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#ifndef _GRESUSAGE_
#define _GRESUSAGE_
#include "GBase.h"
#if defined _WIN32 && ! defined __CYGWIN__
#define RUSAGE_SELF 0 /* calling process */
#define RUSAGE_CHILDREN -1 /* terminated child processes */
#define RUSAGE_THREAD 1
struct rusage {
struct timeval ru_utime; /* user time used */
struct timeval ru_stime; /* system time used */
long ru_maxrss;
long ru_majflt;
};
#else
#include <sys/resource.h>
#endif
#include <time.h>
// report the memory usage of the current process in bytes
size_t getCurrentMemUse(); //current memory usage of the program (RSS)
size_t getPeakMemUse(); //maximum memory usage (RSS) for the program until now
void printMemUsage(FILE* fout=stderr); //in kilobytes
double get_usecTime();
class GResUsage {
protected:
bool started;
bool stopped;
size_t start_mem;
size_t stop_mem;
struct rusage start_ru;
struct rusage stop_ru;
struct timespec start_ts;
struct timespec stop_ts;
void stopCheck(const char* s);
public:
GResUsage(bool do_start=false):started(false),
stopped(false), start_mem(0), stop_mem(0) {
if (do_start) start();
}
double start(); //returns microseconds time using clock_gettime(CLOCK_MONOTONIC)
double stop(); //stop the stopwatch, returns the current time in microseconds
double elapsed(); //microseconds elapsed between start and stop (wallclock time)
double u_elapsed(); //microseconds of user time elapsed
double s_elapsed(); //microseconds of system time elapsed
double memoryUsed(); //memory increase between start and stop in KB (can be negative)
};
#endif
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