HCha/Stockfish
1
0
Fork 0
mirror of https://github.com/HChaZZY/Stockfish.git synced 2025-12-27 04:26:24 +08:00
Code Issues Packages Projects Releases Wiki Activity

Remove per thread instances of Endgames. (#2056)

Browse Source 
Similar to PSQT we only need one instance of the Endgames resource. The current per thread copies are identical and read only(after initialization) so from a design point of view it doesn't make sense to have them.

Tested for no slowdown.
http://tests.stockfishchess.org/tests/view/5c94377a0ebc5925cfff43ca
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 17320 W: 3487 L: 3359 D: 10474

No functional change.
This commit is contained in:
mstembera
2019-05-15 01:41:58 -07:00
committed by Marco Costalba
parent 44c320a572
commit 4a7b8180ec
5 changed files with 37 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
src/endgame.h
View File

@@ -95,10 +95,12 @@ struct Endgame : public EndgameBase<T> {
/// base objects in two std::map. We use polymorphism to invoke the actual
/// endgame function by calling its virtual operator().
class Endgames {
namespace Endgames {
template<typename T> using Ptr = std::unique_ptr<EndgameBase<T>>;
template<typename T> using Map = std::map<Key, Ptr<T>>;
extern std::pair<Map<Value>, Map<ScaleFactor>> maps;
template<typename T>
Map<T>& map() {
@@ -113,35 +115,12 @@ class Endgames {
map<T>()[Position().set(code, BLACK, &st).material_key()] = Ptr<T>(new Endgame<E>(BLACK));
}
std::pair<Map<Value>, Map<ScaleFactor>> maps;
public:
Endgames() {
add<KPK>("KPK");
add<KNNK>("KNNK");
add<KBNK>("KBNK");
add<KRKP>("KRKP");
add<KRKB>("KRKB");
add<KRKN>("KRKN");
add<KQKP>("KQKP");
add<KQKR>("KQKR");
add<KNNKP>("KNNKP");
add<KNPK>("KNPK");
add<KNPKB>("KNPKB");
add<KRPKR>("KRPKR");
add<KRPKB>("KRPKB");
add<KBPKB>("KBPKB");
add<KBPKN>("KBPKN");
add<KBPPKB>("KBPPKB");
add<KRPPKRP>("KRPPKRP");
}
template<typename T>
const EndgameBase<T>* probe(Key key) {
return map<T>().count(key) ? map<T>()[key].get() : nullptr;
}
};
void init();
}
#endif // #ifndef ENDGAME_H_INCLUDED