Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/ci/ciNullObject.hpp@01522ca68fc7 (annotated)
src/share/vm/ci/ciNullObject.hpp
Tue, 18 Jun 2013 12:31:07 -0700
- author
- johnc
- date
- Tue, 18 Jun 2013 12:31:07 -0700
- changeset 5277
- 01522ca68fc7
- parent 2314
- f95d63e2154a
- child 6876
- 710a3c8b516e
- permissions
- -rw-r--r--
8015237: Parallelize string table scanning during strong root processing
Summary: Parallelize the scanning of the intern string table by having each GC worker claim a given number of buckets. Changes were also reviewed by Per Liden <per.liden@oracle.com>.
Reviewed-by: tschatzl, stefank, twisti
| duke@435 | 1 | /* |
| stefank@2314 | 2 | * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. |
| duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 4 | * |
| duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 7 | * published by the Free Software Foundation. |
| duke@435 | 8 | * |
| duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 13 | * accompanied this code). |
| duke@435 | 14 | * |
| duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 18 | * |
| trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
| trims@1907 | 21 | * questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| stefank@2314 | 25 | #ifndef SHARE_VM_CI_CINULLOBJECT_HPP |
| stefank@2314 | 26 | #define SHARE_VM_CI_CINULLOBJECT_HPP |
| stefank@2314 | 27 | |
| stefank@2314 | 28 | #include "ci/ciClassList.hpp" |
| stefank@2314 | 29 | #include "ci/ciObject.hpp" |
| stefank@2314 | 30 | #include "ci/ciUtilities.hpp" |
| stefank@2314 | 31 | |
| duke@435 | 32 | // ciNullObject |
| duke@435 | 33 | // |
| duke@435 | 34 | // This class represents a null reference in the VM. |
| duke@435 | 35 | class ciNullObject : public ciObject { |
| duke@435 | 36 | CI_PACKAGE_ACCESS |
| duke@435 | 37 | |
| duke@435 | 38 | private: |
| duke@435 | 39 | ciNullObject() : ciObject() {} |
| duke@435 | 40 | |
| duke@435 | 41 | const char* type_string() { return "ciNullObject"; } |
| duke@435 | 42 | |
| duke@435 | 43 | void print_impl(outputStream* st); |
| duke@435 | 44 | |
| duke@435 | 45 | public: |
| duke@435 | 46 | // Is this ciObject a Java Language Object? That is, |
| duke@435 | 47 | // is the ciObject an instance or an array |
| duke@435 | 48 | bool is_java_object() { return true; } |
| duke@435 | 49 | |
| duke@435 | 50 | // What kind of ciObject is this? |
| duke@435 | 51 | bool is_null_object() const { return true; } |
| duke@435 | 52 | bool is_classless() const { return true; } |
| duke@435 | 53 | |
| duke@435 | 54 | // Get the distinguished instance of this klass. |
| duke@435 | 55 | static ciNullObject* make(); |
| duke@435 | 56 | }; |
| stefank@2314 | 57 | |
| stefank@2314 | 58 | #endif // SHARE_VM_CI_CINULLOBJECT_HPP |
