mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
/*
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* Copyright (C) 2013-2019 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <wtf/DoublyLinkedList.h>
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namespace JSC {
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class HandleSet;
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class HandleNode;
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class HandleBlock : public DoublyLinkedListNode<HandleBlock> {
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friend class WTF::DoublyLinkedListNode<HandleBlock>;
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public:
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static HandleBlock* create(HandleSet*);
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static void destroy(HandleBlock*);
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static HandleBlock* blockFor(HandleNode*);
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static constexpr size_t blockSize = 4 * KB;
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HandleSet* handleSet();
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HandleNode* nodes();
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HandleNode* nodeAtIndex(unsigned);
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unsigned nodeCapacity();
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private:
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HandleBlock(HandleSet*);
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char* payload();
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char* payloadEnd();
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static constexpr size_t s_blockMask = ~(blockSize - 1);
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HandleBlock* m_prev;
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HandleBlock* m_next;
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HandleSet* m_handleSet;
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};
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inline HandleBlock* HandleBlock::blockFor(HandleNode* node)
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{
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return reinterpret_cast<HandleBlock*>(reinterpret_cast<size_t>(node) & s_blockMask);
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}
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inline HandleSet* HandleBlock::handleSet()
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{
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return m_handleSet;
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}
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} // namespace JSC
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