X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmaterial.h;h=4ebd78fd5bb033ddb80063db3bced3e93b82114e;hp=7d5c3ce1e3f5c215fe27d660ea011e816addff2a;hb=35bd334b3044bc52ccbc3a8d653097c0f94bf67a;hpb=bb751d6c890f5c50c642366d601740366cfae8d0

diff --git a/src/material.h b/src/material.h
index 7d5c3ce1..4ebd78fd 100644
--- a/src/material.h
+++ b/src/material.h
@@ -1,13 +1,14 @@
 /*
-  Glaurung, a UCI chess playing engine.
-  Copyright (C) 2004-2008 Tord Romstad
+  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
+  Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
+  Copyright (C) 2008 Marco Costalba
 
-  Glaurung is free software: you can redistribute it and/or modify
+  Stockfish 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 3 of the License, or
   (at your option) any later version.
   
-  Glaurung is distributed in the hope that it will be useful,
+  Stockfish 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.
@@ -34,7 +35,7 @@
 ////
 
 /// MaterialInfo is a class which contains various information about a
-/// material configuration.  It contains a material balance evaluation,
+/// material configuration. It contains a material balance evaluation,
 /// a function pointer to a special endgame evaluation function (which in
 /// most cases is NULL, meaning that the standard evaluation function will
 /// be used), and "scale factors" for black and white.
@@ -50,11 +51,9 @@ class MaterialInfo {
 public:
   Value mg_value() const;
   Value eg_value() const;
-  ScaleFactor scale_factor(const Position &pos, Color c) const;
+  ScaleFactor scale_factor(const Position& pos, Color c) const;
   bool specialized_eval_exists() const;
-  Value evaluate(const Position &pos) const;
-
-  static void init();
+  Value evaluate(const Position& pos) const;
 
 private:
   void clear();
@@ -63,14 +62,22 @@ private:
   int16_t mgValue;
   int16_t egValue;
   uint8_t factor[2];
-  EndgameEvaluationFunction *evaluationFunction;
-  ScalingFunction *scalingFunction[2];
+  EndgameEvaluationFunction* evaluationFunction;
+  ScalingFunction* scalingFunction[2];
 };
 
 
-/// The MaterialInfoTable class represents a pawn hash table.  It is basically
+/// EndgameFunctions class stores the endgame evaluation functions std::map.
+/// Because STL library is not thread safe even for read access, the maps,
+/// although with identical content, are replicated for each thread. This
+/// is faster then using locks with an unique set of global maps.
+
+class EndgameFunctions;
+
+
+/// The MaterialInfoTable class represents a pawn hash table. It is basically
 /// just an array of MaterialInfo objects and a few methods for accessing these
-/// objects.  The most important method is get_material_info, which looks up a
+/// objects. The most important method is get_material_info, which looks up a
 /// position in the table and returns a pointer to a MaterialInfo object.
 
 class MaterialInfoTable {
@@ -79,11 +86,12 @@ public:
   MaterialInfoTable(unsigned numOfEntries);
   ~MaterialInfoTable();
   void clear();
-  MaterialInfo *get_material_info(const Position &pos);
+  MaterialInfo* get_material_info(const Position& pos);
 
 private:
   unsigned size;
-  MaterialInfo *entries;
+  MaterialInfo* entries;
+  EndgameFunctions* funcs;
 };
 
 
@@ -95,10 +103,12 @@ private:
 /// material balance evaluation for the middle game and the endgame.
 
 inline Value MaterialInfo::mg_value() const {
+
   return Value(mgValue);
 }
 
 inline Value MaterialInfo::eg_value() const {
+
   return Value(egValue);
 }
 
@@ -107,6 +117,7 @@ inline Value MaterialInfo::eg_value() const {
 /// with all slots at their default values.
 
 inline void MaterialInfo::clear() {
+
   mgValue = egValue = 0;
   factor[WHITE] = factor[BLACK] = uint8_t(SCALE_FACTOR_NORMAL);
   evaluationFunction = NULL;
@@ -117,16 +128,17 @@ inline void MaterialInfo::clear() {
 /// MaterialInfo::scale_factor takes a position and a color as input, and
 /// returns a scale factor for the given color.  We have to provide the
 /// position in addition to the color, because the scale factor need not
-/// be a constant:  It can also be a function which should be applied to
-/// the position.  For instance, in KBP vs K endgames, a scaling function
+/// to be a constant: It can also be a function which should be applied to
+/// the position. For instance, in KBP vs K endgames, a scaling function
 /// which checks for draws with rook pawns and wrong-colored bishops.
 
-inline ScaleFactor MaterialInfo::scale_factor(const Position &pos, Color c)
-  const {
-  if(scalingFunction[c] != NULL) {
-    ScaleFactor sf = scalingFunction[c]->apply(pos);
-    if(sf != SCALE_FACTOR_NONE)
-      return sf;
+inline ScaleFactor MaterialInfo::scale_factor(const Position& pos, Color c) const {
+
+  if (scalingFunction[c] != NULL)
+  {
+      ScaleFactor sf = scalingFunction[c]->apply(pos);
+      if (sf != SCALE_FACTOR_NONE)
+          return sf;
   }
   return ScaleFactor(factor[c]);
 }
@@ -137,15 +149,17 @@ inline ScaleFactor MaterialInfo::scale_factor(const Position &pos, Color c)
 /// or if the normal evaluation function should be used.
 
 inline bool MaterialInfo::specialized_eval_exists() const {
+
   return evaluationFunction != NULL;
 }
 
 
-/// MaterialInfo::evaluate applies a specialized evaluation function to a
-/// given position object.  It should only be called when
-/// this->specialized_eval_exists() returns 'true'.
+/// MaterialInfo::evaluate applies a specialized evaluation function
+/// to a given position object.  It should only be called when
+/// specialized_eval_exists() returns 'true'.
+
+inline Value MaterialInfo::evaluate(const Position& pos) const {
 
-inline Value MaterialInfo::evaluate(const Position &pos) const {
   return evaluationFunction->apply(pos);
 }