1 /* 2 * Copyright (C) 2008 The Android Open Source Project 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 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef _SYS_TIME_H_ 30 #define _SYS_TIME_H_ 31 32 #include <sys/cdefs.h> 33 #include <sys/types.h> 34 #include <linux/time.h> 35 36 /* POSIX says <sys/time.h> gets you most of <sys/select.h> and may get you all of it. */ 37 #include <sys/select.h> 38 39 __BEGIN_DECLS 40 41 extern int gettimeofday(struct timeval *, struct timezone *); 42 extern int settimeofday(const struct timeval *, const struct timezone *); 43 44 extern int getitimer(int, struct itimerval *); 45 extern int setitimer(int, const struct itimerval *, struct itimerval *); 46 47 extern int utimes(const char *, const struct timeval *); 48 49 #define timerclear(a) \ 50 ((a)->tv_sec = (a)->tv_usec = 0) 51 52 #define timerisset(a) \ 53 ((a)->tv_sec != 0 || (a)->tv_usec != 0) 54 55 #define timercmp(a, b, op) \ 56 ((a)->tv_sec == (b)->tv_sec \ 57 ? (a)->tv_usec op (b)->tv_usec \ 58 : (a)->tv_sec op (b)->tv_sec) 59 60 #define timeradd(a, b, res) \ 61 do { \ 62 (res)->tv_sec = (a)->tv_sec + (b)->tv_sec; \ 63 (res)->tv_usec = (a)->tv_usec + (b)->tv_usec; \ 64 if ((res)->tv_usec >= 1000000) { \ 65 (res)->tv_usec -= 1000000; \ 66 (res)->tv_sec += 1; \ 67 } \ 68 } while (0) 69 70 #define timersub(a, b, res) \ 71 do { \ 72 (res)->tv_sec = (a)->tv_sec - (b)->tv_sec; \ 73 (res)->tv_usec = (a)->tv_usec - (b)->tv_usec; \ 74 if ((res)->tv_usec < 0) { \ 75 (res)->tv_usec += 1000000; \ 76 (res)->tv_sec -= 1; \ 77 } \ 78 } while (0) 79 80 #define TIMEVAL_TO_TIMESPEC(tv, ts) { \ 81 (ts)->tv_sec = (tv)->tv_sec; \ 82 (ts)->tv_nsec = (tv)->tv_usec * 1000; \ 83 } 84 #define TIMESPEC_TO_TIMEVAL(tv, ts) { \ 85 (tv)->tv_sec = (ts)->tv_sec; \ 86 (tv)->tv_usec = (ts)->tv_nsec / 1000; \ 87 } 88 89 __END_DECLS 90 91 #endif /* _SYS_TIME_H_ */ 92
