1// 2// Copyright (C) 2012 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 "shill/net/shill_time.h" 18 19#include <string.h> 20#include <time.h> 21 22#include <base/format_macros.h> 23#include <base/strings/stringprintf.h> 24 25using std::string; 26 27namespace shill { 28 29namespace { 30 31// As Time may be instantiated by MemoryLogMessage during a callback of 32// AtExitManager, it needs to be a leaky singleton to avoid 33// AtExitManager::RegisterCallback() from potentially being called within a 34// callback of AtExitManager, which will lead to a crash. Making Time leaky is 35// fine as it does not need to clean up or release any resource at destruction. 36base::LazyInstance<Time>::Leaky g_time = LAZY_INSTANCE_INITIALIZER; 37 38} // namespace 39 40Time::Time() { } 41 42Time::~Time() { } 43 44Time* Time::GetInstance() { 45 return g_time.Pointer(); 46} 47 48bool Time::GetSecondsMonotonic(time_t* seconds) { 49 struct timeval now; 50 if (GetTimeMonotonic(&now) < 0) { 51 return false; 52 } else { 53 *seconds = now.tv_sec; 54 return true; 55 } 56} 57 58bool Time::GetSecondsBoottime(time_t* seconds) { 59 struct timeval now; 60 if (GetTimeBoottime(&now) < 0) { 61 return false; 62 } else { 63 *seconds = now.tv_sec; 64 return true; 65 } 66} 67 68int Time::GetTimeMonotonic(struct timeval* tv) { 69 struct timespec ts; 70 if (clock_gettime(CLOCK_MONOTONIC, &ts) != 0) { 71 return -1; 72 } 73 74 tv->tv_sec = ts.tv_sec; 75 tv->tv_usec = ts.tv_nsec / 1000; 76 return 0; 77} 78 79int Time::GetTimeBoottime(struct timeval* tv) { 80 struct timespec ts; 81 if (clock_gettime(CLOCK_BOOTTIME, &ts) != 0) { 82 return -1; 83 } 84 85 tv->tv_sec = ts.tv_sec; 86 tv->tv_usec = ts.tv_nsec / 1000; 87 return 0; 88} 89 90int Time::GetTimeOfDay(struct timeval* tv, struct timezone* tz) { 91 return gettimeofday(tv, tz); 92} 93 94Timestamp Time::GetNow() { 95 struct timeval now_monotonic = {}; 96 struct timeval now_boottime = {}; 97 struct timeval now_wall_clock = {}; 98 struct tm local_time = {}; 99 string wall_clock_string; 100 101 GetTimeMonotonic(&now_monotonic); 102 GetTimeBoottime(&now_boottime); 103 GetTimeOfDay(&now_wall_clock, nullptr); 104 localtime_r(&now_wall_clock.tv_sec, &local_time); 105 wall_clock_string = FormatTime(local_time, now_wall_clock.tv_usec); 106 107 return Timestamp(now_monotonic, now_boottime, wall_clock_string); 108} 109 110// static 111string Time::FormatTime(const struct tm& date_time, suseconds_t usec) { 112 char date_time_string[64]; 113 size_t date_time_length; 114 date_time_length = strftime(date_time_string, sizeof(date_time_string), 115 "%Y-%m-%dT%H:%M:%S %z", &date_time); 116 117 // Stitch in the microseconds, to provider finer resolution than 118 // strftime allows. 119 string full_string = "<unknown>"; 120 char* split_pos = static_cast<char*>( 121 memchr(date_time_string, ' ', sizeof(date_time_string))); 122 if (date_time_length && date_time_length < sizeof(date_time_string) && 123 split_pos) { 124 *split_pos = '\0'; 125 full_string = 126 base::StringPrintf("%s.%06" PRIu64 "%s", date_time_string, 127 static_cast<uint64_t>(usec), split_pos + 1); 128 } 129 130 return full_string; 131} 132 133time_t Time::GetSecondsSinceEpoch() const { 134 return time(nullptr); 135} 136 137} // namespace shill 138