Line data    Source code

       1             : // Author(s): Maurice Laveaux
       2             : // Copyright: see the accompanying file COPYING or copy at
       3             : // https://github.com/mCRL2org/mCRL2/blob/master/COPYING
       4             : //
       5             : // Distributed under the Boost Software License, Version 1.0.
       6             : // (See accompanying file LICENSE_1_0.txt or copy at
       7             : // http://www.boost.org/LICENSE_1_0.txt)
       8             : //
       9             : 
      10             : #ifndef MCRL2_UTILITIES_STOPWATCH_H_
      11             : #define MCRL2_UTILITIES_STOPWATCH_H_
      12             : 
      13             : #include <chrono>
      14             : 
      15             : /// \brief Implements a simple stopwatch that starts on construction.
      16             : class stopwatch
      17             : {
      18             : public:
      19           5 :   stopwatch()
      20           5 :   {
      21           5 :     reset();
      22           5 :   }
      23             : 
      24             :   /// \brief Reset the stopwatch to count from this moment onwards.
      25          10 :   void reset()
      26             :   {
      27          10 :     m_timestamp = std::chrono::steady_clock::now();
      28          10 :   }
      29             : 
      30             :   /// \returns The time in milliseconds since the last reset.
      31           6 :   long long time()
      32             :   {
      33           6 :     return std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::steady_clock::now() - m_timestamp).count();
      34             :   }
      35             : 
      36             :   /// \returns The time in seconds since the last reset.
      37             :   double seconds()
      38             :   {
      39             :     return std::chrono::duration<double>(std::chrono::steady_clock::now() - m_timestamp).count();
      40             :   }
      41             : 
      42             : private:
      43             :   std::chrono::time_point<std::chrono::steady_clock> m_timestamp;
      44             : };
      45             : 
      46             : #endif // MCRL2_UTILITIES_STOPWATCH_H_