1 /* 2 * Copyright (c) 2018, 2019, 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_MEMORY_METASPACE_CLASSLOADERMETASPACE_HPP 26 #define SHARE_MEMORY_METASPACE_CLASSLOADERMETASPACE_HPP 27 28 #include "memory/allocation.hpp" 29 #include "memory/metaspace/metaspaceEnums.hpp" 30 31 class Mutex; 32 33 namespace metaspace { 34 35 class SpaceManager; 36 class ClassLoaderMetaspaceStatistics; 37 38 class ClassLoaderMetaspace : public CHeapObj<mtClass> { 39 40 // The CLD lock. 41 Mutex* const _lock; 42 43 const MetaspaceType _space_type; 44 45 SpaceManager* _non_class_space_manager; 46 SpaceManager* _class_space_manager; 47 48 Mutex* lock() const { return _lock; } 49 SpaceManager* non_class_space_manager() const { return _non_class_space_manager; } 50 SpaceManager* class_space_manager() const { return _class_space_manager; } 51 52 SpaceManager* get_space_manager(bool is_class) { 53 return is_class ? class_space_manager() : non_class_space_manager(); 54 } 55 56 public: 57 58 ClassLoaderMetaspace(Mutex* lock, MetaspaceType space_type); 59 60 ~ClassLoaderMetaspace(); 61 62 MetaspaceType space_type() const { return _space_type; } 63 64 // Allocate word_size words from Metaspace. 65 MetaWord* allocate(size_t word_size, MetadataType mdType); 66 67 // Attempt to expand the GC threshold to be good for at least another word_size words 68 // and allocate. Returns NULL if failure. Used during Metaspace GC. 69 MetaWord* expand_and_allocate(size_t word_size, MetadataType mdType); 70 71 // Prematurely returns a metaspace allocation to the _block_freelists 72 // because it is not needed anymore. 73 void deallocate(MetaWord* ptr, size_t word_size, bool is_class); 74 75 // Update statistics. This walks all in-use chunks. 76 void add_to_statistics(ClassLoaderMetaspaceStatistics* out) const; 77 78 DEBUG_ONLY(void verify(bool slow) const;) 79 80 // TODO 81 size_t allocated_blocks_bytes() const { return 0; } 82 size_t allocated_chunks_bytes() const { return 0; } 83 84 }; 85 86 } // namespace metaspace 87 88 #endif // SHARE_MEMORY_METASPACE_CLASSLOADERMETASPACE_HPP