1dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// Copyright 2013 the V8 project authors. All rights reserved. 23484964a86451e86dcf04be9bd8c0d76ee04f081rossberg@chromium.org// Use of this source code is governed by a BSD-style license that can be 33484964a86451e86dcf04be9bd8c0d76ee04f081rossberg@chromium.org// found in the LICENSE file. 4dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 55de0074a922429f5e0ec2cf140c2d2989bf88140yangguo@chromium.org#ifndef V8_BASE_PLATFORM_TIME_H_ 65de0074a922429f5e0ec2cf140c2d2989bf88140yangguo@chromium.org#define V8_BASE_PLATFORM_TIME_H_ 7dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 8e31286d471eb2e656a1809383fa16b76053dd673machenbach@chromium.org#include <time.h> 9dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org#include <limits> 10dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 11248dd43badb99ffce44eae2d767cda3cefaad521machenbach@chromium.org#include "src/base/macros.h" 12dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 13dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// Forward declarations. 14dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.orgextern "C" { 15dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.orgstruct _FILETIME; 16e900018c7a2a695fde788911564da37535c7e736mstarzinger@chromium.orgstruct mach_timespec; 17e900018c7a2a695fde788911564da37535c7e736mstarzinger@chromium.orgstruct timespec; 18dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.orgstruct timeval; 19dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org} 20dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 21dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.orgnamespace v8 { 225de0074a922429f5e0ec2cf140c2d2989bf88140yangguo@chromium.orgnamespace base { 23dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 24dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.orgclass Time; 25dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.orgclass TimeTicks; 26dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 27dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// ----------------------------------------------------------------------------- 28dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// TimeDelta 29dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// 30dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// This class represents a duration of time, internally represented in 31dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// microseonds. 32dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 33ada3a6017e603965f87fa34f6e2fa60379e8d697machenbach@chromium.orgclass TimeDelta FINAL { 34dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org public: 35dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org TimeDelta() : delta_(0) {} 36dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 37dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Converts units of time to TimeDeltas. 38dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static TimeDelta FromDays(int days); 39dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static TimeDelta FromHours(int hours); 40dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static TimeDelta FromMinutes(int minutes); 41dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static TimeDelta FromSeconds(int64_t seconds); 42dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static TimeDelta FromMilliseconds(int64_t milliseconds); 43dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static TimeDelta FromMicroseconds(int64_t microseconds) { 44dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return TimeDelta(microseconds); 45dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 46dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static TimeDelta FromNanoseconds(int64_t nanoseconds); 47dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 48dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Returns the time delta in some unit. The F versions return a floating 49dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // point value, the "regular" versions return a rounded-down value. 50dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // 51dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // InMillisecondsRoundedUp() instead returns an integer that is rounded up 52dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // to the next full millisecond. 53dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org int InDays() const; 54dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org int InHours() const; 55dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org int InMinutes() const; 56dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org double InSecondsF() const; 57dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org int64_t InSeconds() const; 58dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org double InMillisecondsF() const; 59dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org int64_t InMilliseconds() const; 60dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org int64_t InMillisecondsRoundedUp() const; 61dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org int64_t InMicroseconds() const { return delta_; } 62dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org int64_t InNanoseconds() const; 63dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 64e900018c7a2a695fde788911564da37535c7e736mstarzinger@chromium.org // Converts to/from Mach time specs. 65e900018c7a2a695fde788911564da37535c7e736mstarzinger@chromium.org static TimeDelta FromMachTimespec(struct mach_timespec ts); 66e900018c7a2a695fde788911564da37535c7e736mstarzinger@chromium.org struct mach_timespec ToMachTimespec() const; 67e900018c7a2a695fde788911564da37535c7e736mstarzinger@chromium.org 68e900018c7a2a695fde788911564da37535c7e736mstarzinger@chromium.org // Converts to/from POSIX time specs. 69e900018c7a2a695fde788911564da37535c7e736mstarzinger@chromium.org static TimeDelta FromTimespec(struct timespec ts); 70e900018c7a2a695fde788911564da37535c7e736mstarzinger@chromium.org struct timespec ToTimespec() const; 71e900018c7a2a695fde788911564da37535c7e736mstarzinger@chromium.org 72dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org TimeDelta& operator=(const TimeDelta& other) { 73dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org delta_ = other.delta_; 74dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return *this; 75dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 76dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 77dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Computations with other deltas. 78dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org TimeDelta operator+(const TimeDelta& other) const { 79dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return TimeDelta(delta_ + other.delta_); 80dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 81dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org TimeDelta operator-(const TimeDelta& other) const { 82dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return TimeDelta(delta_ - other.delta_); 83dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 84dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 85dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org TimeDelta& operator+=(const TimeDelta& other) { 86dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org delta_ += other.delta_; 87dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return *this; 88dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 89dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org TimeDelta& operator-=(const TimeDelta& other) { 90dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org delta_ -= other.delta_; 91dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return *this; 92dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 93dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org TimeDelta operator-() const { 94dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return TimeDelta(-delta_); 95dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 96dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 97dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org double TimesOf(const TimeDelta& other) const { 98dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return static_cast<double>(delta_) / static_cast<double>(other.delta_); 99dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 100dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org double PercentOf(const TimeDelta& other) const { 101dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return TimesOf(other) * 100.0; 102dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 103dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 104dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Computations with ints, note that we only allow multiplicative operations 105dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // with ints, and additive operations with other deltas. 106dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org TimeDelta operator*(int64_t a) const { 107dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return TimeDelta(delta_ * a); 108dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 109dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org TimeDelta operator/(int64_t a) const { 110dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return TimeDelta(delta_ / a); 111dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 112dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org TimeDelta& operator*=(int64_t a) { 113dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org delta_ *= a; 114dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return *this; 115dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 116dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org TimeDelta& operator/=(int64_t a) { 117dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org delta_ /= a; 118dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return *this; 119dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 120dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org int64_t operator/(const TimeDelta& other) const { 121dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return delta_ / other.delta_; 122dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 123dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 124dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Comparison operators. 125dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool operator==(const TimeDelta& other) const { 126dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return delta_ == other.delta_; 127dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 128dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool operator!=(const TimeDelta& other) const { 129dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return delta_ != other.delta_; 130dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 131dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool operator<(const TimeDelta& other) const { 132dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return delta_ < other.delta_; 133dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 134dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool operator<=(const TimeDelta& other) const { 135dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return delta_ <= other.delta_; 136dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 137dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool operator>(const TimeDelta& other) const { 138dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return delta_ > other.delta_; 139dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 140dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool operator>=(const TimeDelta& other) const { 141dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return delta_ >= other.delta_; 142dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 143dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 144dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org private: 145dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Constructs a delta given the duration in microseconds. This is private 146dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // to avoid confusion by callers with an integer constructor. Use 147dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // FromSeconds, FromMilliseconds, etc. instead. 148dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org explicit TimeDelta(int64_t delta) : delta_(delta) {} 149dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 150dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Delta in microseconds. 151dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org int64_t delta_; 152dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org}; 153dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 154dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 155dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// ----------------------------------------------------------------------------- 156dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// Time 157dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// 158dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// This class represents an absolute point in time, internally represented as 159dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// microseconds (s/1,000,000) since 00:00:00 UTC, January 1, 1970. 160dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 161ada3a6017e603965f87fa34f6e2fa60379e8d697machenbach@chromium.orgclass Time FINAL { 162dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org public: 163dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static const int64_t kMillisecondsPerSecond = 1000; 164dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static const int64_t kMicrosecondsPerMillisecond = 1000; 165dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static const int64_t kMicrosecondsPerSecond = kMicrosecondsPerMillisecond * 166dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org kMillisecondsPerSecond; 167dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static const int64_t kMicrosecondsPerMinute = kMicrosecondsPerSecond * 60; 168dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static const int64_t kMicrosecondsPerHour = kMicrosecondsPerMinute * 60; 169dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static const int64_t kMicrosecondsPerDay = kMicrosecondsPerHour * 24; 170dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static const int64_t kMicrosecondsPerWeek = kMicrosecondsPerDay * 7; 171dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static const int64_t kNanosecondsPerMicrosecond = 1000; 172dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static const int64_t kNanosecondsPerSecond = kNanosecondsPerMicrosecond * 173dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org kMicrosecondsPerSecond; 174dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 175dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Contains the NULL time. Use Time::Now() to get the current time. 176dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org Time() : us_(0) {} 177dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 178dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Returns true if the time object has not been initialized. 179dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool IsNull() const { return us_ == 0; } 180dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 181dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Returns true if the time object is the maximum time. 182dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool IsMax() const { return us_ == std::numeric_limits<int64_t>::max(); } 183dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 184dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Returns the current time. Watch out, the system might adjust its clock 185dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // in which case time will actually go backwards. We don't guarantee that 186dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // times are increasing, or that two calls to Now() won't be the same. 187dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static Time Now(); 188dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 189dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Returns the current time. Same as Now() except that this function always 190dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // uses system time so that there are no discrepancies between the returned 191dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // time and system time even on virtual environments including our test bot. 192dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // For timing sensitive unittests, this function should be used. 193dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static Time NowFromSystemTime(); 194dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 195dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Returns the time for epoch in Unix-like system (Jan 1, 1970). 196dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static Time UnixEpoch() { return Time(0); } 197dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 198dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Returns the maximum time, which should be greater than any reasonable time 199dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // with which we might compare it. 200dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static Time Max() { return Time(std::numeric_limits<int64_t>::max()); } 201dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 202c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org // Converts to/from internal values. The meaning of the "internal value" is 203c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org // completely up to the implementation, so it should be treated as opaque. 204c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org static Time FromInternalValue(int64_t value) { 205c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org return Time(value); 206c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org } 207c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org int64_t ToInternalValue() const { 208c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org return us_; 209c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org } 210c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org 211e900018c7a2a695fde788911564da37535c7e736mstarzinger@chromium.org // Converts to/from POSIX time specs. 212e900018c7a2a695fde788911564da37535c7e736mstarzinger@chromium.org static Time FromTimespec(struct timespec ts); 213e900018c7a2a695fde788911564da37535c7e736mstarzinger@chromium.org struct timespec ToTimespec() const; 214e900018c7a2a695fde788911564da37535c7e736mstarzinger@chromium.org 215dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Converts to/from POSIX time values. 216dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static Time FromTimeval(struct timeval tv); 217dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org struct timeval ToTimeval() const; 218dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 219dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Converts to/from Windows file times. 220dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static Time FromFiletime(struct _FILETIME ft); 221dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org struct _FILETIME ToFiletime() const; 222dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 223dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Converts to/from the Javascript convention for times, a number of 224dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // milliseconds since the epoch: 225dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static Time FromJsTime(double ms_since_epoch); 226dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org double ToJsTime() const; 227dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 228dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org Time& operator=(const Time& other) { 229dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org us_ = other.us_; 230dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return *this; 231dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 232dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 233dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Compute the difference between two times. 234dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org TimeDelta operator-(const Time& other) const { 235dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return TimeDelta::FromMicroseconds(us_ - other.us_); 236dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 237dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 238dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Modify by some time delta. 239dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org Time& operator+=(const TimeDelta& delta) { 240dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org us_ += delta.InMicroseconds(); 241dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return *this; 242dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 243dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org Time& operator-=(const TimeDelta& delta) { 244dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org us_ -= delta.InMicroseconds(); 245dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return *this; 246dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 247dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 248dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Return a new time modified by some delta. 249dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org Time operator+(const TimeDelta& delta) const { 250dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return Time(us_ + delta.InMicroseconds()); 251dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 252dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org Time operator-(const TimeDelta& delta) const { 253dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return Time(us_ - delta.InMicroseconds()); 254dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 255dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 256dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Comparison operators 257dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool operator==(const Time& other) const { 258dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return us_ == other.us_; 259dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 260dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool operator!=(const Time& other) const { 261dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return us_ != other.us_; 262dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 263dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool operator<(const Time& other) const { 264dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return us_ < other.us_; 265dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 266dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool operator<=(const Time& other) const { 267dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return us_ <= other.us_; 268dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 269dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool operator>(const Time& other) const { 270dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return us_ > other.us_; 271dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 272dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool operator>=(const Time& other) const { 273dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return us_ >= other.us_; 274dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 275dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 276dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org private: 277dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org explicit Time(int64_t us) : us_(us) {} 278dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 279dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Time in microseconds in UTC. 280dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org int64_t us_; 281dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org}; 282dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 283dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.orginline Time operator+(const TimeDelta& delta, const Time& time) { 284dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return time + delta; 285dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org} 286dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 287dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 288dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// ----------------------------------------------------------------------------- 289dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// TimeTicks 290dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// 291dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// This class represents an abstract time that is most of the time incrementing 292dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// for use in measuring time durations. It is internally represented in 293dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// microseconds. It can not be converted to a human-readable time, but is 294dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// guaranteed not to decrease (if the user changes the computer clock, 295dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// Time::Now() may actually decrease or jump). But note that TimeTicks may 296dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org// "stand still", for example if the computer suspended. 297dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 298ada3a6017e603965f87fa34f6e2fa60379e8d697machenbach@chromium.orgclass TimeTicks FINAL { 299dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org public: 300dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org TimeTicks() : ticks_(0) {} 301dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 302dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Platform-dependent tick count representing "right now." 303dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // The resolution of this clock is ~1-15ms. Resolution varies depending 304dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // on hardware/operating system configuration. 305dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // This method never returns a null TimeTicks. 306dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org static TimeTicks Now(); 307dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 308dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Returns a platform-dependent high-resolution tick count. Implementation 309dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // is hardware dependent and may or may not return sub-millisecond 310dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // resolution. THIS CALL IS GENERALLY MUCH MORE EXPENSIVE THAN Now() AND 311dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // SHOULD ONLY BE USED WHEN IT IS REALLY NEEDED. 312dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // This method never returns a null TimeTicks. 313d8a3a149cb9dac7437e264a2fe50f680418c3a45jkummerow@chromium.org static TimeTicks HighResolutionNow(); 314d8a3a149cb9dac7437e264a2fe50f680418c3a45jkummerow@chromium.org 315d8a3a149cb9dac7437e264a2fe50f680418c3a45jkummerow@chromium.org // Returns true if the high-resolution clock is working on this system. 316d8a3a149cb9dac7437e264a2fe50f680418c3a45jkummerow@chromium.org static bool IsHighResolutionClockWorking(); 317dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 318d0bddc653152f270a27fe32d5d7b0f5c0fa3b00cmachenbach@chromium.org // Returns Linux kernel timestamp for generating profiler events. This method 319d0bddc653152f270a27fe32d5d7b0f5c0fa3b00cmachenbach@chromium.org // returns null TimeTicks if the kernel cannot provide the timestamps (e.g., 320d0bddc653152f270a27fe32d5d7b0f5c0fa3b00cmachenbach@chromium.org // on non-Linux OS or if the kernel module for timestamps is not loaded). 321d0bddc653152f270a27fe32d5d7b0f5c0fa3b00cmachenbach@chromium.org 322d0bddc653152f270a27fe32d5d7b0f5c0fa3b00cmachenbach@chromium.org static TimeTicks KernelTimestampNow(); 323d0bddc653152f270a27fe32d5d7b0f5c0fa3b00cmachenbach@chromium.org static bool KernelTimestampAvailable(); 324d0bddc653152f270a27fe32d5d7b0f5c0fa3b00cmachenbach@chromium.org 325dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Returns true if this object has not been initialized. 326dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool IsNull() const { return ticks_ == 0; } 327dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 328c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org // Converts to/from internal values. The meaning of the "internal value" is 329c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org // completely up to the implementation, so it should be treated as opaque. 330c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org static TimeTicks FromInternalValue(int64_t value) { 331c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org return TimeTicks(value); 332c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org } 333c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org int64_t ToInternalValue() const { 334c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org return ticks_; 335c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org } 336c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org 337dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org TimeTicks& operator=(const TimeTicks other) { 338dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org ticks_ = other.ticks_; 339dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return *this; 340dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 341dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 342dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Compute the difference between two times. 343dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org TimeDelta operator-(const TimeTicks other) const { 344dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return TimeDelta::FromMicroseconds(ticks_ - other.ticks_); 345dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 346dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 347dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Modify by some time delta. 348dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org TimeTicks& operator+=(const TimeDelta& delta) { 349dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org ticks_ += delta.InMicroseconds(); 350dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return *this; 351dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 352dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org TimeTicks& operator-=(const TimeDelta& delta) { 353dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org ticks_ -= delta.InMicroseconds(); 354dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return *this; 355dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 356dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 357dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Return a new TimeTicks modified by some delta. 358dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org TimeTicks operator+(const TimeDelta& delta) const { 359dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return TimeTicks(ticks_ + delta.InMicroseconds()); 360dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 361dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org TimeTicks operator-(const TimeDelta& delta) const { 362dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return TimeTicks(ticks_ - delta.InMicroseconds()); 363dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 364dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 365dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Comparison operators 366dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool operator==(const TimeTicks& other) const { 367dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return ticks_ == other.ticks_; 368dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 369dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool operator!=(const TimeTicks& other) const { 370dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return ticks_ != other.ticks_; 371dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 372dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool operator<(const TimeTicks& other) const { 373dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return ticks_ < other.ticks_; 374dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 375dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool operator<=(const TimeTicks& other) const { 376dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return ticks_ <= other.ticks_; 377dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 378dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool operator>(const TimeTicks& other) const { 379dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return ticks_ > other.ticks_; 380dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 381dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org bool operator>=(const TimeTicks& other) const { 382dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return ticks_ >= other.ticks_; 383dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org } 384dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 385dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org private: 386dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Please use Now() to create a new object. This is for internal use 387dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // and testing. Ticks is in microseconds. 388dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org explicit TimeTicks(int64_t ticks) : ticks_(ticks) {} 389dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 390dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org // Tick count in microseconds. 391dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org int64_t ticks_; 392dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org}; 393dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 394dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.orginline TimeTicks operator+(const TimeDelta& delta, const TimeTicks& ticks) { 395dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org return ticks + delta; 396dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org} 397dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 3985de0074a922429f5e0ec2cf140c2d2989bf88140yangguo@chromium.org} } // namespace v8::base 399dc94e19484d1700cb0ec22365444223e49a3ac1ejkummerow@chromium.org 4005de0074a922429f5e0ec2cf140c2d2989bf88140yangguo@chromium.org#endif // V8_BASE_PLATFORM_TIME_H_ 401