shithub: moonfish

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make small threading fix

--- a/search.c

+++ b/search.c

@@ -189,13 +189,16 @@

 	for (;;) {

 #ifdef moonfish_no_threads

-		if (node->count == 0) break;

+		if (node->count <= 0) break;

 #else

 		n = 0;

 		if (atomic_compare_exchange_strong(&node->count, &n, -1)) break;

 		if (n == -1) continue;

+		if (n == -2) break;

 #endif

+		if (moonfish_finished(chess)) node->count = -2;

+		

 		next = NULL;

 		max_confidence = -1;

@@ -293,13 +296,12 @@

 	for (i = 0 ; i < count ; i++) {

 		chess = *chess0;

 		leaf = moonfish_select(node, &chess);

-		if (moonfish_finished(&chess)) {

+		if (leaf->count == -2) {

 			leaf->score = 0;

 			moonfish_propagate(leaf);

 			if (moonfish_checkmate(&chess)) {

 				moonfish_propagate_bounds(leaf, 1);

 			}

-			leaf->count = 0;

 			continue;

 		}

 		moonfish_expand(leaf, &chess);

-- 

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