1 /*- 2 * Copyright (c) 2016 Maksym Sobolyev <sobomax@FreeBSD.org> 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 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/time.h> 31 #include <time.h> 32 33 #include "uc_check_time.h" 34 35 static const struct timeval max_diff_tv = {.tv_sec = 1, .tv_usec = 0}; 36 static const struct timespec max_diff_ts = {.tv_sec = 1, .tv_nsec = 0}; 37 38 #define timespeccmp(tvp, uvp, cmp) \ 39 (((tvp)->tv_sec == (uvp)->tv_sec) ? \ 40 ((tvp)->tv_nsec cmp (uvp)->tv_nsec) : \ 41 ((tvp)->tv_sec cmp (uvp)->tv_sec)) 42 #define timespecsub(vvp, uvp) \ 43 do { \ 44 (vvp)->tv_sec -= (uvp)->tv_sec; \ 45 (vvp)->tv_nsec -= (uvp)->tv_nsec; \ 46 if ((vvp)->tv_nsec < 0) { \ 47 (vvp)->tv_sec--; \ 48 (vvp)->tv_nsec += 1000000000; \ 49 } \ 50 } while (0) 51 52 int 53 uc_check_bintime(const struct bintime *mt) 54 { 55 struct timespec bt; 56 57 bintime2timespec(mt, &bt); 58 return (uc_check_timespec_real(&bt)); 59 } 60 61 int 62 uc_check_timeval(const struct timeval *bt) 63 { 64 struct timeval ct, dt; 65 66 if (gettimeofday(&ct, NULL) < 0) 67 return (-1); 68 timersub(&ct, bt, &dt); 69 if (!timercmp(&dt, &max_diff_tv, <)) 70 return (-1); 71 72 return (0); 73 } 74 75 int 76 uc_check_timespec_real(const struct timespec *bt) 77 { 78 struct timespec ct; 79 80 if (clock_gettime(CLOCK_REALTIME, &ct) < 0) 81 return (-1); 82 timespecsub(&ct, bt); 83 if (!timespeccmp(&ct, &max_diff_ts, <)) 84 return (-1); 85 86 return (0); 87 } 88 89 int 90 uc_check_timespec_mono(const struct timespec *bt) 91 { 92 struct timespec ct; 93 94 if (clock_gettime(CLOCK_MONOTONIC, &ct) < 0) 95 return (-1); 96 timespecsub(&ct, bt); 97 if (!timespeccmp(&ct, &max_diff_ts, <)) 98 return (-1); 99 100 return (0); 101 } 102