1 /* 2 * Copyright (c) 2003, 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 ASPSOldGen : public PSOldGen { 26 friend class VMStructs; 27 size_t _gen_size_limit; // Largest size the generation's reserved size 28 // can grow. 29 public: 30 ASPSOldGen(size_t initial_byte_size, 31 size_t minimum_byte_size, 32 size_t byte_size_limit, 33 const char* gen_name, int level); 34 ASPSOldGen(PSVirtualSpace* vs, 35 size_t initial_byte_size, 36 size_t minimum_byte_size, 37 size_t byte_size_limit, 38 const char* gen_name, int level); 39 size_t gen_size_limit() { return _gen_size_limit; } 40 size_t max_gen_size() { return _reserved.byte_size(); } 41 void set_gen_size_limit(size_t v) { _gen_size_limit = v; } 42 43 // After a shrink or expand reset the generation 44 void reset_after_change(); 45 46 // Return number of bytes that the virtual space in the generation is willing 47 // to expand or contract. The results from these methods should feed into the 48 // decisions about adjusting the virtual space. 49 size_t available_for_expansion(); 50 size_t available_for_contraction(); 51 52 // Accessors 53 void set_reserved(MemRegion v) { _reserved = v; } 54 55 // Debugging support 56 virtual const char* short_name() const { return "ASPSOldGen"; } 57 };