macros.h (2951B)
1 #ifndef LTK_MACROS_H 2 #define LTK_MACROS_H 3 4 /* ltk_timespecadd and ltk_timespecsub are taken from OpenBSD. 5 The copyright is as follows: */ 6 7 /* 8 * Copyright (c) 1982, 1986, 1993 9 * The Regents of the University of California. All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)time.h 8.2 (Berkeley) 7/10/94 36 */ 37 38 /* Note: some code calls these macros with the same first and last 39 argument, so it is important that that doesn't cause bad behavior. */ 40 #define ltk_timespecadd(tsp, usp, vsp) \ 41 do { \ 42 (vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec; \ 43 (vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec; \ 44 if ((vsp)->tv_nsec >= 1000000000L) { \ 45 (vsp)->tv_sec++; \ 46 (vsp)->tv_nsec -= 1000000000L; \ 47 } \ 48 } while (0) 49 50 #define ltk_timespecsub(tsp, usp, vsp) \ 51 do { \ 52 (vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec; \ 53 (vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec; \ 54 if ((vsp)->tv_nsec < 0) { \ 55 (vsp)->tv_sec--; \ 56 (vsp)->tv_nsec += 1000000000L; \ 57 } \ 58 } while (0) 59 60 #endif /* LTK_MACROS_H */