time_mac.cc revision b8cf94937c52feb53b55c39e3f82094d27de464c
1b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// Copyright (c) 2012 The Chromium Authors. All rights reserved. 2b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// Use of this source code is governed by a BSD-style license that can be 3b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// found in the LICENSE file. 4b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 5b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#include "base/time/time.h" 6b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 7b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#include <CoreFoundation/CFDate.h> 8b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#include <CoreFoundation/CFTimeZone.h> 9b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#include <mach/mach.h> 10b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#include <mach/mach_time.h> 11b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#include <stdint.h> 12b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#include <sys/sysctl.h> 13b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#include <sys/time.h> 14b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#include <sys/types.h> 15b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#include <time.h> 16b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 17b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#include "base/basictypes.h" 18b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#include "base/logging.h" 19b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#include "base/mac/mach_logging.h" 20b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#include "base/mac/scoped_cftyperef.h" 21b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#include "base/mac/scoped_mach_port.h" 22b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#include "base/numerics/safe_conversions.h" 23b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 24b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Eratnamespace { 25b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 26b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Eratint64_t ComputeCurrentTicks() { 27b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#if defined(OS_IOS) 28b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // On iOS mach_absolute_time stops while the device is sleeping. Instead use 29b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // now - KERN_BOOTTIME to get a time difference that is not impacted by clock 30b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // changes. KERN_BOOTTIME will be updated by the system whenever the system 31b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // clock change. 32b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat struct timeval boottime; 33b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat int mib[2] = {CTL_KERN, KERN_BOOTTIME}; 34b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat size_t size = sizeof(boottime); 35b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat int kr = sysctl(mib, arraysize(mib), &boottime, &size, NULL, 0); 36b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat DCHECK_EQ(KERN_SUCCESS, kr); 37b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat base::TimeDelta time_difference = base::Time::Now() - 38b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat (base::Time::FromTimeT(boottime.tv_sec) + 39b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat base::TimeDelta::FromMicroseconds(boottime.tv_usec)); 40b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat return time_difference.InMicroseconds(); 41b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#else 42b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat static mach_timebase_info_data_t timebase_info; 43b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat if (timebase_info.denom == 0) { 44b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // Zero-initialization of statics guarantees that denom will be 0 before 45b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // calling mach_timebase_info. mach_timebase_info will never set denom to 46b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // 0 as that would be invalid, so the zero-check can be used to determine 47b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // whether mach_timebase_info has already been called. This is 48b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // recommended by Apple's QA1398. 49b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat kern_return_t kr = mach_timebase_info(&timebase_info); 50b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat MACH_DCHECK(kr == KERN_SUCCESS, kr) << "mach_timebase_info"; 51b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat } 52b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 53b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // mach_absolute_time is it when it comes to ticks on the Mac. Other calls 54b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // with less precision (such as TickCount) just call through to 55b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // mach_absolute_time. 56b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 57b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // timebase_info converts absolute time tick units into nanoseconds. Convert 58b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // to microseconds up front to stave off overflows. 59b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat base::CheckedNumeric<uint64_t> result( 60b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat mach_absolute_time() / base::Time::kNanosecondsPerMicrosecond); 61b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat result *= timebase_info.numer; 62b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat result /= timebase_info.denom; 63b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 64b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // Don't bother with the rollover handling that the Windows version does. 65b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // With numer and denom = 1 (the expected case), the 64-bit absolute time 66b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // reported in nanoseconds is enough to last nearly 585 years. 67b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat return base::checked_cast<int64_t>(result.ValueOrDie()); 68b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#endif // defined(OS_IOS) 69b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat} 70b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 71b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Eratint64_t ComputeThreadTicks() { 72b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#if defined(OS_IOS) 73b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat NOTREACHED(); 74b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat return 0; 75b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#else 76b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat base::mac::ScopedMachSendRight thread(mach_thread_self()); 77b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat mach_msg_type_number_t thread_info_count = THREAD_BASIC_INFO_COUNT; 78b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat thread_basic_info_data_t thread_info_data; 79b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 80b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat if (thread.get() == MACH_PORT_NULL) { 81b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat DLOG(ERROR) << "Failed to get mach_thread_self()"; 82b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat return 0; 83b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat } 84b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 85b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat kern_return_t kr = thread_info( 86b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat thread, 87b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat THREAD_BASIC_INFO, 88b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat reinterpret_cast<thread_info_t>(&thread_info_data), 89b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat &thread_info_count); 90b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat MACH_DCHECK(kr == KERN_SUCCESS, kr) << "thread_info"; 91b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 92b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat base::CheckedNumeric<int64_t> absolute_micros( 93b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat thread_info_data.user_time.seconds); 94b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat absolute_micros *= base::Time::kMicrosecondsPerSecond; 95b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat absolute_micros += thread_info_data.user_time.microseconds; 96b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat return absolute_micros.ValueOrDie(); 97b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat#endif // defined(OS_IOS) 98b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat} 99b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 100b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat} // namespace 101b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 102b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Eratnamespace base { 103b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 104b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// The Time routines in this file use Mach and CoreFoundation APIs, since the 105b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// POSIX definition of time_t in Mac OS X wraps around after 2038--and 106b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// there are already cookie expiration dates, etc., past that time out in 107b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// the field. Using CFDate prevents that problem, and using mach_absolute_time 108b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// for TimeTicks gives us nice high-resolution interval timing. 109b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 110b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// Time ----------------------------------------------------------------------- 111b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 112b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// Core Foundation uses a double second count since 2001-01-01 00:00:00 UTC. 113b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// The UNIX epoch is 1970-01-01 00:00:00 UTC. 114b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// Windows uses a Gregorian epoch of 1601. We need to match this internally 115b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// so that our time representations match across all platforms. See bug 14734. 116b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// irb(main):010:0> Time.at(0).getutc() 117b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// => Thu Jan 01 00:00:00 UTC 1970 118b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// irb(main):011:0> Time.at(-11644473600).getutc() 119b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// => Mon Jan 01 00:00:00 UTC 1601 120b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Eratstatic const int64 kWindowsEpochDeltaSeconds = INT64_C(11644473600); 121b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 122b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// static 123b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Eratconst int64 Time::kWindowsEpochDeltaMicroseconds = 124b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat kWindowsEpochDeltaSeconds * Time::kMicrosecondsPerSecond; 125b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 126b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// Some functions in time.cc use time_t directly, so we provide an offset 127b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// to convert from time_t (Unix epoch) and internal (Windows epoch). 128b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// static 129b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Eratconst int64 Time::kTimeTToMicrosecondsOffset = kWindowsEpochDeltaMicroseconds; 130b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 131b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// static 132b8cf94937c52feb53b55c39e3f82094d27de464cDaniel EratTime Time::Now() { 133b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat return FromCFAbsoluteTime(CFAbsoluteTimeGetCurrent()); 134b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat} 135b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 136b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// static 137b8cf94937c52feb53b55c39e3f82094d27de464cDaniel EratTime Time::FromCFAbsoluteTime(CFAbsoluteTime t) { 138b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat COMPILE_ASSERT(std::numeric_limits<CFAbsoluteTime>::has_infinity, 139b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat numeric_limits_infinity_is_undefined_when_not_has_infinity); 140b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat if (t == 0) 141b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat return Time(); // Consider 0 as a null Time. 142b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat if (t == std::numeric_limits<CFAbsoluteTime>::infinity()) 143b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat return Max(); 144b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat return Time(static_cast<int64>( 145b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat (t + kCFAbsoluteTimeIntervalSince1970) * kMicrosecondsPerSecond) + 146b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat kWindowsEpochDeltaMicroseconds); 147b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat} 148b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 149b8cf94937c52feb53b55c39e3f82094d27de464cDaniel EratCFAbsoluteTime Time::ToCFAbsoluteTime() const { 150b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat COMPILE_ASSERT(std::numeric_limits<CFAbsoluteTime>::has_infinity, 151b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat numeric_limits_infinity_is_undefined_when_not_has_infinity); 152b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat if (is_null()) 153b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat return 0; // Consider 0 as a null Time. 154b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat if (is_max()) 155b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat return std::numeric_limits<CFAbsoluteTime>::infinity(); 156b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat return (static_cast<CFAbsoluteTime>(us_ - kWindowsEpochDeltaMicroseconds) / 157b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat kMicrosecondsPerSecond) - kCFAbsoluteTimeIntervalSince1970; 158b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat} 159b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 160b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// static 161b8cf94937c52feb53b55c39e3f82094d27de464cDaniel EratTime Time::NowFromSystemTime() { 162b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // Just use Now() because Now() returns the system time. 163b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat return Now(); 164b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat} 165b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 166b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// static 167b8cf94937c52feb53b55c39e3f82094d27de464cDaniel EratTime Time::FromExploded(bool is_local, const Exploded& exploded) { 168b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat CFGregorianDate date; 169b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat date.second = exploded.second + 170b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat exploded.millisecond / static_cast<double>(kMillisecondsPerSecond); 171b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat date.minute = exploded.minute; 172b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat date.hour = exploded.hour; 173b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat date.day = exploded.day_of_month; 174b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat date.month = exploded.month; 175b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat date.year = exploded.year; 176b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 177b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat base::ScopedCFTypeRef<CFTimeZoneRef> time_zone( 178b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat is_local ? CFTimeZoneCopySystem() : NULL); 179b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat CFAbsoluteTime seconds = CFGregorianDateGetAbsoluteTime(date, time_zone) + 180b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat kCFAbsoluteTimeIntervalSince1970; 181b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat return Time(static_cast<int64>(seconds * kMicrosecondsPerSecond) + 182b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat kWindowsEpochDeltaMicroseconds); 183b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat} 184b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 185b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Eratvoid Time::Explode(bool is_local, Exploded* exploded) const { 186b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // Avoid rounding issues, by only putting the integral number of seconds 187b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // (rounded towards -infinity) into a |CFAbsoluteTime| (which is a |double|). 188b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat int64 microsecond = us_ % kMicrosecondsPerSecond; 189b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat if (microsecond < 0) 190b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat microsecond += kMicrosecondsPerSecond; 191b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat CFAbsoluteTime seconds = ((us_ - microsecond) / kMicrosecondsPerSecond) - 192b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat kWindowsEpochDeltaSeconds - 193b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat kCFAbsoluteTimeIntervalSince1970; 194b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 195b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat base::ScopedCFTypeRef<CFTimeZoneRef> time_zone( 196b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat is_local ? CFTimeZoneCopySystem() : NULL); 197b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat CFGregorianDate date = CFAbsoluteTimeGetGregorianDate(seconds, time_zone); 198b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // 1 = Monday, ..., 7 = Sunday. 199b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat int cf_day_of_week = CFAbsoluteTimeGetDayOfWeek(seconds, time_zone); 200b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 201b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat exploded->year = date.year; 202b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat exploded->month = date.month; 203b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat exploded->day_of_week = cf_day_of_week % 7; 204b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat exploded->day_of_month = date.day; 205b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat exploded->hour = date.hour; 206b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat exploded->minute = date.minute; 207b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // Make sure seconds are rounded down towards -infinity. 208b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat exploded->second = floor(date.second); 209b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // Calculate milliseconds ourselves, since we rounded the |seconds|, making 210b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat // sure to round towards -infinity. 211b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat exploded->millisecond = 212b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat (microsecond >= 0) ? microsecond / kMicrosecondsPerMillisecond : 213b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat (microsecond - kMicrosecondsPerMillisecond + 1) / 214b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat kMicrosecondsPerMillisecond; 215b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat} 216b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 217b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// TimeTicks ------------------------------------------------------------------ 218b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 219b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// static 220b8cf94937c52feb53b55c39e3f82094d27de464cDaniel EratTimeTicks TimeTicks::Now() { 221b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat return TimeTicks(ComputeCurrentTicks()); 222b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat} 223b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 224b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// static 225b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Eratbool TimeTicks::IsHighResolution() { 226b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat return true; 227b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat} 228b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 229b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// static 230b8cf94937c52feb53b55c39e3f82094d27de464cDaniel EratThreadTicks ThreadTicks::Now() { 231b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat return ThreadTicks(ComputeThreadTicks()); 232b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat} 233b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 234b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat// static 235b8cf94937c52feb53b55c39e3f82094d27de464cDaniel EratTraceTicks TraceTicks::Now() { 236b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat return TraceTicks(ComputeCurrentTicks()); 237b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat} 238b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat 239b8cf94937c52feb53b55c39e3f82094d27de464cDaniel Erat} // namespace base 240