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// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
//
// Timer.h: Rcpp R/C++ interface class library -- simple timer class
//
// Copyright (C) 2010 Dirk Eddelbuettel and Romain Francois
//
// This file is part of Rcpp.
//
// Rcpp 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 2 of the License, or
// (at your option) any later version.
//
// Rcpp 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 Rcpp. If not, see <http://www.gnu.org/licenses/>.
// Simple timer class based on on ideas in atimer.h / atimer.cxx found a few years ago at
// http://www.cs.uiowa.edu/~sriram/30/fall03/
// and attributed to Amir Elaguizy while under GPL
// but converted to using gettimeofday/GetSystemTime instead
#ifndef TIMER_H
#define TIMER_H
class Timer {
public:
Timer() : sys_time("Sys.time") { Reset(); }
void Start() { start_t = getFractionalSeconds() ; }
void Stop() {
end_t = getFractionalSeconds();
elapsed = end_t - start_t; // Calculate elapsed time in seconds
cumul += elapsed;
}
void Reset() { end_t = start_t = elapsed = cumul = 0.0; }
double ElapsedTime() { return elapsed; }
double CumulativeTime() { return cumul; }
private:
Function sys_time ;
double start_t, end_t, elapsed, cumul;
double getFractionalSeconds(void) {
return as<double>( sys_time() ) ;
}
};
#endif
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