/*
* 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_LIBARTBASE_BASE_ARENA_OBJECT_H_
#define ART_LIBARTBASE_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_LIBARTBASE_BASE_ARENA_OBJECT_H_
