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Timer class for C++
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#if __cplusplus > 199711L /// C++11 | |
#include <chrono> | |
class Timer { | |
public: | |
Timer() : beg_(clock_::now()) {} | |
void reset() { beg_ = clock_::now(); } | |
double elapsed() const { | |
return std::chrono::duration_cast<second_> (clock_::now() - beg_).count(); | |
} | |
private: | |
typedef std::chrono::high_resolution_clock clock_; | |
typedef std::chrono::duration<double, std::ratio<1> > second_; | |
std::chrono::time_point<clock_> beg_; | |
}; | |
#else /// C++ | |
#include <ctime> | |
class Timer { | |
public: | |
Timer() { clock_gettime(CLOCK_REALTIME, &beg_); } | |
void reset() { clock_gettime(CLOCK_REALTIME, &beg_); } | |
double elapsed() { | |
clock_gettime(CLOCK_REALTIME, &end_); | |
return end_.tv_sec - beg_.tv_sec + (end_.tv_nsec - beg_.tv_nsec) / 1e9; | |
} | |
private: | |
timespec beg_, end_; | |
}; | |
#endif | |
/** Example usage */ | |
#if 0 | |
#include <iostream> | |
int main() { | |
Timer tmr; | |
double t = tmr.elapsed(); | |
std::cout << t << std::endl; | |
tmr.reset(); | |
double t = tmr.elapsed(); | |
std::cout << t << std::endl; | |
return 0; | |
} | |
#endif |
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