123 lines
4.3 KiB
C++
123 lines
4.3 KiB
C++
/*
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* Copyright (c) 2001, 2004, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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// The specification of a generation. This class also encapsulates
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// some generation-specific behavior. This is done here rather than as a
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// virtual function of Generation because these methods are needed in
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// initialization of the Generations.
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class GenerationSpec : public CHeapObj {
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friend class VMStructs;
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private:
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Generation::Name _name;
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size_t _init_size;
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size_t _max_size;
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public:
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GenerationSpec(Generation::Name name, size_t init_size, size_t max_size) {
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_name = name;
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_init_size = init_size;
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_max_size = max_size;
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}
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Generation* init(ReservedSpace rs, int level, GenRemSet* remset);
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// Accessors
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Generation::Name name() const { return _name; }
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size_t init_size() const { return _init_size; }
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void set_init_size(size_t size) { _init_size = size; }
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size_t max_size() const { return _max_size; }
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void set_max_size(size_t size) { _max_size = size; }
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// Alignment
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void align(size_t alignment) {
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set_init_size(align_size_up(init_size(), alignment));
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set_max_size(align_size_up(max_size(), alignment));
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}
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// Return the number of regions contained in the generation which
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// might need to be independently covered by a remembered set.
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virtual int n_covered_regions() const { return 1; }
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};
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typedef GenerationSpec* GenerationSpecPtr;
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// The specification of a permanent generation. This class is very
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// similar to GenerationSpec in use. Due to PermGen's not being a
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// true Generation, we cannot combine the spec classes either.
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class PermanentGenerationSpec : public CHeapObj {
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friend class VMStructs;
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private:
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PermGen::Name _name;
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size_t _init_size;
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size_t _max_size;
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size_t _read_only_size;
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size_t _read_write_size;
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size_t _misc_data_size;
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size_t _misc_code_size;
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bool _enable_shared_spaces;
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enum {
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_n_spaces = 2
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};
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public:
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PermanentGenerationSpec(PermGen::Name name, size_t init_size,
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size_t max_size, size_t read_only_size,
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size_t read_write_size, size_t misc_data_size,
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size_t misc_code_size);
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PermGen* init(ReservedSpace rs, size_t init_size, GenRemSet* remset);
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void disable_sharing() {
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_enable_shared_spaces = false;
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_read_only_size = 0;
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_read_write_size = 0;
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_misc_data_size = 0;
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_misc_code_size = 0;
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}
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// Accessors
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PermGen::Name name() const { return _name; }
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size_t init_size() const { return _init_size; }
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void set_init_size(size_t size) { _init_size = size; }
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// Max size for user DOES NOT include shared spaces.
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// Max size for space allocation DOES include shared spaces.
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size_t max_size() const {
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return _max_size + _read_only_size + _read_write_size;
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}
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// Need one covered region for the main space, and one for the shared
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// spaces (together).
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int n_covered_regions() const { return 2; }
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void align(size_t alignment);
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size_t read_only_size() const { return _read_only_size; }
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size_t read_write_size() const { return _read_write_size; }
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size_t misc_data_size() const { return _misc_data_size; }
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size_t misc_code_size() const { return _misc_code_size; }
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bool enable_shared_spaces() const { return _enable_shared_spaces; }
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};
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