@BIF
public static EObject spawn_opt(EProc self, EObject tup) throws Pausable {
ETuple t;
EAtom m;
EAtom f;
ESeq a;
ESeq o;
if ((t = tup.testTuple()) == null
|| t.arity() != 4
|| (m = t.elm(1).testAtom()) == null
|| (f = t.elm(2).testAtom()) == null
|| (a = t.elm(3).testSeq()) == null
|| (o = t.elm(4).testSeq()) == null) throw ERT.badarg(tup);
boolean link = false;
boolean monitor = false;
EAtom priority = null;
for (; !o.isNil(); o = o.tail()) {
EObject val = o.head();
ETuple2 t2;
if (val == am_link) {
link = true;
} else if (val == am_monitor) {
monitor = true;
} else if ((t2 = ETuple2.cast(val)) != null) {
if (t2.elm(1) == am_priority) {
EAtom am = t2.elm(2).testAtom();
if (am != null) priority = am;
}
// ignore full_sweep_after and min_heap_size
}
}
EProc p2 = new EProc(self.group_leader(), m, f, a);
if (link) {
self.link_to(p2);
}
if (priority != null) {
// may throw badarg!
p2.process_flag(am_priority, priority);
}
ERef ref = null;
if (monitor) {
ref = ERT.getLocalNode().createRef();
if (!self.monitor(p2.self_handle(), p2.self_handle(), ref)) {
throw new InternalError("cannot monitor new process?");
// self.mbox_send(ETuple.make(ERT.am_DOWN, ref, p2.self_handle(), ERT.am_noproc));
}
}
ERT.run(p2);
if (monitor) {
return new ETuple2(p2.self_handle(), ref);
} else {
return p2.self_handle();
}
}
