@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); }