1 /* 2 * Copyright (C) 2013 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 _BIONIC_TIME_CONVERSIONS_H 30 #define _BIONIC_TIME_CONVERSIONS_H 31 32 #include <errno.h> 33 #include <time.h> 34 #include <sys/cdefs.h> 35 36 #include "private/bionic_constants.h" 37 38 __BEGIN_DECLS 39 40 __LIBC_HIDDEN__ bool timespec_from_timeval(timespec& ts, const timeval& tv); 41 __LIBC_HIDDEN__ void timespec_from_ms(timespec& ts, const int ms); 42 43 __LIBC_HIDDEN__ void timeval_from_timespec(timeval& tv, const timespec& ts); 44 45 __LIBC_HIDDEN__ void monotonic_time_from_realtime_time(timespec& monotonic_time, 46 const timespec& realtime_time); 47 48 __END_DECLS 49 50 static inline int check_timespec(const timespec* ts, bool null_allowed) { 51 if (null_allowed && ts == nullptr) { 52 return 0; 53 } 54 // glibc just segfaults if you pass a null timespec. 55 // That seems a lot more likely to catch bad code than returning EINVAL. 56 if (ts->tv_nsec < 0 || ts->tv_nsec >= NS_PER_S) { 57 return EINVAL; 58 } 59 if (ts->tv_sec < 0) { 60 return ETIMEDOUT; 61 } 62 return 0; 63 } 64 65 #if !defined(__LP64__) 66 static inline void absolute_timespec_from_timespec(timespec& abs_ts, const timespec& ts, clockid_t clock) { 67 clock_gettime(clock, &abs_ts); 68 abs_ts.tv_sec += ts.tv_sec; 69 abs_ts.tv_nsec += ts.tv_nsec; 70 if (abs_ts.tv_nsec >= NS_PER_S) { 71 abs_ts.tv_nsec -= NS_PER_S; 72 abs_ts.tv_sec++; 73 } 74 } 75 #endif 76 77 #endif 78
