65 lines
2.2 KiB
C++
65 lines
2.2 KiB
C++
/*
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* Copyright (C) 2018 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. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "AllocationFailureMode.h"
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#include <climits>
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namespace JSC {
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class GCDeferralContext;
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class Heap;
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class LocalAllocator;
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// This abstracts how we refer to LocalAllocator so that we could eventually support thread-local
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// caches.
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class Allocator {
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public:
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Allocator() { }
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explicit Allocator(LocalAllocator* localAllocator)
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: m_localAllocator(localAllocator)
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{
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}
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void* allocate(Heap&, GCDeferralContext*, AllocationFailureMode) const;
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unsigned cellSize() const;
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LocalAllocator* localAllocator() const { return m_localAllocator; }
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bool operator==(const Allocator& other) const { return m_localAllocator == other.localAllocator(); }
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bool operator!=(const Allocator& other) const { return !(*this == other); }
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explicit operator bool() const { return *this != Allocator(); }
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private:
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LocalAllocator* m_localAllocator { nullptr };
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};
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} // namespace JSC
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