namespace { extern "C" {
// start_routine() is the C function which is called when a new thread
- // is launched. It simply calls idle_loop() of the supplied thread. The first
- // and last thread are special. First one is the main search thread while the
- // last one mimics a timer, they run in main_loop() and timer_loop().
+ // is launched. It is a wrapper to member function pointed by start_fn
- long start_routine(Thread* th) {
-
- if (th->threadID == 0)
- th->main_loop();
-
- else if (th->threadID == MAX_THREADS)
- th->timer_loop();
-
- else
- th->idle_loop(NULL);
-
- return 0;
- }
+ long start_routine(Thread* th) { (th->*(th->start_fn))(); return 0; }
} }
-// Thread c'tor creates and launches the OS thread, that will go immediately to
-// sleep.
+// Thread c'tor starts a newly-created thread of execution that will call
+// the idle loop function pointed by start_fn going immediately to sleep.
-Thread::Thread(int id) {
+Thread::Thread(Fn fn) {
is_searching = do_exit = false;
maxPly = splitPointsCnt = 0;
curSplitPoint = NULL;
- threadID = id;
- do_sleep = (id != 0); // Avoid a race with start_thinking()
+ start_fn = fn;
+ threadID = Threads.size();
+ do_sleep = (threadID != 0); // Avoid a race with start_thinking()
lock_init(sleepLock);
cond_init(sleepCond);
if (!thread_create(handle, start_routine, this))
{
- std::cerr << "Failed to create thread number " << id << std::endl;
+ std::cerr << "Failed to create thread number " << threadID << std::endl;
::exit(EXIT_FAILURE);
}
}
useSleepingThreads = Options["Use Sleeping Threads"];
int requested = Options["Threads"];
+ assert(requested > 0);
+
while (size() < requested)
- threads.push_back(new Thread(size()));
+ threads.push_back(new Thread(&Thread::idle_loop));
while (size() > requested)
{
cond_init(sleepCond);
lock_init(splitLock);
- timer = new Thread(MAX_THREADS);
- read_uci_options(); // Creates at least the main thread
+ timer = new Thread(&Thread::timer_loop);
+ threads.push_back(new Thread(&Thread::main_loop));
+ read_uci_options();
}