| /* |
| * Copyright 2000-2005 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. |
| * |
| */ |
| |
| // All heaps contains a "permanent generation," containing permanent |
| // (reflective) objects. This is like a regular generation in some ways, |
| // but unlike one in others, and so is split apart. |
| |
| class Generation; |
| class GenRemSet; |
| class CSpaceCounters; |
| |
| // PermGen models the part of the heap |
| |
| class PermGen : public CHeapObj { |
| friend class VMStructs; |
| protected: |
| size_t _capacity_expansion_limit; // maximum expansion allowed without a |
| // full gc occuring |
| |
| public: |
| enum Name { |
| MarkSweepCompact, MarkSweep, ConcurrentMarkSweep |
| }; |
| |
| // Permanent allocation (initialized) |
| virtual HeapWord* mem_allocate(size_t size) = 0; |
| |
| // Mark sweep support |
| virtual void compute_new_size() = 0; |
| |
| // Ideally, we would use MI (IMHO) but we'll do delegation instead. |
| virtual Generation* as_gen() const = 0; |
| |
| virtual void oop_iterate(OopClosure* cl) { |
| Generation* g = as_gen(); |
| assert(g != NULL, "as_gen() NULL"); |
| g->oop_iterate(cl); |
| } |
| |
| virtual void object_iterate(ObjectClosure* cl) { |
| Generation* g = as_gen(); |
| assert(g != NULL, "as_gen() NULL"); |
| g->object_iterate(cl); |
| } |
| |
| // Performance Counter support |
| virtual void update_counters() { |
| Generation* g = as_gen(); |
| assert(g != NULL, "as_gen() NULL"); |
| g->update_counters(); |
| } |
| }; |