@BIF
public static EObject keysearch(EObject k, EObject n, EObject list) {
ESmall idx = n.testSmall();
ESeq src = list.testSeq();
if (k == null || idx == null || src == null || idx.value < 1) throw ERT.badarg(k, n, list);
int index = idx.value;
while (!src.isNil()) {
EObject elm = src.head();
ETuple tup;
if ((tup = elm.testTuple()) != null) {
if (tup.arity() >= index) {
if (tup.elm(index).equals(k)) {
return new ETuple2(ERT.am_value, tup);
}
}
}
src = src.tail();
}
return ERT.FALSE;
}
public static EObject demonitor(ETask<?> self, EObject ref, EObject options) throws Pausable {
ERef r = ref.testReference();
ESeq o = options.testSeq();
if (r == null || o == null) throw ERT.badarg(ref, options);
boolean flush = (!o.isNil() && o.head() == am_flush);
EObject found = self.demonitor(r);
if (found == null) {
return ERT.FALSE;
}
EHandle h;
ETuple tup;
EAtom name;
EAtom node;
if ((h = found.testHandle()) != null) {
h.remove_monitor(self.self_handle(), r, flush);
} else if ((tup = found.testTuple()) != null
&& tup.arity() == 2
&& (name = tup.elm(1).testAtom()) != null
&& (node = tup.elm(2).testAtom()) != null) {
EAbstractNode n = EAbstractNode.get_or_connect(self, node);
if (n != null) {
n.dsig_demonitor(self.self_handle(), r, name);
}
}
if (flush && (self instanceof EProc)) {
flush_monitor_message.invoke((EProc) self, new EObject[] {ref, ERT.am_ok});
}
return ERT.TRUE;
}
@BIF
static EPort open_port(EProc proc, EObject portName, EObject portSetting) {
ETuple t;
if ((t = portName.testTuple()) == null) throw ERT.badarg(portName, portSetting);
ETuple2 name;
if ((name = ETuple2.cast(t)) == null) throw ERT.badarg(portName, portSetting);
if (name.elem1 == am_spawn) {
throw new ErlangError(ERT.AM_NOT_IMPLEMENTED, portName, portSetting);
} else if (name.elem1 == am_spawn_driver) {
throw new NotImplemented();
} else if (name.elem1 == am_spawn_executable) {
ETask<? extends EPort> task = new EExecDriverTask(proc, name, portSetting);
return task.self();
}
throw ERT.badarg(portName, portSetting);
}
@BIF
public static EObject keyfind(EObject key, EObject nth_arg, EObject list_arg) {
ESmall nth = nth_arg.testSmall();
ESeq list = list_arg.testSeq();
if (key == null || nth == null | list == null) throw ERT.badarg(key, nth_arg, list_arg);
while (!list.isNil()) {
EObject elm = list.head();
ETuple tup = elm.testTuple();
// test that it is a tuple of the right size
if (tup != null && tup.arity() >= nth.value) {
EObject val = tup.elm(nth.value);
if (val.equals(key)) {
return tup;
}
}
list = list.tail();
}
return ERT.FALSE;
}
@BIF
public static EObject monitor(EProc self, EObject how, EObject object) throws Pausable {
if (how != am_process) throw ERT.badarg(how, object);
// case 1: object is a PID
EHandle h = EHandle.cast(object);
if (h != null) {
ERef ref = ERT.getLocalNode().createRef();
if (!self.monitor(h, h, ref)) {
self.mbox_send(ETuple.make(ERT.am_DOWN, ref, am_process, object, ERT.am_noproc));
}
return ref;
}
// case 2: object is a name
EAtom name;
if (h == null && (name = object.testAtom()) != null) {
ERef ref = ERT.getLocalNode().createRef();
boolean success = false;
object = new ETuple2(name, ErlDist.node());
if ((h = ERT.whereis(name).testHandle()) != null) {
success = self.monitor(h, object, ref);
}
if (!success) {
self.mbox_send(ETuple.make(ERT.am_DOWN, ref, am_process, object, ERT.am_noproc));
}
return ref;
}
// case 3: object is {name, node}
ETuple tup;
EAtom node;
if ((tup = object.testTuple()) != null
&& tup.arity() == 2
&& (name = tup.elm(1).testAtom()) != null
&& (node = tup.elm(2).testAtom()) != null) {
if (node == ErlDist.node()) {
ERef ref = ERT.getLocalNode().createRef();
boolean success = false;
if ((h = ERT.whereis(name).testHandle()) != null) {
success = self.monitor(h, object, ref);
}
if (!success) {
self.mbox_send(ETuple.make(ERT.am_DOWN, ref, am_process, object, ERT.am_noproc));
}
return ref;
} else {
EPeer peer = (EPeer) EPeer.get(node);
if (peer != null) {
ERef ref = ERT.getLocalNode().createRef();
self.monitor(tup, ref);
peer.dsig_monitor(self.self_handle(), name, ref);
return ref;
}
return ErlDist.dmonitor_p2_trap.invoke(self, new EObject[] {how, object});
}
}
throw ERT.badarg(how, object);
}
@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();
}
}
