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73 lines
2.2 KiB
73 lines
2.2 KiB
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_LIBARTBASE_BASE_ARENA_OBJECT_H_
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#define ART_LIBARTBASE_BASE_ARENA_OBJECT_H_
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#include <android-base/logging.h>
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#include "arena_allocator.h"
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#include "macros.h"
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#include "scoped_arena_allocator.h"
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namespace art {
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// Parent for arena allocated objects giving appropriate new and delete operators.
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template<enum ArenaAllocKind kAllocKind>
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class ArenaObject {
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public:
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// Allocate a new ArenaObject of 'size' bytes in the Arena.
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void* operator new(size_t size, ArenaAllocator* allocator) {
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return allocator->Alloc(size, kAllocKind);
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}
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static void* operator new(size_t size, ScopedArenaAllocator* allocator) {
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return allocator->Alloc(size, kAllocKind);
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}
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void operator delete(void*, size_t) {
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LOG(FATAL) << "UNREACHABLE";
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UNREACHABLE();
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}
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// NOTE: Providing placement new (and matching delete) for constructing container elements.
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ALWAYS_INLINE void* operator new(size_t, void* ptr) noexcept { return ptr; }
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ALWAYS_INLINE void operator delete(void*, void*) noexcept { }
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};
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// Parent for arena allocated objects that get deleted, gives appropriate new and delete operators.
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template<enum ArenaAllocKind kAllocKind>
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class DeletableArenaObject {
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public:
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// Allocate a new ArenaObject of 'size' bytes in the Arena.
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void* operator new(size_t size, ArenaAllocator* allocator) {
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return allocator->Alloc(size, kAllocKind);
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}
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static void* operator new(size_t size, ScopedArenaAllocator* allocator) {
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return allocator->Alloc(size, kAllocKind);
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}
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void operator delete(void*, size_t) {
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// Nop.
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}
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};
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} // namespace art
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#endif // ART_LIBARTBASE_BASE_ARENA_OBJECT_H_
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