-// 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.
-
-void Thread::main_loop() {
-
- while (true)
- {
- lock_grab(&sleepLock);
-
- do_sleep = true; // Always return to sleep after a search
-
- is_searching = false;
-
- while (do_sleep && !do_terminate)
- {
- cond_signal(&Threads.sleepCond); // Wake up UI thread if needed
- cond_wait(&sleepCond, &sleepLock);
- }
-
- is_searching = true;
-
- lock_release(&sleepLock);
-
- if (do_terminate)
- return;
-
- Search::think();
- }
-}
-
-
-// ThreadsManager::start_thinking() is used by UI thread to wake up the main
-// thread parked in main_loop() and starting a new search. If asyncMode is true
-// then function returns immediately, otherwise caller is blocked waiting for
-// the search to finish.
-
-void ThreadsManager::start_thinking(const Position& pos, const Search::LimitsType& limits,
- const std::vector<Move>& searchMoves, bool asyncMode) {
- Thread& main = threads[0];
-
- lock_grab(&main.sleepLock);
-
- // Wait main thread has finished before to launch a new search
- while (!main.do_sleep)
- cond_wait(&sleepCond, &main.sleepLock);
-
- // Copy input arguments to Search global variables
- Search::RootPosition.copy(pos, 0);
- Search::Limits = limits;
- Search::RootMoves = searchMoves;
-
- // Reset signals before to start the search
- memset((void*)&Search::Signals, 0, sizeof(Search::Signals));
-
- main.do_sleep = false;
- cond_signal(&main.sleepCond); // Wake up main thread
-
- if (!asyncMode)
- cond_wait(&sleepCond, &main.sleepLock);
-
- lock_release(&main.sleepLock);
-}
-
-
-// ThreadsManager::wait_for_stop_or_ponderhit() is called when the maximum depth
-// is reached while the program is pondering. The point is to work around a wrinkle
-// in the UCI protocol: When pondering, the engine is not allowed to give a
-// "bestmove" before the GUI sends it a "stop" or "ponderhit" command.
-// We simply wait here until one of these commands (that raise StopRequest) is
-// sent, and return, after which the bestmove and pondermove will be printed.