stopwatch.h

Go to the documentation of this file.

// OSB library ************************************************ -*- C++ -*-
/*
  AUTHOR(S): Stephan Broennimann (vb)

  RCS information
   $Name: OSB_060808 $
   $Revision: 1.7 $

  License
   OSB rating and billing library for communication networks
   Copyright (C) 2004, 2005, 2006  OSB systems

   This file may be distributed and/or modify under the terms of the
   GNU General Public License (GPL) as published by the Free Software
   Foundation which is provided in the file LICENSE.GPL included in the
   packaging of this file.

   The file is distributed in the hope that it will be useful, but WITHOUT
   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   for more details.

   Holders of a OSB Commercial License may use this file under the terms
   and conditions of this commercial license.
 */
#ifndef _STOPWATCH_H_
#define _STOPWATCH_H_

// ************************************************************************
// included header files
// + standard includes
#include <sys/times.h>
#include <errno.h>

// + libraries

// + local headers
#include "osberror.h"

// + class declarations

// ************************************************************************
// namespace extensions
namespace OSB_LIB {

// ************************************************************************
// forward declarations

// ************************************************************************
// type definitions

// ************************************************************************
// class definitions

    class Stopwatch {
    public:
        Stopwatch();
    public:
        struct Interval {
            Interval()
              : count_(0), real_(0.0),
                sys_(0.0), user_(0.0), csys_(0.0), cuser_(0.0)
            {
                // empty
            }
            long count_;
            double real_;
            double sys_;
            double user_;
            double csys_;
            double cuser_;
        };

        void start();
        void stop();
        void reset();
        void read(Interval*) const;

    private:
        struct Sws {
            Sws()
              : rtime_(0), stime_(0), utime_(0), cstime_(0), cutime_(0)
            {
                // empty
            }
            clock_t rtime_;
            clock_t stime_;
            clock_t utime_;
            clock_t cstime_;
            clock_t cutime_;
        };

        long cnt_;
        Sws accu_;
        Sws run_;
        struct tms tbuf_;
        static clock_t clk_tck_;
    };                                  // class Stopwatch
}                                       // namespace OSB_LIB

// ************************************************************************
// inline definitions
namespace OSB_LIB {
    inline void Stopwatch::start()
    {
        if (-1 == (run_.rtime_ = times(&tbuf_))) {
            throw DefException(54) << "times" << errno;
        }
        run_.stime_  = tbuf_.tms_stime;
        run_.utime_  = tbuf_.tms_utime;
        run_.cstime_ = tbuf_.tms_cstime;
        run_.cutime_ = tbuf_.tms_cutime;
    }                                   // Stopwatch::start()

    inline void Stopwatch::stop()
    {
        clock_t rtime;
        if (-1 == (rtime = times(&tbuf_))) {
            throw DefException(54) << "times" << errno;
        }
        cnt_         += 1;
        accu_.rtime_  += rtime            - run_.rtime_;
        accu_.stime_  += tbuf_.tms_stime  - run_.stime_;
        accu_.utime_  += tbuf_.tms_utime  - run_.utime_;
        accu_.cstime_ += tbuf_.tms_cstime - run_.cstime_;
        accu_.cutime_ += tbuf_.tms_cutime - run_.cutime_;
    }                                   // Stopwatch::stop()
}                                       // namespace OSB_LIB
#endif                                  // #ifndef _STOPWATCH_H_

---