From: Marco Costalba <mcostalba@gmail.com>
Date: Thu, 29 Mar 2012 19:04:27 +0000 (+0100)
Subject: Fix an hang when max depth is reached
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=5e18b81e870dd44dd8fadab1a4e428d79e6b09d9

Fix an hang when max depth is reached

In this case SF stop searching and goes sleeping
waiting for a stop / ponderhit before to return
best move. So when a "stop" arrives we need to wake
up the main thread again.

Another regression introduced by 3aa471f2a9cb,
hopefully the last one.

Thanks to Otello1984 to reporting this.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
---

diff --git a/src/thread.cpp b/src/thread.cpp
index 6a5454fa..6fefd58a 100644
--- a/src/thread.cpp
+++ b/src/thread.cpp
@@ -419,6 +419,7 @@ void ThreadsManager::wait_for_search_finished() {
 
   Thread* main = threads[0];
   lock_grab(main->sleepLock);
+  cond_signal(main->sleepCond); // In case is waiting for stop or ponderhit
   while (!main->do_sleep) cond_wait(sleepCond, main->sleepLock);
   lock_release(main->sleepLock);
 }