X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fposition.cpp;h=3a0f8b1c90f8bba670b942488b87966092cefd69;hp=62749a913b75cfaa5e317c43bd8879e7370009f6;hb=c2fc80e5d16339266b5bf6687fa843ff65de3b3e;hpb=e1919384a23fe728422f995369161efa192380db

diff --git a/src/position.cpp b/src/position.cpp
index 62749a91..3a0f8b1c 100644
--- a/src/position.cpp
+++ b/src/position.cpp
@@ -92,17 +92,19 @@ CheckInfo::CheckInfo(const Position& pos) {
 }
 
 
-/// Position::operator=() creates a copy of 'pos'. We want the new born Position
+/// Position::copy() creates a copy of 'pos'. We want the new born Position
 /// object do not depend on any external data so we detach state pointer from
 /// the source one.
 
-Position& Position::operator=(const Position& pos) {
+void Position::copy(const Position& pos, Thread* th) {
 
   memcpy(this, &pos, sizeof(Position));
   startState = *st;
   st = &startState;
+  thisThread = th;
   nodes = 0;
-  return *this;
+
+  assert(pos_is_ok());
 }
 
 
@@ -110,7 +112,7 @@ Position& Position::operator=(const Position& pos) {
 /// string. This function is not very robust - make sure that input FENs are
 /// correct (this is assumed to be the responsibility of the GUI).
 
-void Position::from_fen(const string& fenStr, bool isChess960) {
+void Position::from_fen(const string& fenStr, bool isChess960, Thread* th) {
 /*
    A FEN string defines a particular position using only the ASCII character set.
 
@@ -226,6 +228,7 @@ void Position::from_fen(const string& fenStr, bool isChess960) {
   st->npMaterial[BLACK] = compute_non_pawn_material(BLACK);
   st->checkersBB = attackers_to(king_square(sideToMove)) & pieces(~sideToMove);
   chess960 = isChess960;
+  thisThread = th;
 
   assert(pos_is_ok());
 }
@@ -328,7 +331,7 @@ void Position::print(Move move) const {
 
   if (move)
   {
-      Position p(*this);
+      Position p(*this, thisThread);
       cout << "\nMove is: " << (sideToMove == BLACK ? ".." : "") << move_to_san(p, move);
   }
 
@@ -895,8 +898,8 @@ void Position::do_move(Move m, StateInfo& newSt, const CheckInfo& ci, bool moveI
   }
 
   // Prefetch pawn and material hash tables
-  prefetch((char*)Threads.this_thread()->pawnTable.entries[st->pawnKey]);
-  prefetch((char*)Threads.this_thread()->materialTable.entries[st->materialKey]);
+  prefetch((char*)thisThread->pawnTable.entries[st->pawnKey]);
+  prefetch((char*)thisThread->materialTable.entries[st->materialKey]);
 
   // Update incremental scores
   st->psqScore += psq_delta(piece, from, to);
@@ -1538,9 +1541,10 @@ void Position::init() {
 void Position::flip() {
 
   // Make a copy of current position before to start changing
-  const Position pos(*this);
+  const Position pos(*this, thisThread);
 
   clear();
+  thisThread = pos.this_thread();
 
   // Board
   for (Square s = SQ_A1; s <= SQ_H8; s++)