topical media & game development
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lib-of-vs-libs-Poco-include-Poco-Stopwatch.h / h



  //
  // Stopwatch.h
  //
  // Id: //poco/1.3/Foundation/include/Poco/Stopwatch.h#2 
  //
  // Library: Foundation
  // Package: DateTime
  // Module:  Stopwatch
  //
  // Definition of the Stopwatch class.
  //
  // Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
  // and Contributors.
  //
  // Permission is hereby granted, free of charge, to any person or organization
  // obtaining a copy of the software and accompanying documentation covered by
  // this license (the "Software") to use, reproduce, display, distribute,
  // execute, and transmit the Software, and to prepare derivative works of the
  // Software, and to permit third-parties to whom the Software is furnished to
  // do so, all subject to the following:
  // 
  // The copyright notices in the Software and this entire statement, including
  // the above license grant, this restriction and the following disclaimer,
  // must be included in all copies of the Software, in whole or in part, and
  // all derivative works of the Software, unless such copies or derivative
  // works are solely in the form of machine-executable object code generated by
  // a source language processor.
  // 
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
  // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
  // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
  // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  // DEALINGS IN THE SOFTWARE.
  //
  
  ifndef Foundation_Stopwatch_INCLUDED
  define Foundation_Stopwatch_INCLUDED
  
  include "Poco/Foundation.h"
  include "Poco/Timestamp.h"
  
  namespace Poco {
  
  class Foundation_API Stopwatch
A simple facility to measure time intervals with microsecond resolution. { public: Stopwatch(); ~Stopwatch(); 

          void start();
Starts (or restarts) the stopwatch. void stop(); Stops or pauses the stopwatch. void reset(); Resets the stopwatch. void restart(); Resets and starts the stopwatch. Timestamp::TimeDiff elapsed() const; Returns the elapsed time in microseconds since the stopwatch started. int elapsedSeconds() const; Returns the number of seconds elapsed since the stopwatch started. 

          static Timestamp::TimeVal resolution();
Returns the resolution of the stopwatch. 

  private:
          Stopwatch(const Stopwatch&);
          Stopwatch& operator = (const Stopwatch&);
  
          Timestamp           _start;
          Timestamp::TimeDiff _elapsed;
          bool                _running;
  };
  
  //
  // inlines
  //
  inline void Stopwatch::start()
  {
          if (!_running)
          {
                  _start.update();
                  _running = true;
          }
  }
  
  inline void Stopwatch::stop()
  {
          if (_running)
          {
                  Timestamp current;
                  _elapsed += current - _start;
                  _running = false;
          }
  }
  
  inline int Stopwatch::elapsedSeconds() const
  {
          return int(elapsed()/resolution());
  }
  
  inline Timestamp::TimeVal Stopwatch::resolution()
  {
          return Timestamp::resolution();
  }
  
  } // namespace Poco
  
  endif // Foundation_Stopwatch_INCLUDED
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 04/09/2009

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