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 #include "private/bionic_time_conversions.h" 30 31 #include "private/bionic_constants.h" 32 33 bool timespec_from_timeval(timespec& ts, const timeval& tv) { 34 // Whole seconds can just be copied. 35 ts.tv_sec = tv.tv_sec; 36 37 // But we might overflow when converting microseconds to nanoseconds. 38 if (tv.tv_usec >= 1000000 || tv.tv_usec < 0) { 39 return false; 40 } 41 ts.tv_nsec = tv.tv_usec * 1000; 42 return true; 43 } 44 45 void timespec_from_ms(timespec& ts, const int ms) { 46 ts.tv_sec = ms / 1000; 47 ts.tv_nsec = (ms % 1000) * 1000000; 48 } 49 50 void timeval_from_timespec(timeval& tv, const timespec& ts) { 51 tv.tv_sec = ts.tv_sec; 52 tv.tv_usec = ts.tv_nsec / 1000; 53 } 54 55 void monotonic_time_from_realtime_time(timespec& monotonic_time, const timespec& realtime_time) { 56 monotonic_time = realtime_time; 57 58 timespec cur_monotonic_time; 59 clock_gettime(CLOCK_MONOTONIC, &cur_monotonic_time); 60 timespec cur_realtime_time; 61 clock_gettime(CLOCK_REALTIME, &cur_realtime_time); 62 63 monotonic_time.tv_nsec -= cur_realtime_time.tv_nsec; 64 monotonic_time.tv_nsec += cur_monotonic_time.tv_nsec; 65 if (monotonic_time.tv_nsec >= NS_PER_S) { 66 monotonic_time.tv_nsec -= NS_PER_S; 67 monotonic_time.tv_sec += 1; 68 } else if (monotonic_time.tv_nsec < 0) { 69 monotonic_time.tv_nsec += NS_PER_S; 70 monotonic_time.tv_sec -= 1; 71 } 72 monotonic_time.tv_sec -= cur_realtime_time.tv_sec; 73 monotonic_time.tv_sec += cur_monotonic_time.tv_sec; 74 } 75
