1 /*- 2 * Copyright (c) 2006 Robert N. M. Watson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 /* 28 * Compatibility routines for clock_gettime(CLOCK_REALTIME, ...) for systems 29 * that don't have it. We don't use clockid_t in order to avoid conflicts 30 * with the native OS if it has one but not clock_gettime(). We also assume 31 * that the sys/time.h include has already happened at this point, so we have 32 * access to gettimeofday(). 33 */ 34 #include <errno.h> 35 36 #define CLOCK_REALTIME 0x2d4e1588 37 38 static inline int 39 clock_gettime(int clock_id, struct timespec *ts) 40 { 41 struct timeval tv; 42 43 if (clock_id != CLOCK_REALTIME) { 44 errno = EINVAL; 45 return (-1); 46 } 47 if (gettimeofday(&tv, NULL) < 0) 48 return (-1); 49 ts->tv_sec = tv.tv_sec; 50 ts->tv_nsec = tv.tv_usec * 1000; 51 return (0); 52 } 53