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Fix broken UCI 'wait for stop'

Browse source 
When we reach the maximum depth, we can finish the
search without a raise of Signals.stop. However, if
we are pondering or in an infinite search, the UCI
protocol states that we shouldn't print the best move
before the GUI sends a "stop" or "ponderhit" command.

It was broken by lazy smp. Fix it by moving the stopping
of the threads after waiting for GUI.

No functional change.
This commit is contained in:
Marco Costalba 2015-11-09 09:50:02 +01:00
parent fca8dbc029
commit ce84ab6e9d
1 changed files with 8 additions and 8 deletions
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16
src/search.cpp
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@ -300,14 +300,6 @@ void MainThread::think() {
} }
search(true); // Let's start searching! search(true); // Let's start searching!
// Stop the threads
Signals.stop = true;
// Wait until all threads have finished
for (Thread* th : Threads)
if (th != this)
th->wait_while(th->searching);
} }
// When playing in 'nodes as time' mode, subtract the searched nodes from // When playing in 'nodes as time' mode, subtract the searched nodes from
@ -326,6 +318,14 @@ void MainThread::think() {
wait(Signals.stop); wait(Signals.stop);
} }
// Stop the threads if not already stopped
Signals.stop = true;
// Wait until all threads have finished
for (Thread* th : Threads)
if (th != this)
th->wait_while(th->searching);
// Check if there are threads with a better score than main thread. // Check if there are threads with a better score than main thread.
Thread* bestThread = this; Thread* bestThread = this;
for (Thread* th : Threads) for (Thread* th : Threads)