duke@435: /*
trims@1907:  * Copyright (c) 2001, 2004, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: // The specification of a generation.  This class also encapsulates
duke@435: // some generation-specific behavior.  This is done here rather than as a
duke@435: // virtual function of Generation because these methods are needed in
duke@435: // initialization of the Generations.
duke@435: class GenerationSpec : public CHeapObj {
duke@435:   friend class VMStructs;
duke@435: private:
duke@435:   Generation::Name _name;
duke@435:   size_t           _init_size;
duke@435:   size_t           _max_size;
duke@435: 
duke@435: public:
duke@435:   GenerationSpec(Generation::Name name, size_t init_size, size_t max_size) {
duke@435:     _name = name;
duke@435:     _init_size = init_size;
duke@435:     _max_size = max_size;
duke@435:   }
duke@435: 
duke@435:   Generation* init(ReservedSpace rs, int level, GenRemSet* remset);
duke@435: 
duke@435:   // Accessors
duke@435:   Generation::Name name()        const { return _name; }
duke@435:   size_t init_size()             const { return _init_size; }
duke@435:   void set_init_size(size_t size)      { _init_size = size; }
duke@435:   size_t max_size()              const { return _max_size; }
duke@435:   void set_max_size(size_t size)       { _max_size = size; }
duke@435: 
duke@435:   // Alignment
duke@435:   void align(size_t alignment) {
duke@435:     set_init_size(align_size_up(init_size(), alignment));
duke@435:     set_max_size(align_size_up(max_size(), alignment));
duke@435:   }
duke@435: 
duke@435:   // Return the number of regions contained in the generation which
duke@435:   // might need to be independently covered by a remembered set.
duke@435:   virtual int n_covered_regions() const { return 1; }
duke@435: };
duke@435: 
duke@435: typedef GenerationSpec* GenerationSpecPtr;
duke@435: 
duke@435: // The specification of a permanent generation. This class is very
duke@435: // similar to GenerationSpec in use. Due to PermGen's not being a
duke@435: // true Generation, we cannot combine the spec classes either.
duke@435: class PermanentGenerationSpec : public CHeapObj {
duke@435:   friend class VMStructs;
duke@435: private:
duke@435:   PermGen::Name    _name;
duke@435:   size_t           _init_size;
duke@435:   size_t           _max_size;
duke@435:   size_t           _read_only_size;
duke@435:   size_t           _read_write_size;
duke@435:   size_t           _misc_data_size;
duke@435:   size_t           _misc_code_size;
duke@435:   bool             _enable_shared_spaces;
duke@435: 
duke@435:   enum {
duke@435:     _n_spaces = 2
duke@435:   };
duke@435: 
duke@435: public:
duke@435:   PermanentGenerationSpec(PermGen::Name name, size_t init_size,
duke@435:                           size_t max_size, size_t read_only_size,
duke@435:                           size_t read_write_size, size_t misc_data_size,
duke@435:                           size_t misc_code_size);
duke@435: 
duke@435:   PermGen* init(ReservedSpace rs, size_t init_size, GenRemSet* remset);
duke@435: 
duke@435:   void disable_sharing() {
duke@435:     _enable_shared_spaces = false;
duke@435:     _read_only_size = 0;
duke@435:     _read_write_size = 0;
duke@435:     _misc_data_size = 0;
duke@435:     _misc_code_size = 0;
duke@435:   }
duke@435: 
duke@435:   // Accessors
duke@435:   PermGen::Name name()           const { return _name; }
duke@435:   size_t init_size()             const { return _init_size; }
duke@435:   void set_init_size(size_t size)      { _init_size = size; }
duke@435: 
duke@435:   // Max size for user DOES NOT include shared spaces.
duke@435:   // Max size for space allocation DOES include shared spaces.
duke@435:   size_t max_size() const {
duke@435:     return _max_size + _read_only_size + _read_write_size;
duke@435:   }
duke@435: 
duke@435:   // Need one covered region for the main space, and one for the shared
duke@435:   // spaces (together).
duke@435:   int n_covered_regions() const { return 2; }
duke@435: 
duke@435:   void align(size_t alignment);
duke@435: 
duke@435:   size_t read_only_size() const { return _read_only_size; }
duke@435:   size_t read_write_size() const { return _read_write_size; }
duke@435:   size_t misc_data_size() const { return _misc_data_size; }
duke@435:   size_t misc_code_size() const { return _misc_code_size; }
duke@435:   bool enable_shared_spaces()    const { return _enable_shared_spaces; }
duke@435: };