src.main/CScopedTiming.hh

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
/*
 * mitie
 * Copyright (C) Jason Spencer 2009 <mitie@jasonspencer.org>
 * 
 * mitie is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * mitie 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.
 * 
 * You should have received a copy of the GNU General Public License along
 * with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef _CSCOPEDTIMING_H_
#define _CSCOPEDTIMING_H_ 1

#ifdef _WIN32
#include <windows.h>
#else
#include <sys/time.h>
#endif

#include <iostream>
#include <string>

namespace jsplib {
class CScopedTiming {

private:
double & m_out;
#ifdef _WIN32
DWORD m_start;
#else
struct timeval m_start;
#endif

// prevent dynamic instantion so this class so it can only created on the stack
static void *operator new(size_t size);
static void operator delete(void *ptr);
static void *operator new[](size_t size);
static void operator delete[](void *ptr);
CScopedTiming( const CScopedTiming & ); // non-copyable
// TODO maybe make this copyable to be able to take split times? but then we need a new way to return values since it can't go into m_out

public:

CScopedTiming( double & out ):m_out(out) {
#ifdef _WIN32
        m_start = GetTickCount();
#else
        gettimeofday(&m_start,NULL);
#endif
        }
~CScopedTiming() {
#ifdef _WIN32
        m_out += ((double)(GetTickCount() - m_start))/1000.0;
#else
        struct timeval end, diff;
        gettimeofday(&end,NULL);
        timersub(&end,&m_start,&diff);
        m_out += (double)diff.tv_sec+((double)diff.tv_usec/1000000.0);
#endif
        }
};

} // namespace jsplib

#endif  // _CSCOPEDTIMING_H_