#include <stdio.h></stdio.h>

#include <stdlib.h></stdlib.h>

#include <sys times.h=""></sys>

#include <sys types.h=""></sys>

#include <unistd.h></unistd.h>

#include "pstats.h"

static struct tms tms_beg;

static struct tms tms_end;

static int has_times = 0;

void pstats_init(void)

{

    has_times = times(&tms_beg) != -1;

}

static void tms_report(void)

{

    double cputime;

    if (! has_times )

        return;

    times(&tms_end);

    cputime = ( ((float)tms_end.tms_utime + tms_end.tms_stime + tms_end.tms_cutime + tms_end.tms_cstime ) -

                ((float)tms_beg.tms_utime + tms_beg.tms_stime + tms_beg.tms_cutime + tms_beg.tms_cstime ) )

               / sysconf(_SC_CLK_TCK);

    fprintf(stderr,"\tcputime=%.3f\n" , cputime);

}

static void ps_report(void)

{

    char buf[1024];

#ifdef __APPLE__ /*  MAC OS X */

    sprintf(buf,"ps -o command,majflt,minflt,rss,pagein,vsz -p %d 1>&2",getpid() );

#else /* GNU/Linux */

    sprintf(buf,"ps -o comm,majflt,minflt,rss,drs,pagein,sz,trs,vsz %d 1>&2",getpid() );

#endif    

    if (system( buf )==-1) {

        perror("system call to ps failed");

    }

}

void pstats_report()

{

    ps_report();

    tms_report();

}