1 /* 2 * Copyright (c) 2001, 2005, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 class AdaptivePaddedAverage; 26 27 class PSPermGen : public PSOldGen { 28 friend class VMStructs; 29 protected: 30 AdaptivePaddedAverage* _avg_size; // Used for sizing 31 size_t _last_used; // Amount used at last GC, used for sizing 32 33 public: 34 // Initialize the generation. 35 PSPermGen(ReservedSpace rs, size_t alignment, size_t initial_byte_size, 36 size_t minimum_byte_size, size_t maximum_byte_size, 37 const char* gen_name, int level); 38 39 // Permanent Gen special allocation. Uses the OldGen allocation 40 // routines, which should not be directly called on this generation. 41 HeapWord* allocate_permanent(size_t word_size); 42 43 // Size calculation. 44 void compute_new_size(size_t used_before_collection); 45 46 // MarkSweep code 47 virtual void precompact(); 48 49 // Parallel old 50 virtual void move_and_update(ParCompactionManager* cm); 51 52 virtual const char* name() const { return "PSPermGen"; } 53 };