usleep(3C)							    usleep(3C)

NAME    [Toc]    [Back]

     usleep - suspend execution	for an interval

SYNOPSIS    [Toc]    [Back]

     #include <unistd.h>

     int usleep	(useconds_t seconds);

DESCRIPTION    [Toc]    [Back]

     The usleep() function suspends the	current	thread from execution for the
     number of microseconds specified by the seconds argument.	Because	of
     other activity, or	because	of the time spent in processing	the call, the
     actual suspension time may	be longer than the amount of time specified.

     The seconds argument must be less than 1,000,000.	If the value of
     seconds is	0, the call has	no effect.

     The usleep() function uses	the high resolution sleep function:
     nanosleep() to suspend execution of a thread.

DIAGNOSTICS    [Toc]    [Back]

     Upon successful completion, a 0 value is returned.	 Otherwise, -1 is
     returned and errno	is set to indicate the error.  If the time interval
     specified is 1,000,000 or more microseconds, errno	is set to EINVAL and
     -1	is returned from usleep().

SEE ALSO    [Toc]    [Back]

     nanosleep(2).


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