.\" Copyright (c) 1986, 1991 Regents of the University of California.
.\" %sccs.include.redist.man%
.\" @(#)usleep.3 6.5 (Berkeley) %G%
.Nd suspend execution for interval of microseconds
.Fn usleep "u_int microseconds"
suspends execution of the calling process
System activity or time spent in processing the
call may lengthen the sleep slightly.
If a timer is already running on the process its state is saved.
is more than or equal to the remaining clock time for the saved timer,
the remaining clock time.
The state of the previous timer
This routine is implemented using
it requires eight system calls each time it is invoked.
A similar but less compatible function can be obtained with a single
such a function would not restart after signals, but would not interfere