usleep(3)               (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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