1 /* 2 * Copyright (c) 2015, 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 #ifndef SHARE_GC_Z_ZPAGECACHE_HPP 25 #define SHARE_GC_Z_ZPAGECACHE_HPP 26 27 #include "gc/z/zList.hpp" 28 #include "gc/z/zPage.hpp" 29 #include "gc/z/zValue.hpp" 30 #include "memory/allocation.hpp" 31 32 class ZPageCacheFlushClosure : public StackObj { 33 protected: 34 const size_t _requested; 35 size_t _flushed; 36 37 public: 38 ZPageCacheFlushClosure(size_t requested); 39 size_t overflushed() const; 40 virtual bool do_page(const ZPage* page) = 0; 41 }; 42 43 class ZPageCache { 44 private: 45 size_t _available; 46 ZPerNUMA<ZList<ZPage> > _small; 47 ZList<ZPage> _medium; 48 ZList<ZPage> _large; 49 50 ZPage* alloc_small_page(); 51 ZPage* alloc_medium_page(); 52 ZPage* alloc_large_page(size_t size); 53 54 ZPage* alloc_oversized_medium_page(size_t size); 55 ZPage* alloc_oversized_large_page(size_t size); 56 ZPage* alloc_oversized_page(size_t size); 57 58 void free_page_inner(ZPage* page); 59 60 bool flush_list_inner(ZPageCacheFlushClosure* cl, ZList<ZPage>* from, ZList<ZPage>* to); 61 void flush_list(ZPageCacheFlushClosure* cl, ZList<ZPage>* from, ZList<ZPage>* to); 62 void flush_per_numa_lists(ZPageCacheFlushClosure* cl, ZPerNUMA<ZList<ZPage> >* from, ZList<ZPage>* to); 63 64 public: 65 ZPageCache(); 66 67 size_t available() const; 68 69 ZPage* alloc_page(uint8_t type, size_t size); 70 void free_page(ZPage* page); 71 72 void flush(ZPageCacheFlushClosure* cl, ZList<ZPage>* to); 73 74 void pages_do(ZPageClosure* cl) const; 75 }; 76 77 #endif // SHARE_GC_Z_ZPAGECACHE_HPP