hotspot/src/share/vm/memory/blockOffsetTable.inline.hpp
changeset 1 489c9b5090e2
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0:fd16c54261b3 1:489c9b5090e2
       
     1 /*
       
     2  * Copyright 2000-2002 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  */
       
    24 
       
    25 //////////////////////////////////////////////////////////////////////////
       
    26 // BlockOffsetTable inlines
       
    27 //////////////////////////////////////////////////////////////////////////
       
    28 inline HeapWord* BlockOffsetTable::block_start(const void* addr) const {
       
    29   if (addr >= _bottom && addr < _end) {
       
    30     return block_start_unsafe(addr);
       
    31   } else {
       
    32     return NULL;
       
    33   }
       
    34 }
       
    35 
       
    36 //////////////////////////////////////////////////////////////////////////
       
    37 // BlockOffsetSharedArray inlines
       
    38 //////////////////////////////////////////////////////////////////////////
       
    39 inline size_t BlockOffsetSharedArray::index_for(const void* p) const {
       
    40   char* pc = (char*)p;
       
    41   assert(pc >= (char*)_reserved.start() &&
       
    42          pc <  (char*)_reserved.end(),
       
    43          "p not in range.");
       
    44   size_t delta = pointer_delta(pc, _reserved.start(), sizeof(char));
       
    45   size_t result = delta >> LogN;
       
    46   assert(result < _vs.committed_size(), "bad index from address");
       
    47   return result;
       
    48 }
       
    49 
       
    50 inline HeapWord* BlockOffsetSharedArray::address_for_index(size_t index) const {
       
    51   assert(index < _vs.committed_size(), "bad index");
       
    52   HeapWord* result = _reserved.start() + (index << LogN_words);
       
    53   assert(result >= _reserved.start() && result < _reserved.end(),
       
    54          "bad address from index");
       
    55   return result;
       
    56 }
       
    57 
       
    58 
       
    59 //////////////////////////////////////////////////////////////////////////
       
    60 // BlockOffsetArrayNonContigSpace inlines
       
    61 //////////////////////////////////////////////////////////////////////////
       
    62 inline void BlockOffsetArrayNonContigSpace::freed(HeapWord* blk_start,
       
    63                                                   HeapWord* blk_end) {
       
    64   // Verify that the BOT shows [blk_start, blk_end) to be one block.
       
    65   verify_single_block(blk_start, blk_end);
       
    66   // adjust _unallocated_block upward or downward
       
    67   // as appropriate
       
    68   if (BlockOffsetArrayUseUnallocatedBlock) {
       
    69     assert(_unallocated_block <= _end,
       
    70            "Inconsistent value for _unallocated_block");
       
    71     if (blk_end >= _unallocated_block && blk_start <= _unallocated_block) {
       
    72       // CMS-specific note: a block abutting _unallocated_block to
       
    73       // its left is being freed, a new block is being added or
       
    74       // we are resetting following a compaction
       
    75       _unallocated_block = blk_start;
       
    76     }
       
    77   }
       
    78 }