usleep(3)          UNIX System V(BSD Compatibility Package)           usleep(3)


NAME
      usleep - suspend execution for interval in microseconds

SYNOPSIS
      cc [ flag. . . ] file . . .  -lucb

      usleep(useconds)
      unsigned useconds;

DESCRIPTION
      Suspend the current process for the number of microseconds specified by
      the argument.  The actual suspension time may be an arbitrary amount
      longer because of other activity in the system, or because of the time
      spent in processing the call.

      The routine is implemented by setting an interval timer and pausing until
      it occurs.  The previous state of this timer is saved and restored.  If
      the sleep time exceeds the time to the expiration of the previous timer,
      the process sleeps only until the signal would have occurred, and the
      signal is sent a short time later.

      This routine is implemented using setitimer [see getitimer(2)]; it
      requires eight system calls each time it is invoked.

SEE ALSO
      sigpause(3), sleep(3), ualarm(3)

      getitimer(3), alarm(2) in the Programmer's Reference Manual


























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