sortix--sortix/libc/time/nanosleep.c

/*
 * Copyright (c) 2013 Jonas 'Sortie' Termansen.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * time/nanosleep.c
 * Sleep for a duration.
 */

#include <time.h>

int nanosleep(const struct timespec* delay, struct timespec* left)
{
	// NOTE: POSIX specifies that we should nanosleep on CLOCK_REALTIME, but it
	//       makes more sense to sleep on the monotonic system clock. Futhermore
	//       Linux does this as well and users probably won't notice.
	return clock_nanosleep(CLOCK_MONOTONIC, 0, delay, left);
}