Fix a possible crash in thread_is_available()

[stockfish] / src / thread.h

diff --git a/src/thread.h b/src/thread.h
index d12ec845c01f4bc4a288bd6bfe076b8652ca9b5b..d0c1d8e9519edd6d7966f86cbdd9da6f4b5415d2 100644 (file)
--- a/src/thread.h
+++ b/src/thread.h
@@ -64,7 +64,7 @@ struct SplitPoint {
 
 struct Thread {
   SplitPoint *splitPoint;
-  int activeSplitPoints;
+  volatile int activeSplitPoints;
   uint64_t nodes;
   uint64_t betaCutOffs[2];
   bool failHighPly1;