jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/concurrentMarkSweep/freeBlockDictionary.hpp@d1605aabd0a1

6719955: Update copyright year
Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell

     1 /*

     2  * Copyright 2001-2008 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    26 // A FreeBlockDictionary is an abstract superclass that will allow

    27 // a number of alternative implementations in the future.

    28 class FreeBlockDictionary: public CHeapObj {

    29  public:

    30   enum Dither {

    31     atLeast,

    32     exactly,

    33     roughly

    34   };

    35   enum DictionaryChoice {

    36     dictionaryBinaryTree = 0,

    37     dictionarySplayTree  = 1,

    38     dictionarySkipList   = 2

    39   };

    41  private:

    42   NOT_PRODUCT(Mutex* _lock;)

    44  public:

    45   virtual void       removeChunk(FreeChunk* fc) = 0;

    46   virtual FreeChunk* getChunk(size_t size, Dither dither = atLeast) = 0;

    47   virtual void       returnChunk(FreeChunk* chunk) = 0;

    48   virtual size_t     totalChunkSize(debug_only(const Mutex* lock)) const = 0;

    49   virtual size_t     maxChunkSize()   const = 0;

    50   virtual size_t     minSize()        const = 0;

    51   // Reset the dictionary to the initial conditions for a single

    52   // block.

    53   virtual void       reset(HeapWord* addr, size_t size) = 0;

    54   virtual void       reset() = 0;

    56   virtual void       dictCensusUpdate(size_t size, bool split, bool birth) = 0;

    57   virtual bool       coalDictOverPopulated(size_t size) = 0;

    58   virtual void       beginSweepDictCensus(double coalSurplusPercent,

    59                        float sweep_current, float sweep_ewstimate) = 0;

    60   virtual void       endSweepDictCensus(double splitSurplusPercent) = 0;

    61   virtual FreeChunk* findLargestDict() const = 0;

    62   // verify that the given chunk is in the dictionary.

    63   virtual bool verifyChunkInFreeLists(FreeChunk* tc) const = 0;

    65   // Sigma_{all_free_blocks} (block_size^2)

    66   virtual double sum_of_squared_block_sizes() const = 0;

    68   virtual FreeChunk* find_chunk_ends_at(HeapWord* target) const = 0;

    69   virtual void inc_totalSize(size_t v) = 0;

    70   virtual void dec_totalSize(size_t v) = 0;

    72   NOT_PRODUCT (

    73     virtual size_t   sumDictReturnedBytes() = 0;

    74     virtual void     initializeDictReturnedBytes() = 0;

    75     virtual size_t   totalCount() = 0;

    76   )

    78   virtual void       reportStatistics() const {

    79     gclog_or_tty->print("No statistics available");

    80   }

    82   virtual void       printDictCensus() const = 0;

    84   virtual void       verify()         const = 0;

    86   Mutex* par_lock()                const PRODUCT_RETURN0;

    87   void   set_par_lock(Mutex* lock)       PRODUCT_RETURN;

    88   void   verify_par_locked()       const PRODUCT_RETURN;

    89 };

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