stopwatch.h

00001 /*
00002  * Orca-Robotics Project: Components for robotics 
00003  *               http://orca-robotics.sf.net/
00004  * Copyright (c) 2004-2009 Alex Brooks, Alexei Makarenko, Tobias Kaupp
00005  *
00006  * This distribution is licensed to you under the terms described in
00007  * the LICENSE file included in this distribution.
00008  *
00009  */
00010 #ifndef HYDROUTIL_STOPWATCH_H
00011 #define HYDROUTIL_STOPWATCH_H
00012 
00013 #include <sys/time.h>
00014 
00015 namespace hydroutil {
00016 
00029 class Stopwatch
00030 {
00031 
00032 public: 
00033 
00034     virtual ~Stopwatch() {};
00035 
00036     void start();
00037     void stop();
00038     void startWithoutReset();
00039     
00040     double elapsedSeconds() const;
00041     double elapsedMs() const { return elapsedSeconds()*1000.0; }
00042     void reset();
00043 
00044 protected:
00045 
00046     // Overload this according to the type of time we're measuring.
00047     virtual void getTimeNow( struct timeval &now ) const=0;
00048 
00049 private: 
00050 
00051     bool   isRunning_;
00052 
00053     timeval elapsed_;
00054     timeval startTime_;
00055 
00056     // Call this only when the clock's ticking.
00057     void addTimeThisRun( timeval &accumulator ) const;
00058 };
00059 
00060 }
00061 
00062 #endif