nanosleep(3C)						   Standard C Library Functions 					     nanosleep(3C)

NAME

       nanosleep - high resolution sleep

SYNOPSIS

       #include <time.h>

       int nanosleep(const struct timespec *rqtp,
	    struct timespec *rmtp);

DESCRIPTION

       The  nanosleep()  function  causes  the current thread  to be suspended from execution until either the time interval specified by the rqtp
       argument has elapsed or a signal is delivered to the calling thread and its action is to invoke a signal-catching function or to  terminate
       the  process. The suspension time may be longer than requested because the argument value is rounded up to an integer multiple of the sleep
       resolution or because of the scheduling of other activity by the system. But, except for the case of being interrupted  by  a  signal,  the
       suspension time will not be less than the time specified by rqtp, as measured by the system clock, CLOCK_REALTIME.

       The use of the nanosleep() function has no effect on the action or blockage of any signal.

RETURN VALUES

       If the nanosleep() function returns because the requested time has elapsed, its return value is 0.

       If the nanosleep() function returns because it has been interrupted by a signal, the function returns a value of -1 and sets errno to indi-
       cate the interruption. If the rmtp argument is non-NULL, the timespec structure referenced by it is updated to contain the amount  of  time
       remaining  in  the  interval  (the  requested  time minus the time actually slept). If the rmtp argument is NULL, the remaining time is not
       returned.

       If nanosleep() fails, it returns -1 and sets errno to indicate the error.

ERRORS

       The nanosleep() function will fail if:

       EINTR	 The nanosleep() function was interrupted by a signal.

       EINVAL	 The rqtp argument specified a nanosecond value less than zero or greater than or equal to 1000 million.

       ENOSYS	 The nanosleep() function is not supported by this implementation.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |ATTRIBUTE TYPE		     |ATTRIBUTE VALUE		   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+
       |Standard		     |See standards(5). 	   |
       +-----------------------------+-----------------------------+

SEE ALSO

       sleep(3C), time.h(3HEAD), attributes(5), standards(5)

SunOS 5.11							    5 Feb 2008							     nanosleep(3C)