usleep.c revision 200150
1236769Sobrien/* 2236769Sobrien * Copyright (c) 1989, 1993 3236769Sobrien * The Regents of the University of California. All rights reserved. 4236769Sobrien * 5236769Sobrien * Redistribution and use in source and binary forms, with or without 6236769Sobrien * modification, are permitted provided that the following conditions 7236769Sobrien * are met: 8236769Sobrien * 1. Redistributions of source code must retain the above copyright 9236769Sobrien * notice, this list of conditions and the following disclaimer. 10236769Sobrien * 2. Redistributions in binary form must reproduce the above copyright 11236769Sobrien * notice, this list of conditions and the following disclaimer in the 12236769Sobrien * documentation and/or other materials provided with the distribution. 13236769Sobrien * 4. Neither the name of the University nor the names of its contributors 14236769Sobrien * may be used to endorse or promote products derived from this software 15236769Sobrien * without specific prior written permission. 16236769Sobrien * 17236769Sobrien * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18236769Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19236769Sobrien * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20236769Sobrien * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21236769Sobrien * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22236769Sobrien * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23236769Sobrien * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24236769Sobrien * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25236769Sobrien * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26236769Sobrien * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27236769Sobrien * SUCH DAMAGE. 28236769Sobrien */ 29236769Sobrien 30236769Sobrien#if defined(LIBC_SCCS) && !defined(lint) 31236769Sobrienstatic char sccsid[] = "@(#)usleep.c 8.1 (Berkeley) 6/4/93"; 32236769Sobrien#endif /* LIBC_SCCS and not lint */ 33236769Sobrien#include <sys/cdefs.h> 34236769Sobrien__FBSDID("$FreeBSD: head/lib/libc/gen/usleep.c 200150 2009-12-05 19:31:38Z ed $"); 35236769Sobrien 36236769Sobrien#include "namespace.h" 37236769Sobrien#include <time.h> 38236769Sobrien#include <unistd.h> 39236769Sobrien#include "un-namespace.h" 40236769Sobrien 41236769Sobrienint 42236769Sobrien__usleep(useconds_t useconds) 43236769Sobrien{ 44236769Sobrien struct timespec time_to_sleep; 45236769Sobrien 46236769Sobrien time_to_sleep.tv_nsec = (useconds % 1000000) * 1000; 47236769Sobrien time_to_sleep.tv_sec = useconds / 1000000; 48236769Sobrien return (_nanosleep(&time_to_sleep, NULL)); 49236769Sobrien} 50236769Sobrien 51236769Sobrien__weak_reference(__usleep, usleep); 52236769Sobrien__weak_reference(__usleep, _usleep); 53236769Sobrien