| /* |
| * Copyright 2001-2004 Sun Microsystems, Inc. All Rights Reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| */ |
| |
| // The specification of a generation. This class also encapsulates |
| // some generation-specific behavior. This is done here rather than as a |
| // virtual function of Generation because these methods are needed in |
| // initialization of the Generations. |
| class GenerationSpec : public CHeapObj { |
| friend class VMStructs; |
| private: |
| Generation::Name _name; |
| size_t _init_size; |
| size_t _max_size; |
| |
| public: |
| GenerationSpec(Generation::Name name, size_t init_size, size_t max_size) { |
| _name = name; |
| _init_size = init_size; |
| _max_size = max_size; |
| } |
| |
| Generation* init(ReservedSpace rs, int level, GenRemSet* remset); |
| |
| // Accessors |
| Generation::Name name() const { return _name; } |
| size_t init_size() const { return _init_size; } |
| void set_init_size(size_t size) { _init_size = size; } |
| size_t max_size() const { return _max_size; } |
| void set_max_size(size_t size) { _max_size = size; } |
| |
| // Alignment |
| void align(size_t alignment) { |
| set_init_size(align_size_up(init_size(), alignment)); |
| set_max_size(align_size_up(max_size(), alignment)); |
| } |
| |
| // Return the number of regions contained in the generation which |
| // might need to be independently covered by a remembered set. |
| virtual int n_covered_regions() const { return 1; } |
| }; |
| |
| typedef GenerationSpec* GenerationSpecPtr; |
| |
| // The specification of a permanent generation. This class is very |
| // similar to GenerationSpec in use. Due to PermGen's not being a |
| // true Generation, we cannot combine the spec classes either. |
| class PermanentGenerationSpec : public CHeapObj { |
| friend class VMStructs; |
| private: |
| PermGen::Name _name; |
| size_t _init_size; |
| size_t _max_size; |
| size_t _read_only_size; |
| size_t _read_write_size; |
| size_t _misc_data_size; |
| size_t _misc_code_size; |
| bool _enable_shared_spaces; |
| |
| enum { |
| _n_spaces = 2 |
| }; |
| |
| public: |
| PermanentGenerationSpec(PermGen::Name name, size_t init_size, |
| size_t max_size, size_t read_only_size, |
| size_t read_write_size, size_t misc_data_size, |
| size_t misc_code_size); |
| |
| PermGen* init(ReservedSpace rs, size_t init_size, GenRemSet* remset); |
| |
| void disable_sharing() { |
| _enable_shared_spaces = false; |
| _read_only_size = 0; |
| _read_write_size = 0; |
| _misc_data_size = 0; |
| _misc_code_size = 0; |
| } |
| |
| // Accessors |
| PermGen::Name name() const { return _name; } |
| size_t init_size() const { return _init_size; } |
| void set_init_size(size_t size) { _init_size = size; } |
| |
| // Max size for user DOES NOT include shared spaces. |
| // Max size for space allocation DOES include shared spaces. |
| size_t max_size() const { |
| return _max_size + _read_only_size + _read_write_size; |
| } |
| |
| // Need one covered region for the main space, and one for the shared |
| // spaces (together). |
| int n_covered_regions() const { return 2; } |
| |
| void align(size_t alignment); |
| |
| size_t read_only_size() const { return _read_only_size; } |
| size_t read_write_size() const { return _read_write_size; } |
| size_t misc_data_size() const { return _misc_data_size; } |
| size_t misc_code_size() const { return _misc_code_size; } |
| bool enable_shared_spaces() const { return _enable_shared_spaces; } |
| }; |