mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-26 21:50:53 +00:00
84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
/*
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* Copyright (C) 2011 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 "MarkedBlock.h"
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#include "TinyBloomFilter.h"
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#include <wtf/HashSet.h>
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namespace JSC {
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class MarkedBlock;
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class MarkedBlockSet {
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public:
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void add(MarkedBlock*);
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void remove(MarkedBlock*);
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TinyBloomFilter filter() const;
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const HashSet<MarkedBlock*>& set() const;
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private:
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void recomputeFilter();
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TinyBloomFilter m_filter;
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HashSet<MarkedBlock*> m_set;
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};
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inline void MarkedBlockSet::add(MarkedBlock* block)
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{
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m_filter.add(reinterpret_cast<Bits>(block));
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m_set.add(block);
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}
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inline void MarkedBlockSet::remove(MarkedBlock* block)
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{
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unsigned oldCapacity = m_set.capacity();
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m_set.remove(block);
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if (m_set.capacity() != oldCapacity) // Indicates we've removed a lot of blocks.
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recomputeFilter();
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}
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inline void MarkedBlockSet::recomputeFilter()
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{
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TinyBloomFilter filter;
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for (HashSet<MarkedBlock*>::iterator it = m_set.begin(); it != m_set.end(); ++it)
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filter.add(reinterpret_cast<Bits>(*it));
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m_filter = filter;
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}
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inline TinyBloomFilter MarkedBlockSet::filter() const
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{
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return m_filter;
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}
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inline const HashSet<MarkedBlock*>& MarkedBlockSet::set() const
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{
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return m_set;
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}
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} // namespace JSC
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