@JRubyMethod(name = "_id2ref", required = 1, module = true, visibility = Visibility.PRIVATE)
public static IRubyObject id2ref(IRubyObject recv, IRubyObject id) {
Ruby runtime = id.getRuntime();
if (!(id instanceof RubyFixnum)) {
throw recv.getRuntime().newTypeError(id, recv.getRuntime().getFixnum());
}
RubyFixnum idFixnum = (RubyFixnum) id;
long longId = idFixnum.getLongValue();
if (longId == 0) {
return runtime.getFalse();
} else if (longId == 2) {
return runtime.getTrue();
} else if (longId == 4) {
return runtime.getNil();
} else if (longId % 2 != 0) {
// odd
return runtime.newFixnum((longId - 1) / 2);
} else {
if (runtime.isObjectSpaceEnabled()) {
IRubyObject object = runtime.getObjectSpace().id2ref(longId);
if (object == null) {
return runtime.getNil();
}
return object;
} else {
runtime
.getWarnings()
.warn("ObjectSpace is disabled; _id2ref only supports immediates, pass -X+O to enable");
return runtime.getNil();
}
}
}
@JRubyMethod(
name = "define_finalizer",
required = 1,
optional = 1,
frame = true,
module = true,
visibility = Visibility.PRIVATE)
public static IRubyObject define_finalizer(IRubyObject recv, IRubyObject[] args, Block block) {
Ruby runtime = recv.getRuntime();
IRubyObject finalizer = null;
if (args.length == 2) {
finalizer = args[1];
if (!finalizer.respondsTo("call")) {
throw runtime.newArgumentError(
"wrong type argument " + finalizer.getType() + " (should be callable)");
}
} else {
finalizer = runtime.newProc(Block.Type.PROC, block);
}
IRubyObject obj = args[0];
runtime.getObjectSpace().addFinalizer(obj, finalizer);
return runtime.newArray(runtime.newFixnum(runtime.getSafeLevel()), finalizer);
}
