1 // 2 // Copyright (C) 2013 The Android Open Source Project 3 // 4 // Licensed under the Apache License, Version 2.0 (the "License"); 5 // you may not use this file except in compliance with the License. 6 // You may obtain a copy of the License at 7 // 8 // http://www.apache.org/licenses/LICENSE-2.0 9 // 10 // Unless required by applicable law or agreed to in writing, software 11 // distributed under the License is distributed on an "AS IS" BASIS, 12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 // See the License for the specific language governing permissions and 14 // limitations under the License. 15 // 16 17 #include "update_engine/common/clock.h" 18 19 #include <time.h> 20 21 namespace chromeos_update_engine { 22 GetWallclockTime()23 base::Time Clock::GetWallclockTime() { 24 return base::Time::Now(); 25 } 26 GetMonotonicTime()27 base::Time Clock::GetMonotonicTime() { 28 struct timespec now_ts; 29 if (clock_gettime(CLOCK_MONOTONIC_RAW, &now_ts) != 0) { 30 // Avoid logging this as an error as call-sites may call this very 31 // often and we don't want to fill up the disk. Note that this 32 // only fails if running on ancient kernels (CLOCK_MONOTONIC_RAW 33 // was added in Linux 2.6.28) so it never fails on a ChromeOS 34 // device. 35 return base::Time(); 36 } 37 struct timeval now_tv; 38 now_tv.tv_sec = now_ts.tv_sec; 39 now_tv.tv_usec = now_ts.tv_nsec / base::Time::kNanosecondsPerMicrosecond; 40 return base::Time::FromTimeVal(now_tv); 41 } 42 GetBootTime()43 base::Time Clock::GetBootTime() { 44 struct timespec now_ts; 45 if (clock_gettime(CLOCK_BOOTTIME, &now_ts) != 0) { 46 // Avoid logging this as an error as call-sites may call this very 47 // often and we don't want to fill up the disk. Note that this 48 // only fails if running on ancient kernels (CLOCK_BOOTTIME was 49 // added in Linux 2.6.39) so it never fails on a ChromeOS device. 50 return base::Time(); 51 } 52 struct timeval now_tv; 53 now_tv.tv_sec = now_ts.tv_sec; 54 now_tv.tv_usec = now_ts.tv_nsec / base::Time::kNanosecondsPerMicrosecond; 55 return base::Time::FromTimeVal(now_tv); 56 } 57 58 } // namespace chromeos_update_engine 59