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utimer.cpp
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utimer.cpp
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#include <iostream>
#include <chrono>
#include <thread>
#define START(timename) auto timename = std::chrono::system_clock::now();
#define STOP(timename,elapsed) auto elapsed = std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::system_clock::now() - timename).count();
class utimer {
std::chrono::system_clock::time_point start;
std::chrono::system_clock::time_point stop;
std::string message;
using usecs = std::chrono::microseconds;
using msecs = std::chrono::milliseconds;
private:
long * us_elapsed;
public:
utimer(const std::string m) : message(m),us_elapsed((long *)NULL) {
start = std::chrono::system_clock::now();
}
utimer(const std::string m, long * us) : message(m),us_elapsed(us) {
start = std::chrono::system_clock::now();
}
~utimer() {
stop =
std::chrono::system_clock::now();
std::chrono::duration<double> elapsed =
stop - start;
auto musec =
std::chrono::duration_cast<std::chrono::microseconds>(elapsed).count();
std::cout << message << " computed in " << musec << " usec "
<< std::endl;
if(us_elapsed != NULL)
(*us_elapsed) = musec;
}
};