timing.cpp

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#include <iostream>
#include <cassert>
#ifndef WIN32
#include <sys/time.h>
#endif
#include "compatibility.hh"
#include "timing.hh"

using namespace std;

extern bool gTimingSwitch;

#if 1
double mysecond()
{
        struct timeval tp;
        struct timezone tzp;
        int i;

        i = gettimeofday(&tp,&tzp);
        return ( (double) tp.tv_sec + (double) tp.tv_usec * 1.e-6 );
}

int     lIndex=0;
double  lStartTime[1024];
double  lEndTime[1024];

static void tab (int n, ostream& fout)
{
        fout << '\n';
        while (n--)     fout << '\t'; 
}

void startTiming (const char* msg)
{
    if (gTimingSwitch) {
        assert(lIndex < 1023);
        tab(lIndex, cerr); cerr << "start " << msg << endl;
        lStartTime[lIndex++] = mysecond();
    }
}

void endTiming (const char* msg)
{
    if (gTimingSwitch) {
        assert(lIndex>0);
        lEndTime[--lIndex] = mysecond();
        tab(lIndex, cerr); cerr << "end " << msg << " (duration : " << lEndTime[lIndex] - lStartTime[lIndex] << ")" << endl;
    }
}

#else

void startTiming (const char* msg)
{}

void endTiming (const char* msg)
{}

#endif