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Simplify finished search in ponder/infinite mode.

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In this rare case (e.g. go infinite on a stalemate),
just spin till ponderhit/stop comes.

The Thread::wait() is a renmant of the old YBWC
code, today with lazy SMP, threads don't need to
wait when outside of their idle loop.

No functional change.
This commit is contained in:
Joost VandeVondele
2017-08-04 19:48:07 +02:00
committed by Marco Costalba
parent 66c5eaebd8
commit 2783203428
4 changed files with 10 additions and 25 deletions
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src/search.cpp
+6 -6
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@@ -277,13 +277,13 @@ void MainThread::search() {
// the UCI protocol states that we shouldn't print the best move before the
// GUI sends a "stop" or "ponderhit" command. We therefore simply wait here
// until the GUI sends one of those commands (which also raises Threads.stop).
if (!Threads.stop && (Threads.ponder || Limits.infinite))
{
Threads.stopOnPonderhit = true;
wait(Threads.stop);
}
Threads.stopOnPonderhit = true;
// Stop the threads if not already stopped
while (!Threads.stop && (Threads.ponder || Limits.infinite))
{} // Busy wait for a stop or a ponder reset
// Stop the threads if not already stopped (also raise the stop if
// "ponderhit" just reset Threads.ponder).
Threads.stop = true;
// Wait until all threads have finished