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//-----------------------------------------------------------------------------
/** @file libboardgame_base/Timer.h
@author Markus Enzenberger
@copyright GNU General Public License version 3 or later */
//-----------------------------------------------------------------------------
#ifndef LIBBOARDGAME_BASE_TIMER_H
#define LIBBOARDGAME_BASE_TIMER_H
namespace libboardgame_base {
class TimeSource;
//-----------------------------------------------------------------------------
class Timer
{
public:
/** Constructor without time source.
If constructed without time source, the timer cannot be used before
reset(TimeSource&) was called. */
Timer() {
#ifdef LIBBOARDGAME_DEBUG
m_time_source = nullptr;
#endif
}
/** Constructor with time_source.
@param time_source The time source. The lifetime of this
parameter must exceed the lifetime of the class instance. */
explicit Timer(TimeSource& time_source) { reset(time_source); }
/** Get time since construction or last reset */
double operator()() const;
/** Reset timer. */
void reset();
/** Set time source and reset timer.
@param time_source The time source. The lifetime of this
parameter must exceed the lifetime of the class instance. */
void reset(TimeSource& time_source);
private:
double m_start;
TimeSource* m_time_source;
};
//-----------------------------------------------------------------------------
} // namespace libboardgame_base
#endif // LIBBOARDGAME_BASE_TIMER_H
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