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https://github.com/darlinghq/darling-JavaScriptCore.git
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67 lines
2.5 KiB
C++
67 lines
2.5 KiB
C++
/*
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* Copyright (C) 2017-2018 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 <wtf/PrintStream.h>
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#include <wtf/SinglyLinkedListWithTail.h>
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namespace JSC {
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class BlockDirectory;
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class Heap;
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class Subspace;
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class AlignedMemoryAllocator {
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WTF_MAKE_NONCOPYABLE(AlignedMemoryAllocator);
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WTF_MAKE_FAST_ALLOCATED;
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public:
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AlignedMemoryAllocator();
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virtual ~AlignedMemoryAllocator();
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virtual void* tryAllocateAlignedMemory(size_t alignment, size_t size) = 0;
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virtual void freeAlignedMemory(void*) = 0;
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virtual void dump(PrintStream&) const = 0;
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void registerDirectory(Heap&, BlockDirectory*);
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BlockDirectory* firstDirectory() const { return m_directories.first(); }
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void registerSubspace(Subspace*);
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// Some of derived memory allocators do not have these features because they do not use them.
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// For example, IsoAlignedMemoryAllocator does not have "realloc" feature since it never extends / shrinks the allocated memory region.
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virtual void* tryAllocateMemory(size_t) = 0;
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virtual void freeMemory(void*) = 0;
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virtual void* tryReallocateMemory(void*, size_t) = 0;
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private:
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SinglyLinkedListWithTail<BlockDirectory> m_directories;
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SinglyLinkedListWithTail<Subspace> m_subspaces;
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};
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} // namespace WTF
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