Wed, 27 Apr 2016 01:25:04 +0800
Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17
1 /*
2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #ifndef SHARE_VM_CI_CINULLOBJECT_HPP
26 #define SHARE_VM_CI_CINULLOBJECT_HPP
28 #include "ci/ciClassList.hpp"
29 #include "ci/ciObject.hpp"
30 #include "ci/ciUtilities.hpp"
32 // ciNullObject
33 //
34 // This class represents a null reference in the VM.
35 class ciNullObject : public ciObject {
36 CI_PACKAGE_ACCESS
38 private:
39 ciNullObject() : ciObject() {}
41 const char* type_string() { return "ciNullObject"; }
43 void print_impl(outputStream* st);
45 public:
46 // Is this ciObject a Java Language Object? That is,
47 // is the ciObject an instance or an array
48 bool is_java_object() { return true; }
50 // What kind of ciObject is this?
51 bool is_null_object() const { return true; }
52 bool is_classless() const { return true; }
54 // Get the distinguished instance of this klass.
55 static ciNullObject* make();
56 };
58 #endif // SHARE_VM_CI_CINULLOBJECT_HPP