| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Time represents an absolute point in time, internally represented as |
| // microseconds (s/1,000,000) since the Windows epoch (1601-01-01 00:00:00 UTC) |
| // (See http://crbug.com/14734). System-dependent clock interface routines are |
| // defined in time_PLATFORM.cc. |
| // |
| // TimeDelta represents a duration of time, internally represented in |
| // microseconds. |
| // |
| // TimeTicks represents an abstract time that is most of the time incrementing |
| // for use in measuring time durations. It is internally represented in |
| // microseconds. It can not be converted to a human-readable time, but is |
| // guaranteed not to decrease (if the user changes the computer clock, |
| // Time::Now() may actually decrease or jump). But note that TimeTicks may |
| // "stand still", for example if the computer suspended. |
| // |
| // These classes are represented as only a 64-bit value, so they can be |
| // efficiently passed by value. |
| |
| #ifndef BASE_TIME_H_ |
| #define BASE_TIME_H_ |
| |
| #include <time.h> |
| |
| #include "base/atomicops.h" |
| #include "base/base_export.h" |
| #include "base/basictypes.h" |
| |
| #if defined(OS_MACOSX) |
| #include <CoreFoundation/CoreFoundation.h> |
| // Avoid Mac system header macro leak. |
| #undef TYPE_BOOL |
| #endif |
| |
| #if defined(OS_POSIX) |
| // For struct timeval. |
| #include <sys/time.h> |
| #endif |
| |
| #if defined(OS_STARBOARD) |
| #include "starboard/time.h" |
| #endif |
| |
| #if defined(OS_WIN) |
| // For FILETIME in FromFileTime, until it moves to a new converter class. |
| // See TODO(iyengar) below. |
| #include <windows.h> |
| #endif |
| |
| #include <limits> |
| |
| namespace base { |
| |
| class Time; |
| class TimeTicks; |
| |
| // TimeDelta ------------------------------------------------------------------ |
| |
| class BASE_EXPORT TimeDelta { |
| public: |
| TimeDelta() : delta_(0) { |
| } |
| |
| // Converts units of time to TimeDeltas. |
| static TimeDelta FromDays(int days); |
| static TimeDelta FromHours(int hours); |
| static TimeDelta FromMinutes(int minutes); |
| static TimeDelta FromSeconds(int64 secs); |
| static TimeDelta FromMilliseconds(int64 ms); |
| static TimeDelta FromSecondsD(double secs); |
| static TimeDelta FromMillisecondsD(double ms); |
| static TimeDelta FromMicroseconds(int64 us); |
| #if defined(OS_WIN) |
| static TimeDelta FromQPCValue(LONGLONG qpc_value); |
| #endif |
| |
| // Converts an integer value representing TimeDelta to a class. This is used |
| // when deserializing a |TimeDelta| structure, using a value known to be |
| // compatible. It is not provided as a constructor because the integer type |
| // may be unclear from the perspective of a caller. |
| static TimeDelta FromInternalValue(int64 delta) { |
| return TimeDelta(delta); |
| } |
| |
| // Returns the maximum time delta, which should be greater than any reasonable |
| // time delta we might compare it to. Adding or subtracting the maximum time |
| // delta to a time or another time delta has an undefined result. |
| static TimeDelta Max(); |
| |
| // Returns the internal numeric value of the TimeDelta object. Please don't |
| // use this and do arithmetic on it, as it is more error prone than using the |
| // provided operators. |
| // For serializing, use FromInternalValue to reconstitute. |
| int64 ToInternalValue() const { |
| return delta_; |
| } |
| |
| // Returns true if the time delta is the maximum time delta. |
| bool is_max() const { |
| return delta_ == std::numeric_limits<int64>::max(); |
| } |
| |
| #if defined(OS_STARBOARD) |
| SbTime ToSbTime() const; |
| #endif |
| |
| #if defined(OS_POSIX) |
| struct timespec ToTimeSpec() const; |
| #endif |
| |
| // Returns the time delta in some unit. The F versions return a floating |
| // point value, the "regular" versions return a rounded-down value. |
| // |
| // InMillisecondsRoundedUp() instead returns an integer that is rounded up |
| // to the next full millisecond. |
| int InDays() const; |
| int InHours() const; |
| int InMinutes() const; |
| double InSecondsF() const; |
| int64 InSeconds() const; |
| double InMillisecondsF() const; |
| int64 InMilliseconds() const; |
| int64 InMillisecondsRoundedUp() const; |
| int64 InMicroseconds() const; |
| |
| TimeDelta& operator=(TimeDelta other) { |
| delta_ = other.delta_; |
| return *this; |
| } |
| |
| // Computations with other deltas. |
| TimeDelta operator+(TimeDelta other) const { |
| return TimeDelta(delta_ + other.delta_); |
| } |
| TimeDelta operator-(TimeDelta other) const { |
| return TimeDelta(delta_ - other.delta_); |
| } |
| |
| TimeDelta& operator+=(TimeDelta other) { |
| delta_ += other.delta_; |
| return *this; |
| } |
| TimeDelta& operator-=(TimeDelta other) { |
| delta_ -= other.delta_; |
| return *this; |
| } |
| TimeDelta operator-() const { |
| return TimeDelta(-delta_); |
| } |
| |
| // Computations with ints, note that we only allow multiplicative operations |
| // with ints, and additive operations with other deltas. |
| TimeDelta operator*(int64 a) const { |
| return TimeDelta(delta_ * a); |
| } |
| TimeDelta operator/(int64 a) const { |
| return TimeDelta(delta_ / a); |
| } |
| TimeDelta& operator*=(int64 a) { |
| delta_ *= a; |
| return *this; |
| } |
| TimeDelta& operator/=(int64 a) { |
| delta_ /= a; |
| return *this; |
| } |
| int64 operator/(TimeDelta a) const { |
| return delta_ / a.delta_; |
| } |
| |
| // Defined below because it depends on the definition of the other classes. |
| Time operator+(Time t) const; |
| TimeTicks operator+(TimeTicks t) const; |
| |
| // Comparison operators. |
| bool operator==(TimeDelta other) const { |
| return delta_ == other.delta_; |
| } |
| bool operator!=(TimeDelta other) const { |
| return delta_ != other.delta_; |
| } |
| bool operator<(TimeDelta other) const { |
| return delta_ < other.delta_; |
| } |
| bool operator<=(TimeDelta other) const { |
| return delta_ <= other.delta_; |
| } |
| bool operator>(TimeDelta other) const { |
| return delta_ > other.delta_; |
| } |
| bool operator>=(TimeDelta other) const { |
| return delta_ >= other.delta_; |
| } |
| |
| private: |
| friend class Time; |
| friend class TimeTicks; |
| friend TimeDelta operator*(int64 a, TimeDelta td); |
| |
| // Constructs a delta given the duration in microseconds. This is private |
| // to avoid confusion by callers with an integer constructor. Use |
| // FromSeconds, FromMilliseconds, etc. instead. |
| explicit TimeDelta(int64 delta_us) : delta_(delta_us) { |
| } |
| |
| // Delta in microseconds. |
| int64 delta_; |
| }; |
| |
| inline TimeDelta operator*(int64 a, TimeDelta td) { |
| return TimeDelta(a * td.delta_); |
| } |
| |
| // Time ----------------------------------------------------------------------- |
| |
| // Represents a wall clock time. |
| class BASE_EXPORT Time { |
| public: |
| static const int64 kMillisecondsPerSecond = 1000; |
| static const int64 kMicrosecondsPerMillisecond = 1000; |
| static const int64 kMicrosecondsPerSecond = kMicrosecondsPerMillisecond * |
| kMillisecondsPerSecond; |
| static const int64 kMicrosecondsPerMinute = kMicrosecondsPerSecond * 60; |
| static const int64 kMicrosecondsPerHour = kMicrosecondsPerMinute * 60; |
| static const int64 kMicrosecondsPerDay = kMicrosecondsPerHour * 24; |
| static const int64 kMicrosecondsPerWeek = kMicrosecondsPerDay * 7; |
| static const int64 kNanosecondsPerMicrosecond = 1000; |
| static const int64 kNanosecondsPerSecond = kNanosecondsPerMicrosecond * |
| kMicrosecondsPerSecond; |
| |
| #if !defined(OS_WIN) && !defined(OS_STARBOARD) |
| // On Mac & Linux, this value is the delta from the Windows epoch of 1601 to |
| // the Posix delta of 1970. This is used for migrating between the old |
| // 1970-based epochs to the new 1601-based ones. It should be removed from |
| // this global header and put in the platform-specific ones when we remove the |
| // migration code. |
| static const int64 kWindowsEpochDeltaMicroseconds; |
| #endif |
| |
| // Represents an exploded time that can be formatted nicely. This is kind of |
| // like the Win32 SYSTEMTIME structure or the Unix "struct tm" with a few |
| // additions and changes to prevent errors. |
| struct BASE_EXPORT Exploded { |
| int year; // Four digit year "2007" |
| int month; // 1-based month (values 1 = January, etc.) |
| int day_of_week; // 0-based day of week (0 = Sunday, etc.) |
| int day_of_month; // 1-based day of month (1-31) |
| int hour; // Hour within the current day (0-23) |
| int minute; // Minute within the current hour (0-59) |
| int second; // Second within the current minute (0-59 plus leap |
| // seconds which may take it up to 60). |
| int millisecond; // Milliseconds within the current second (0-999) |
| |
| // A cursory test for whether the data members are within their |
| // respective ranges. A 'true' return value does not guarantee the |
| // Exploded value can be successfully converted to a Time value. |
| bool HasValidValues() const; |
| }; |
| |
| // Contains the NULL time. Use Time::Now() to get the current time. |
| Time() : us_(0) { |
| } |
| |
| // Returns true if the time object has not been initialized. |
| bool is_null() const { |
| return us_ == 0; |
| } |
| |
| // Returns true if the time object is the maximum time. |
| bool is_max() const { |
| return us_ == std::numeric_limits<int64>::max(); |
| } |
| |
| // Returns the time for epoch in Unix-like system (Jan 1, 1970). |
| static Time UnixEpoch(); |
| |
| // Returns the current time. Watch out, the system might adjust its clock |
| // in which case time will actually go backwards. We don't guarantee that |
| // times are increasing, or that two calls to Now() won't be the same. |
| static Time Now(); |
| |
| // Returns the maximum time, which should be greater than any reasonable time |
| // with which we might compare it. |
| static Time Max(); |
| |
| // Returns the current time. Same as Now() except that this function always |
| // uses system time so that there are no discrepancies between the returned |
| // time and system time even on virtual environments including our test bot. |
| // For timing sensitive unittests, this function should be used. |
| static Time NowFromSystemTime(); |
| |
| // Converts to/from time_t in UTC and a Time class. |
| // TODO(brettw) this should be removed once everybody starts using the |Time| |
| // class. |
| static Time FromTimeT(time_t tt); |
| time_t ToTimeT() const; |
| |
| // Converts time to/from a double which is the number of seconds since epoch |
| // (Jan 1, 1970). Webkit uses this format to represent time. |
| // Because WebKit initializes double time value to 0 to indicate "not |
| // initialized", we map it to empty Time object that also means "not |
| // initialized". |
| static Time FromDoubleT(double dt); |
| double ToDoubleT() const; |
| |
| // Converts to/from the Javascript convention for times, a number of |
| // milliseconds since the epoch: |
| // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Date/getTime. |
| static Time FromJsTime(double ms_since_epoch); |
| double ToJsTime() const; |
| |
| #if defined(OS_STARBOARD) |
| static Time FromSbTime(SbTime t); |
| SbTime ToSbTime() const; |
| #endif |
| |
| #if defined(OS_POSIX) |
| static Time FromTimeVal(struct timeval t); |
| struct timeval ToTimeVal() const; |
| #endif |
| |
| #if defined(OS_MACOSX) |
| static Time FromCFAbsoluteTime(CFAbsoluteTime t); |
| CFAbsoluteTime ToCFAbsoluteTime() const; |
| #endif |
| |
| #if defined(OS_WIN) |
| static Time FromFileTime(FILETIME ft); |
| FILETIME ToFileTime() const; |
| |
| // The minimum time of a low resolution timer. This is basically a windows |
| // constant of ~15.6ms. While it does vary on some older OS versions, we'll |
| // treat it as static across all windows versions. |
| static const int kMinLowResolutionThresholdMs = 16; |
| |
| // Enable or disable Windows high resolution timer. If the high resolution |
| // timer is not enabled, calls to ActivateHighResolutionTimer will fail. |
| // When disabling the high resolution timer, this function will not cause |
| // the high resolution timer to be deactivated, but will prevent future |
| // activations. |
| // Must be called from the main thread. |
| // For more details see comments in time_win.cc. |
| static void EnableHighResolutionTimer(bool enable); |
| |
| // Activates or deactivates the high resolution timer based on the |activate| |
| // flag. If the HighResolutionTimer is not Enabled (see |
| // EnableHighResolutionTimer), this function will return false. Otherwise |
| // returns true. Each successful activate call must be paired with a |
| // subsequent deactivate call. |
| // All callers to activate the high resolution timer must eventually call |
| // this function to deactivate the high resolution timer. |
| static bool ActivateHighResolutionTimer(bool activate); |
| |
| // Returns true if the high resolution timer is both enabled and activated. |
| // This is provided for testing only, and is not tracked in a thread-safe |
| // way. |
| static bool IsHighResolutionTimerInUse(); |
| #endif |
| |
| // Converts an exploded structure representing either the local time or UTC |
| // into a Time class. |
| static Time FromUTCExploded(const Exploded& exploded) { |
| return FromExploded(false, exploded); |
| } |
| static Time FromLocalExploded(const Exploded& exploded) { |
| return FromExploded(true, exploded); |
| } |
| |
| // Converts an integer value representing Time to a class. This is used |
| // when deserializing a |Time| structure, using a value known to be |
| // compatible. It is not provided as a constructor because the integer type |
| // may be unclear from the perspective of a caller. |
| static Time FromInternalValue(int64 us) { |
| return Time(us); |
| } |
| |
| // Converts a string representation of time to a Time object. |
| // An example of a time string which is converted is as below:- |
| // "Tue, 15 Nov 1994 12:45:26 GMT". If the timezone is not specified |
| // in the input string, FromString assumes local time and FromUTCString |
| // assumes UTC. A timezone that cannot be parsed (e.g. "UTC" which is not |
| // specified in RFC822) is treated as if the timezone is not specified. |
| // TODO(iyengar) Move the FromString/FromTimeT/ToTimeT/FromFileTime to |
| // a new time converter class. |
| static bool FromString(const char* time_string, Time* parsed_time) { |
| return FromStringInternal(time_string, true, parsed_time); |
| } |
| static bool FromUTCString(const char* time_string, Time* parsed_time) { |
| return FromStringInternal(time_string, false, parsed_time); |
| } |
| |
| // For serializing, use FromInternalValue to reconstitute. Please don't use |
| // this and do arithmetic on it, as it is more error prone than using the |
| // provided operators. |
| int64 ToInternalValue() const { |
| return us_; |
| } |
| |
| // Fills the given exploded structure with either the local time or UTC from |
| // this time structure (containing UTC). |
| void UTCExplode(Exploded* exploded) const { |
| return Explode(false, exploded); |
| } |
| void LocalExplode(Exploded* exploded) const { |
| return Explode(true, exploded); |
| } |
| |
| // Rounds this time down to the nearest day in local time. It will represent |
| // midnight on that day. |
| Time LocalMidnight() const; |
| |
| Time& operator=(Time other) { |
| us_ = other.us_; |
| return *this; |
| } |
| |
| // Compute the difference between two times. |
| TimeDelta operator-(Time other) const { |
| return TimeDelta(us_ - other.us_); |
| } |
| |
| // Modify by some time delta. |
| Time& operator+=(TimeDelta delta) { |
| us_ += delta.delta_; |
| return *this; |
| } |
| Time& operator-=(TimeDelta delta) { |
| us_ -= delta.delta_; |
| return *this; |
| } |
| |
| // Return a new time modified by some delta. |
| Time operator+(TimeDelta delta) const { |
| return Time(us_ + delta.delta_); |
| } |
| Time operator-(TimeDelta delta) const { |
| return Time(us_ - delta.delta_); |
| } |
| |
| // Comparison operators |
| bool operator==(Time other) const { |
| return us_ == other.us_; |
| } |
| bool operator!=(Time other) const { |
| return us_ != other.us_; |
| } |
| bool operator<(Time other) const { |
| return us_ < other.us_; |
| } |
| bool operator<=(Time other) const { |
| return us_ <= other.us_; |
| } |
| bool operator>(Time other) const { |
| return us_ > other.us_; |
| } |
| bool operator>=(Time other) const { |
| return us_ >= other.us_; |
| } |
| |
| private: |
| friend class TimeDelta; |
| |
| explicit Time(int64 us) : us_(us) { |
| } |
| |
| // Explodes the given time to either local time |is_local = true| or UTC |
| // |is_local = false|. |
| void Explode(bool is_local, Exploded* exploded) const; |
| |
| // Unexplodes a given time assuming the source is either local time |
| // |is_local = true| or UTC |is_local = false|. |
| static Time FromExploded(bool is_local, const Exploded& exploded); |
| |
| // Converts a string representation of time to a Time object. |
| // An example of a time string which is converted is as below:- |
| // "Tue, 15 Nov 1994 12:45:26 GMT". If the timezone is not specified |
| // in the input string, local time |is_local = true| or |
| // UTC |is_local = false| is assumed. A timezone that cannot be parsed |
| // (e.g. "UTC" which is not specified in RFC822) is treated as if the |
| // timezone is not specified. |
| static bool FromStringInternal(const char* time_string, |
| bool is_local, |
| Time* parsed_time); |
| |
| // The representation of Jan 1, 1970 UTC in microseconds since the |
| // platform-dependent epoch. |
| static const int64 kTimeTToMicrosecondsOffset; |
| |
| #if defined(OS_WIN) |
| // Indicates whether fast timers are usable right now. For instance, |
| // when using battery power, we might elect to prevent high speed timers |
| // which would draw more power. |
| static bool high_resolution_timer_enabled_; |
| // Count of activations on the high resolution timer. Only use in tests |
| // which are single threaded. |
| static int high_resolution_timer_activated_; |
| #endif |
| |
| // Time in microseconds in UTC. |
| int64 us_; |
| }; |
| |
| // Inline the TimeDelta factory methods, for fast TimeDelta construction. |
| |
| // static |
| inline TimeDelta TimeDelta::FromDays(int days) { |
| // Preserve max to prevent overflow. |
| if (days == std::numeric_limits<int>::max()) |
| return Max(); |
| return TimeDelta(days * Time::kMicrosecondsPerDay); |
| } |
| |
| // static |
| inline TimeDelta TimeDelta::FromHours(int hours) { |
| // Preserve max to prevent overflow. |
| if (hours == std::numeric_limits<int>::max()) |
| return Max(); |
| return TimeDelta(hours * Time::kMicrosecondsPerHour); |
| } |
| |
| // static |
| inline TimeDelta TimeDelta::FromMinutes(int minutes) { |
| // Preserve max to prevent overflow. |
| if (minutes == std::numeric_limits<int>::max()) |
| return Max(); |
| return TimeDelta(minutes * Time::kMicrosecondsPerMinute); |
| } |
| |
| // static |
| inline TimeDelta TimeDelta::FromSeconds(int64 secs) { |
| // Preserve max to prevent overflow. |
| if (secs == std::numeric_limits<int64>::max()) |
| return Max(); |
| return TimeDelta(secs * Time::kMicrosecondsPerSecond); |
| } |
| |
| // static |
| inline TimeDelta TimeDelta::FromMilliseconds(int64 ms) { |
| // Preserve max to prevent overflow. |
| if (ms == std::numeric_limits<int64>::max()) |
| return Max(); |
| return TimeDelta(ms * Time::kMicrosecondsPerMillisecond); |
| } |
| |
| // static |
| inline TimeDelta TimeDelta::FromSecondsD(double secs) { |
| // Preserve max to prevent overflow. |
| if (secs == std::numeric_limits<double>::infinity()) |
| return Max(); |
| return TimeDelta( |
| static_cast<int64>(secs * Time::kMicrosecondsPerSecond)); |
| } |
| |
| // static |
| inline TimeDelta TimeDelta::FromMillisecondsD(double ms) { |
| // Preserve max to prevent overflow. |
| if (ms == std::numeric_limits<double>::infinity()) |
| return Max(); |
| return TimeDelta( |
| static_cast<int64>(ms * Time::kMicrosecondsPerMillisecond)); |
| } |
| |
| // static |
| inline TimeDelta TimeDelta::FromMicroseconds(int64 us) { |
| // Preserve max to prevent overflow. |
| if (us == std::numeric_limits<int64>::max()) |
| return Max(); |
| return TimeDelta(us); |
| } |
| |
| inline Time TimeDelta::operator+(Time t) const { |
| return Time(t.us_ + delta_); |
| } |
| |
| // TimeTicks ------------------------------------------------------------------ |
| |
| class BASE_EXPORT TimeTicks { |
| public: |
| TimeTicks() : ticks_(0) { |
| } |
| |
| // Platform-dependent tick count representing "right now." |
| // The resolution of this clock is ~1-15ms. Resolution varies depending |
| // on hardware/operating system configuration. |
| static TimeTicks Now(); |
| |
| // Returns a platform-dependent high-resolution tick count. Implementation |
| // is hardware dependent and may or may not return sub-millisecond |
| // resolution. THIS CALL IS GENERALLY MUCH MORE EXPENSIVE THAN Now() AND |
| // SHOULD ONLY BE USED WHEN IT IS REALLY NEEDED. |
| static TimeTicks HighResNow(); |
| |
| // Returns the amount of time the current thread has spent in the execution |
| // state (i.e. not pre-empted or waiting on some event). If this is not |
| // available, then HighResNow() will be returned. |
| static TimeTicks ThreadNow(); |
| |
| // Returns whether ThreadNow() is implemented to report thread time (as |
| // opposed to HighResNow()). |
| static bool HasThreadNow(); |
| |
| // Returns the current system trace time or, if none is defined, the current |
| // high-res time (i.e. HighResNow()). On systems where a global trace clock |
| // is defined, timestamping TraceEvents's with this value guarantees |
| // synchronization between events collected inside chrome and events |
| // collected outside (e.g. kernel, X server). |
| static TimeTicks NowFromSystemTraceTime(); |
| |
| #if defined(OS_WIN) |
| // Get the absolute value of QPC time drift. For testing. |
| static int64 GetQPCDriftMicroseconds(); |
| |
| static TimeTicks FromQPCValue(LONGLONG qpc_value); |
| |
| // Returns true if the high resolution clock is working on this system. |
| // This is only for testing. |
| static bool IsHighResClockWorking(); |
| #endif |
| |
| // Returns true if this object has not been initialized. |
| bool is_null() const { |
| return ticks_ == 0; |
| } |
| |
| // Converts an integer value representing TimeTicks to a class. This is used |
| // when deserializing a |TimeTicks| structure, using a value known to be |
| // compatible. It is not provided as a constructor because the integer type |
| // may be unclear from the perspective of a caller. |
| static TimeTicks FromInternalValue(int64 ticks) { |
| return TimeTicks(ticks); |
| } |
| |
| // Returns the internal numeric value of the TimeTicks object. |
| // For serializing, use FromInternalValue to reconstitute. |
| int64 ToInternalValue() const { |
| return ticks_; |
| } |
| |
| TimeTicks& operator=(TimeTicks other) { |
| ticks_ = other.ticks_; |
| return *this; |
| } |
| |
| // Compute the difference between two times. |
| TimeDelta operator-(TimeTicks other) const { |
| return TimeDelta(ticks_ - other.ticks_); |
| } |
| |
| // Modify by some time delta. |
| TimeTicks& operator+=(TimeDelta delta) { |
| ticks_ += delta.delta_; |
| return *this; |
| } |
| TimeTicks& operator-=(TimeDelta delta) { |
| ticks_ -= delta.delta_; |
| return *this; |
| } |
| |
| // Return a new TimeTicks modified by some delta. |
| TimeTicks operator+(TimeDelta delta) const { |
| return TimeTicks(ticks_ + delta.delta_); |
| } |
| TimeTicks operator-(TimeDelta delta) const { |
| return TimeTicks(ticks_ - delta.delta_); |
| } |
| |
| // Comparison operators |
| bool operator==(TimeTicks other) const { |
| return ticks_ == other.ticks_; |
| } |
| bool operator!=(TimeTicks other) const { |
| return ticks_ != other.ticks_; |
| } |
| bool operator<(TimeTicks other) const { |
| return ticks_ < other.ticks_; |
| } |
| bool operator<=(TimeTicks other) const { |
| return ticks_ <= other.ticks_; |
| } |
| bool operator>(TimeTicks other) const { |
| return ticks_ > other.ticks_; |
| } |
| bool operator>=(TimeTicks other) const { |
| return ticks_ >= other.ticks_; |
| } |
| |
| protected: |
| friend class TimeDelta; |
| |
| // Please use Now() to create a new object. This is for internal use |
| // and testing. Ticks is in microseconds. |
| explicit TimeTicks(int64 ticks) : ticks_(ticks) { |
| } |
| |
| // Tick count in microseconds. |
| int64 ticks_; |
| |
| #if defined(OS_WIN) |
| typedef DWORD (*TickFunctionType)(void); |
| static TickFunctionType SetMockTickFunction(TickFunctionType ticker); |
| #endif |
| }; |
| |
| inline TimeTicks TimeDelta::operator+(TimeTicks t) const { |
| return TimeTicks(t.ticks_ + delta_); |
| } |
| |
| } // namespace base |
| |
| #endif // BASE_TIME_H_ |