From 4c986b050111e4fb96716a75ae2168c005b03df9 Mon Sep 17 00:00:00 2001
From: Joost VandeVondele <Joost.VandeVondele@gmail.com>
Date: Fri, 21 Jun 2019 16:24:28 +0200
Subject: [PATCH] Make the debug counters thread safe.

needed to use them in a threaded run.

No functional change.
---
 src/misc.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/misc.cpp b/src/misc.cpp
index 8d3b202d..b1539ce2 100644
--- a/src/misc.cpp
+++ b/src/misc.cpp
@@ -145,7 +145,7 @@ const string engine_info(bool to_uci) {
 
 
 /// Debug functions used mainly to collect run-time statistics
-static int64_t hits[2], means[2];
+static std::atomic<int64_t> hits[2], means[2];
 
 void dbg_hit_on(bool b) { ++hits[0]; if (b) ++hits[1]; }
 void dbg_hit_on(bool c, bool b) { if (c) dbg_hit_on(b); }
-- 
2.39.2