1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/src/share/vm/memory/freeBlockDictionary.hpp Thu Mar 29 19:46:24 2012 -0700 1.3 @@ -0,0 +1,102 @@ 1.4 +/* 1.5 + * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. 1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 1.7 + * 1.8 + * This code is free software; you can redistribute it and/or modify it 1.9 + * under the terms of the GNU General Public License version 2 only, as 1.10 + * published by the Free Software Foundation. 1.11 + * 1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT 1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1.15 + * version 2 for more details (a copy is included in the LICENSE file that 1.16 + * accompanied this code). 1.17 + * 1.18 + * You should have received a copy of the GNU General Public License version 1.19 + * 2 along with this work; if not, write to the Free Software Foundation, 1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1.21 + * 1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 1.23 + * or visit www.oracle.com if you need additional information or have any 1.24 + * questions. 1.25 + * 1.26 + */ 1.27 + 1.28 +#ifndef SHARE_VM_MEMORY_FREEBLOCKDICTIONARY_HPP 1.29 +#define SHARE_VM_MEMORY_FREEBLOCKDICTIONARY_HPP 1.30 + 1.31 +#include "memory/allocation.hpp" 1.32 +#include "runtime/mutex.hpp" 1.33 +#include "utilities/debug.hpp" 1.34 +#include "utilities/globalDefinitions.hpp" 1.35 +#include "utilities/ostream.hpp" 1.36 + 1.37 +// A FreeBlockDictionary is an abstract superclass that will allow 1.38 +// a number of alternative implementations in the future. 1.39 +template <class Chunk> 1.40 +class FreeBlockDictionary: public CHeapObj { 1.41 + public: 1.42 + enum Dither { 1.43 + atLeast, 1.44 + exactly, 1.45 + roughly 1.46 + }; 1.47 + enum DictionaryChoice { 1.48 + dictionaryBinaryTree = 0, 1.49 + dictionarySplayTree = 1, 1.50 + dictionarySkipList = 2 1.51 + }; 1.52 + 1.53 + private: 1.54 + NOT_PRODUCT(Mutex* _lock;) 1.55 + 1.56 + public: 1.57 + virtual void removeChunk(Chunk* fc) = 0; 1.58 + virtual Chunk* getChunk(size_t size, Dither dither = atLeast) = 0; 1.59 + virtual void returnChunk(Chunk* chunk) = 0; 1.60 + virtual size_t totalChunkSize(debug_only(const Mutex* lock)) const = 0; 1.61 + virtual size_t maxChunkSize() const = 0; 1.62 + virtual size_t minSize() const = 0; 1.63 + // Reset the dictionary to the initial conditions for a single 1.64 + // block. 1.65 + virtual void reset(HeapWord* addr, size_t size) = 0; 1.66 + virtual void reset() = 0; 1.67 + 1.68 + virtual void dictCensusUpdate(size_t size, bool split, bool birth) = 0; 1.69 + virtual bool coalDictOverPopulated(size_t size) = 0; 1.70 + virtual void beginSweepDictCensus(double coalSurplusPercent, 1.71 + float inter_sweep_current, float inter_sweep_estimate, 1.72 + float intra__sweep_current) = 0; 1.73 + virtual void endSweepDictCensus(double splitSurplusPercent) = 0; 1.74 + virtual Chunk* findLargestDict() const = 0; 1.75 + // verify that the given chunk is in the dictionary. 1.76 + virtual bool verifyChunkInFreeLists(Chunk* tc) const = 0; 1.77 + 1.78 + // Sigma_{all_free_blocks} (block_size^2) 1.79 + virtual double sum_of_squared_block_sizes() const = 0; 1.80 + 1.81 + virtual Chunk* find_chunk_ends_at(HeapWord* target) const = 0; 1.82 + virtual void inc_totalSize(size_t v) = 0; 1.83 + virtual void dec_totalSize(size_t v) = 0; 1.84 + 1.85 + NOT_PRODUCT ( 1.86 + virtual size_t sumDictReturnedBytes() = 0; 1.87 + virtual void initializeDictReturnedBytes() = 0; 1.88 + virtual size_t totalCount() = 0; 1.89 + ) 1.90 + 1.91 + virtual void reportStatistics() const { 1.92 + gclog_or_tty->print("No statistics available"); 1.93 + } 1.94 + 1.95 + virtual void printDictCensus() const = 0; 1.96 + virtual void print_free_lists(outputStream* st) const = 0; 1.97 + 1.98 + virtual void verify() const = 0; 1.99 + 1.100 + Mutex* par_lock() const PRODUCT_RETURN0; 1.101 + void set_par_lock(Mutex* lock) PRODUCT_RETURN; 1.102 + void verify_par_locked() const PRODUCT_RETURN; 1.103 +}; 1.104 + 1.105 +#endif // SHARE_VM_MEMORY_FREEBLOCKDICTIONARY_HPP