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 ASPSYoungGen : public PSYoungGen { 26 friend class VMStructs; 27 private: 28 size_t _gen_size_limit; 29 protected: 30 virtual size_t available_to_live(); 31 32 public: 33 ASPSYoungGen(size_t initial_byte_size, 34 size_t minimum_byte_size, 35 size_t byte_size_limit); 36 37 ASPSYoungGen(PSVirtualSpace* vs, 38 size_t initial_byte_size, 39 size_t minimum_byte_size, 40 size_t byte_size_limit); 41 42 void initialize(ReservedSpace rs, size_t alignment); 43 void initialize_virtual_space(ReservedSpace rs, size_t alignment); 44 45 size_t gen_size_limit() { return _gen_size_limit; } 46 void set_gen_size_limit(size_t v) { _gen_size_limit = v; } 47 48 bool resize_generation(size_t eden_size, size_t survivor_size); 49 void resize_spaces(size_t eden_size, size_t survivor_size); 50 51 // Adjust eden to be consistent with the virtual space. 52 void reset_after_change(); 53 54 // Adaptive size policy support 55 // Return number of bytes that the generation can expand/contract. 56 size_t available_for_expansion(); 57 size_t available_for_contraction(); 58 59 // Accessors 60 void set_reserved(MemRegion v) { _reserved = v; } 61 62 // Printing support 63 virtual const char* short_name() const { return "ASPSYoungGen"; } 64 };