647 microseconds.
                     44: .PP
                     45: The return value is the amount of time previously remaining in the alarm clock.
                     46: .SH "SEE ALSO"
                     47: getitimer(2), setitimer(2), sigpause(2), sigvec(2), signal(3C), sleep(3),
                     48: alarm(3), usleep(3)

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