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#include <unistd.h>
#include "Timer.hh"
#include <limits.h>
int Timer::start(){
// struct timezone tz;
if(running) return 0; // already running
running=1;
times(&tm); // set current time
gettimeofday(&tv,0);
return 1;
}
int Timer::stop(){
// timezone tz;
tms tmc; // current time
timeval tvc; // current realtime
if(!running) return 0; // already stopped
running=0;
// copy back current time
gettimeofday(&tvc,0);
times(&tmc);
treal += ((double)(tvc.tv_sec - tv.tv_sec) +
((double)(tvc.tv_usec - tv.tv_usec))/1000000.0L);
tuser += (double)(tmc.tms_utime-tm.tms_utime)/CLK_TCK;
tsystem += (double)(tmc.tms_stime-tm.tms_stime)/CLK_TCK;
return 1;
}
void Timer::elapsedTimeSeconds(double &system,double &user,double &real){
int wasrunning=running;
stop();
system=tsystem;
user=tuser;
real=treal;
if(wasrunning) start();
}
void Timer::print(char *preface,FILE *f){
double s,u,r;
elapsedTimeSeconds(s,u,r);
fprintf(f,"%s: SystemTime=%lfs\tUserTime=%lfs\tRealTime=%lfs\n",
preface,s,u,r);
}
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