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  1. /*
  2.   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
  3.   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
  4.   Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
  5.   Copyright (C) 2015-2018 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
  6.  
  7.   Stockfish is free software: you can redistribute it and/or modify
  8.   it under the terms of the GNU General Public License as published by
  9.   the Free Software Foundation, either version 3 of the License, or
  10.   (at your option) any later version.
  11.  
  12.   Stockfish is distributed in the hope that it will be useful,
  13.   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15.   GNU General Public License for more details.
  16.  
  17.   You should have received a copy of the GNU General Public License
  18.   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19. */
  20.  
  21. #ifndef TIMEMAN_H_INCLUDED
  22. #define TIMEMAN_H_INCLUDED
  23.  
  24. #include "misc.h"
  25. #include "search.h"
  26. #include "thread.h"
  27.  
  28. /// The TimeManagement class computes the optimal time to think depending on
  29. /// the maximum available time, the game move number and other parameters.
  30.  
  31. class TimeManagement {
  32. public:
  33.   void init(Search::LimitsType& limits, Color us, int ply);
  34.   int optimum() const { return optimumTime; }
  35.   int maximum() const { return maximumTime; }
  36.   int elapsed() const { return int(Search::Limits.npmsec ? Threads.nodes_searched() : now() - startTime); }
  37.  
  38.   int64_t availableNodes; // When in 'nodes as time' mode
  39.  
  40. private:
  41.   TimePoint startTime;
  42.   int optimumTime;
  43.   int maximumTime;
  44. };
  45.  
  46. extern TimeManagement Time;
  47.  
  48. #endif // #ifndef TIMEMAN_H_INCLUDED
  49.