/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
- Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
+ Copyright (C) 2008-2012 Marco Costalba, Joona Kiiski, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
void ThreadsManager::read_uci_options() {
- maxThreadsPerSplitPoint = Options["Max Threads per Split Point"].value<int>();
- minimumSplitDepth = Options["Min Split Depth"].value<int>() * ONE_PLY;
- useSleepingThreads = Options["Use Sleeping Threads"].value<bool>();
+ maxThreadsPerSplitPoint = Options["Max Threads per Split Point"];
+ minimumSplitDepth = Options["Min Split Depth"] * ONE_PLY;
+ useSleepingThreads = Options["Use Sleeping Threads"];
- set_size(Options["Threads"].value<int>());
+ set_size(Options["Threads"]);
}
for (int i = 0; i <= MAX_THREADS; i++)
{
threads[i].is_searching = false;
- threads[i].do_sleep = true;
+ threads[i].do_sleep = (i != 0); // Avoid a race with start_thinking()
threads[i].threadID = i;
#if defined(_MSC_VER)
- threads[i].handle = CreateThread(NULL, 0, start_routine, (LPVOID)&threads[i], 0, NULL);
+ threads[i].handle = CreateThread(NULL, 0, start_routine, &threads[i], 0, NULL);
bool ok = (threads[i].handle != NULL);
#else
- bool ok = !pthread_create(&threads[i].handle, NULL, start_routine, (void*)&threads[i]);
+ bool ok = !pthread_create(&threads[i].handle, NULL, start_routine, &threads[i]);
#endif
if (!ok)
for (int i = 0; i <= MAX_THREADS; i++)
{
- threads[i].do_terminate = true;
+ threads[i].do_terminate = true; // Search must be already finished
threads[i].wake_up();
// Wait for thread termination
#if defined(_MSC_VER)
- WaitForSingleObject(threads[i].handle, 0);
+ WaitForSingleObject(threads[i].handle, INFINITE);
CloseHandle(threads[i].handle);
#else
pthread_join(threads[i].handle, NULL);
// Thread::timer_loop() is where the timer thread waits maxPly milliseconds and
// then calls do_timer_event(). If maxPly is 0 thread sleeps until is woken up.
-extern void do_timer_event();
+extern void check_time();
void Thread::timer_loop() {
lock_grab(&sleepLock);
timed_wait(&sleepCond, &sleepLock, maxPly ? maxPly : INT_MAX);
lock_release(&sleepLock);
- do_timer_event();
+ check_time();
}
}
cond_signal(&main.sleepCond); // Wake up main thread and start searching
if (!asyncMode)
+ while (!main.do_sleep)
+ cond_wait(&sleepCond, &main.sleepLock);
+
+ lock_release(&main.sleepLock);
+}
+
+
+// ThreadsManager::stop_thinking() is used by UI thread to raise a stop request
+// and to wait for the main thread finishing the search. Needed to wait exiting
+// and terminate the threads after a 'quit' command.
+
+void ThreadsManager::stop_thinking() {
+
+ Thread& main = threads[0];
+
+ Search::Signals.stop = true;
+
+ 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);