1 /* 2 * Copyright (c) 2003, 2015, 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 #ifndef SHARE_VM_GC_PARALLEL_ASPSOLDGEN_HPP 26 #define SHARE_VM_GC_PARALLEL_ASPSOLDGEN_HPP 27 28 #include "gc/parallel/mutableSpace.hpp" 29 #include "gc/parallel/objectStartArray.hpp" 30 #include "gc/parallel/psOldGen.hpp" 31 #include "gc/parallel/psVirtualspace.hpp" 32 #include "gc/parallel/psFileBackedVirtualspace.hpp" 33 #include "gc/parallel/spaceCounters.hpp" 34 #include "gc/shared/generationCounters.hpp" 35 36 class ASPSOldGen : public PSOldGen { 37 friend class VMStructs; 38 size_t _gen_size_limit; // Largest size the generation's reserved size 39 // can grow. 40 public: 41 ASPSOldGen(size_t initial_byte_size, 42 size_t minimum_byte_size, 43 size_t byte_size_limit, 44 const char* gen_name, int level); 45 ASPSOldGen(PSVirtualSpace* vs, 46 size_t initial_byte_size, 47 size_t minimum_byte_size, 48 size_t byte_size_limit, 49 const char* gen_name, int level); 50 size_t gen_size_limit() { return _gen_size_limit; } 51 size_t max_gen_size() { return _reserved.byte_size(); } 52 void set_gen_size_limit(size_t v) { _gen_size_limit = v; } 53 54 virtual void initialize_work(const char* perf_data_name, int level); 55 56 // After a shrink or expand reset the generation 57 void reset_after_change(); 58 59 // Return number of bytes that the virtual space in the generation is willing 60 // to expand or contract. The results from these methods should feed into the 61 // decisions about adjusting the virtual space. 62 size_t available_for_expansion(); 63 size_t available_for_contraction(); 64 65 // Accessors 66 void set_reserved(MemRegion v) { _reserved = v; } 67 68 // Debugging support 69 virtual const char* short_name() const { return "ASPSOldGen"; } 70 }; 71 72 #endif // SHARE_VM_GC_PARALLEL_ASPSOLDGEN_HPP