UALARM(3) BSD Library Functions Manual UALARM(3)

NAME
     uuaallaarrmm - schedule signal after specified time

LLIIBBRRAARRYY
     Standard C Library (libc, -lc)

SYNOPSIS
     ##iinncclluuddee <>

     usecondst
     uuaallaarrmm(usecondst microseconds, usecondst interval);

DESCRIPTION
     TThhiiss iiss aa ssiimmpplliiffiieedd iinntteerrffaaccee ttoo setitimer(22)..

     The uuaallaarrmm() function waits a count of microseconds before asserting the
     terminating signal SIGALRM.  System activity or time used in processing
     the call may cause a slight delay.

     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 microseconds number of microseconds have passed).

     Due to setitimer(2) restriction the maximum number of microseconds and
     interval is limited to 100000000000000 (in case this value fits in the
     unsigned integer).

RETURN VALUES
     When the signal has successfully been caught, uuaallaarrmm() returns the amount
     of time left on the clock.

NNOOTTEESS
     A microsecond is 0.000001 seconds.

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

HISTORY     The uuaallaarrmm() function appeared in 4.3BSD.

BSD                             April 19, 1994                             BSD