Mercurial > hg > graal-compiler
comparison src/share/vm/ci/ciNullObject.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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-1:000000000000 | 0:a61af66fc99e |
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1 /* | |
2 * Copyright 1999-2000 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // ciNullObject | |
26 // | |
27 // This class represents a null reference in the VM. | |
28 class ciNullObject : public ciObject { | |
29 CI_PACKAGE_ACCESS | |
30 | |
31 private: | |
32 ciNullObject() : ciObject() {} | |
33 | |
34 const char* type_string() { return "ciNullObject"; } | |
35 | |
36 void print_impl(outputStream* st); | |
37 | |
38 public: | |
39 // Is this ciObject a Java Language Object? That is, | |
40 // is the ciObject an instance or an array | |
41 bool is_java_object() { return true; } | |
42 | |
43 // What kind of ciObject is this? | |
44 bool is_null_object() const { return true; } | |
45 bool is_classless() const { return true; } | |
46 | |
47 // Get the distinguished instance of this klass. | |
48 static ciNullObject* make(); | |
49 }; |