#ifndef TIMER_H
#define TIMER_H 1

// (c) 1999 Jeffrey D. Oldham.  ALL rights reserved.

// Oldham, Jeffrey D.
// 1999 Dec 11
// CS 1321
//
// Code to Print the Total Running of a Process

// To use this code,
// 1. Copy this file to the directory containing the rest of your code.
// 2. Add #include "timer.h" near the top of your code.
// 3. Add a call to the function timer(cout) at the end of your code.
//      You can use any other valid ostream (or ofstream).

#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>

// timer() prints the total running time of the program
// input <- output stream
// output-> none

void timer(ostream & out)
{
  struct rusage rusage;         // resource use structure
  if (getrusage(RUSAGE_SELF, &rusage)) {
    cerr << "getrusage() failed.\n";
  }
  else  {
    const long umsec = rusage.ru_utime.tv_sec * 1000 + rusage.ru_utime.tv_usec
/ 1000;
    const long smsec = rusage.ru_stime.tv_sec * 1000 + rusage.ru_stime.tv_usec
/ 1000;
    out << "c total time:\t" << umsec + smsec << " msec\n";
  }
  return;
}

#endif // TIMER_H