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#pragma once
#include <chrono>
namespace util
{
/**
* Helper class wrapping a std::chrono::steady_clock to measure
* time intervals in seconds.
* Use the getSecondsPassed() method to measure the time passed
* since the last call to restart(). If no call to restart() was
* made, it will return the time passed since construction.
*/
class StopWatch
{
private:
std::chrono::steady_clock _clock;
std::chrono::steady_clock::time_point _start;
public:
StopWatch()
{
restart();
}
// Restarts the timer, resetting the time passed to 0
void restart()
{
_start = _clock.now();
}
// Returns the seconds passed since the last call to restart()
// If restart() has never been called, this is the duration since construction
std::size_t getSecondsPassed() const
{
auto endTime = _clock.now();
auto seconds = std::chrono::duration_cast<std::chrono::seconds>(endTime - _start).count();
return static_cast<std::size_t>(seconds);
}
// Returns the milliseconds passed since the last call to restart()
// If restart() has never been called, this is the duration since construction
std::size_t getMilliSecondsPassed() const
{
auto endTime = _clock.now();
auto msecs = std::chrono::duration_cast<std::chrono::milliseconds>(endTime - _start).count();
return static_cast<std::size_t>(msecs);
}
};
}
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