X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmisc.cpp;h=ababdbc1d7df8d4276e0de838a0ef34e5faf3071;hp=1a092c612fd2abc084acc27366d6644622c0d5d3;hb=92e759a676b5f2886160fc8f43744f137a0a19b1;hpb=3df2c01b5769c7ae996fb5b992c06e4a5428ad35

diff --git a/src/misc.cpp b/src/misc.cpp
index 1a092c61..ababdbc1 100644
--- a/src/misc.cpp
+++ b/src/misc.cpp
@@ -146,6 +146,23 @@ public:
 };
 
 
+/// Used to serialize access to std::cout to avoid multiple threads to write at
+/// the same time.
+
+std::ostream& operator<<(std::ostream& os, SyncCout sc) {
+
+  static Mutex m;
+
+  if (sc == io_lock)
+      m.lock();
+
+  if (sc == io_unlock)
+      m.unlock();
+
+  return os;
+}
+
+
 /// Trampoline helper to avoid moving Logger to misc.h
 void start_logger(bool b) { Logger::start(b); }