X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=c5c5b94470fed9365831fea28427db4d4070d0e5;hp=19ebc5e6eeeb79ef8ce12a3835372b1581edae95;hb=d165d5af914c3c925fb7ba53fbd63dfb2de92f5d;hpb=3ce43c20dee3d0c7afc4ff3b4c67e0530ab2138f

diff --git a/src/search.cpp b/src/search.cpp
index 19ebc5e6..c5c5b944 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1622,7 +1622,7 @@ void Thread::idle_loop() {
 
   // Pointer 'this_sp' is not null only if we are called from split(), and not
   // at the thread creation. So it means we are the split point's master.
-  const SplitPoint* this_sp = splitPointsSize ? activeSplitPoint : NULL;
+  SplitPoint* this_sp = splitPointsSize ? activeSplitPoint : NULL;
 
   assert(!this_sp || (this_sp->masterThread == this && searching));
 
@@ -1630,6 +1630,9 @@ void Thread::idle_loop() {
   // their work at this split point, return from the idle loop.
   while (!this_sp || this_sp->slavesMask)
   {
+      if (this_sp)
+          this_sp->mutex.unlock();
+
       // If we are not searching, wait for a condition to be signaled instead of
       // wasting CPU time polling for work.
       while ((!searching && Threads.sleepWhileIdle) || exit)
@@ -1721,6 +1724,9 @@ void Thread::idle_loop() {
           // unsafe because if we are exiting there is a chance are already freed.
           sp->mutex.unlock();
       }
+
+      if(this_sp)
+          this_sp->mutex.lock();
   }
 }