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Document why we use per-thread pawn and material tables

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Arisen from a discussion on talkchess.

No fnctional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2011-04-24 08:18:39 +01:00
parent fe213d30fa
commit 633c83f648
1 changed files with 3 additions and 1 deletions
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4
src/evaluate.cpp
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@@ -233,7 +233,9 @@ namespace {
}; };
// Pawn and material hash tables, indexed by the current thread id. // Pawn and material hash tables, indexed by the current thread id.
// Note that they will be initialized at 0 being global variables. // We use per-thread tables so that once we get a pointer to an entry
// its life time is unlimited and we don't have to care about someone
// changing the entry under our feet.
MaterialInfoTable* MaterialTable[MAX_THREADS]; MaterialInfoTable* MaterialTable[MAX_THREADS];
PawnInfoTable* PawnTable[MAX_THREADS]; PawnInfoTable* PawnTable[MAX_THREADS];