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