// ThreadsManager::set_timer() is used to set the timer to trigger after msec
// milliseconds. If msec is 0 then timer is stopped.
static internal void set_timer(int msec)
{
ThreadHelper.lock_grab(timer.sleepLock);
timer.maxPly = msec;
ThreadHelper.cond_signal(timer.sleepCond); // Wake up and restart the timer
ThreadHelper.lock_release(timer.sleepLock);
}
// ThreadsManager::wait_for_search_finished() waits for main thread to go to
// sleep, this means search is finished. Then returns.
internal static void wait_for_search_finished()
{
Thread t = main_thread();
ThreadHelper.lock_grab(t.sleepLock);
ThreadHelper.cond_signal(t.sleepCond); // In case is waiting for stop or ponderhit
while (!t.do_sleep)
{
ThreadHelper.cond_wait(sleepCond, t.sleepLock);
}
ThreadHelper.lock_release(t.sleepLock);
}
// Thread::main_loop() is where the main thread is parked waiting to be started
// when there is a new search. Main thread will launch all the slave threads.
internal void main_loop(ManualResetEvent initEvent)
{
// Initialize the TT here
UInt32 ttSize = UInt32.Parse(OptionMap.Instance["Hash"].v);
if (TT.size != ttSize)
{
TT.set_size(ttSize);
}
// Signal done
initEvent.Set();
while (true)
{
ThreadHelper.lock_grab(sleepLock);
do_sleep = true; // Always return to sleep after a search
is_searching = false;
while (do_sleep && !do_exit)
{
ThreadHelper.cond_signal(Threads.sleepCond); // Wake up UI thread if needed
ThreadHelper.cond_wait(sleepCond, sleepLock);
}
ThreadHelper.lock_release(sleepLock);
if (do_exit)
{
return;
}
is_searching = true;
Search.think(); // This is the search entry point
}
}
internal void wake_up()
{
ThreadHelper.lock_grab(sleepLock);
ThreadHelper.cond_signal(sleepCond);
ThreadHelper.lock_release(sleepLock);
}