heap/HandleBlockInlines.h

   1 /*
   2  * Copyright (C) 2013 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  23  * THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef HandleBlockInlines_h
  27 #define HandleBlockInlines_h
  28
  29 #include "HandleBlock.h"
  30 #include <wtf/FastMalloc.h>
  31
  32 namespace JSC {
  33
  34 inline HandleBlock* HandleBlock::create(HandleSet* handleSet)
  35 {
  36     return new (NotNull, fastAlignedMalloc(blockSize, blockSize)) HandleBlock(handleSet);
  37 }
  38
  39 inline void HandleBlock::destroy(HandleBlock* block)
  40 {
  41     block->~HandleBlock();
  42     fastAlignedFree(block);
  43 }
  44
  45 inline HandleBlock::HandleBlock(HandleSet* handleSet)
  46     : DoublyLinkedListNode<HandleBlock>()
  47     , m_handleSet(handleSet)
  48 {
  49 }
  50
  51 inline char* HandleBlock::payloadEnd()
  52 {
  53     return reinterpret_cast<char*>(this) + blockSize;
  54 }
  55
  56 inline char* HandleBlock::payload()
  57 {
  58     return reinterpret_cast<char*>(this) + WTF::roundUpToMultipleOf<sizeof(double)>(sizeof(HandleBlock));
  59 }
  60
  61 inline HandleNode* HandleBlock::nodes()
  62 {
  63     return reinterpret_cast_ptr<HandleNode*>(payload());
  64 }
  65
  66 inline HandleNode* HandleBlock::nodeAtIndex(unsigned i)
  67 {
  68     ASSERT(i < nodeCapacity());
  69     return &nodes()[i];
  70 }
  71
  72 inline unsigned HandleBlock::nodeCapacity()
  73 {
  74     return (payloadEnd() - payload()) / sizeof(HandleNode);
  75 }
  76
  77 } // namespace JSC
  78
  79 #endif // HandleBlockInlines_h