109 lines
2.9 KiB
C++
109 lines
2.9 KiB
C++
#ifndef STAR_TIME_HPP
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#define STAR_TIME_HPP
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#include "StarThread.hpp"
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namespace Star {
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STAR_CLASS(Clock);
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STAR_CLASS(Timer);
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namespace Time {
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double timeSinceEpoch();
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int64_t millisecondsSinceEpoch();
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double monotonicTime();
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int64_t monotonicMilliseconds();
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// Pretty print a duration of time (In days, hours, minutes, seconds, and milliseconds)
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String printDuration(double time);
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// Pretty print a given date and time
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String printDateAndTime(int64_t epochTicks, String format = "<year>-<month>-<day> <hours>:<minutes>:<seconds>.<millis>");
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String printCurrentDateAndTime(String format = "<year>-<month>-<day> <hours>:<minutes>:<seconds>.<millis>");
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// Ticks since unix epoch
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int64_t epochTicks();
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// Epoch ticks per second, static throughout application lifetime.
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int64_t epochTickFrequency();
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// Ticks since unspecified time before program start
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int64_t monotonicTicks();
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// Monotonic ticks per second, static throughout application lifetime.
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int64_t monotonicTickFrequency();
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double ticksToSeconds(int64_t ticks, int64_t tickFrequency);
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int64_t ticksToMilliseconds(int64_t ticks, int64_t tickFrequency);
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int64_t secondsToTicks(double seconds, int64_t tickFrequency);
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int64_t millisecondsToTicks(int64_t milliseconds, int64_t tickFrequency);
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}
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// Keeps track of elapsed real time since a given moment. Guaranteed
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// monotonically increasing and thread safe.
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class Clock {
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public:
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explicit Clock(bool start = true);
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Clock(Clock const& clock);
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Clock& operator=(Clock const& clock);
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// Resets clock to 0 time
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void reset();
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void stop();
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void start();
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bool running() const;
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double time() const;
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int64_t milliseconds() const;
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// Override actual elapsed time with the given time.
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void setTime(double time);
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void setMilliseconds(int64_t millis);
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// Warp the clock backwards or forwards
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void adjustTime(double timeAdjustment);
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void adjustMilliseconds(int64_t millisAdjustment);
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private:
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void updateElapsed() const;
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mutable RecursiveMutex m_mutex;
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mutable int64_t m_elapsedTicks;
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mutable Maybe<int64_t> m_lastTicks;
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bool m_running;
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};
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// An instance of Clock that counts down a given amount of time
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class Timer : private Clock {
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public:
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static Timer withTime(double timeLeft, bool start = true);
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static Timer withMilliseconds(int64_t millis, bool start = true);
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// Constructs a stopped timer whose time is up.
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Timer();
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Timer(Timer const& timer);
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// Start the timer with the given time left.
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void restart(double timeLeft);
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void restartWithMilliseconds(int64_t millisecondsLeft);
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// Time remaining on the timer. If negative is true, will return negative
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// time values after the timer is up, if false it stops at zero.
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double timeLeft(bool negative = false) const;
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int64_t millisecondsLeft(bool negative = false) const;
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// Is the time remaining <= 0.0?
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bool timeUp() const;
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using Clock::stop;
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using Clock::start;
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using Clock::running;
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};
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}
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#endif
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