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#ifndef __seconds_h__
#define __seconds_h__ 1
#include <chrono>
#include <sys/resource.h>
namespace utils {
#ifdef _WIN32
#include <Windows.h>
#define getpid GetCurrentProcessId
inline double cpuTime() {
FILETIME a,b,c,d;
return GetProcessTimes(GetCurrentThread(),&a,&b,&c,&d) != 0 ?
(double) (d.dwLowDateTime |
((unsigned long long)d.dwHighDateTime << 32))*100.0 : 0.0;
}
#else
#include <unistd.h>
#include <time.h>
inline double cpuTime() {
#ifdef CLOCK_THREAD_CPUTIME_ID
#define GETTIME_ID CLOCK_THREAD_CPUTIME_ID
#elif defined(CLOCK_PROCESS_CPUTIME_ID)
#define GETTIME_ID CLOCK_PROCESS_CPUTIME_ID
#endif
#ifdef GETTIME_ID
timespec t;
clock_gettime(GETTIME_ID,&t);
return 1.0e9*t.tv_sec+t.tv_nsec;
#undef GETTIME_ID
#else
struct rusage ru;
if(getrusage(RUSAGE_SELF, &ru))
return 0;
return 1.0e9*(ru.ru_utime.tv_sec+ru.ru_stime.tv_sec)
+1.0e3*(ru.ru_utime.tv_usec+ru.ru_stime.tv_usec);
#endif
}
#endif
class stopWatch {
std::chrono::time_point<std::chrono::steady_clock> Start;
public:
void reset() {
Start=std::chrono::steady_clock::now();
}
stopWatch() {
reset();
}
double nanoseconds(bool reset=false) {
auto Stop=std::chrono::steady_clock::now();
double ns=std::chrono::duration_cast<std::chrono::nanoseconds>
(Stop-Start).count();
if(reset)
Start=Stop;
return ns;
}
double seconds(bool reset=false) {
return 1.0e-9*nanoseconds(reset);
}
};
class cpuTimer {
double start;
std::chrono::time_point<std::chrono::steady_clock> Start;
public:
void reset() {
start=cpuTime();
Start=std::chrono::steady_clock::now();
}
cpuTimer() {
reset();
}
double nanoseconds(bool reset=false) {
auto Stop=std::chrono::steady_clock::now();
double stop=cpuTime();
double ns=std::min((double) std::chrono::duration_cast<std::chrono::nanoseconds>
(Stop-Start).count(),stop-start);
if(reset) {
Start=Stop;
start=stop;
}
return ns;
}
double seconds(bool reset=false) {
return 1.0e-9*nanoseconds(reset);
}
};
}
#endif
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