1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_RUNTIME_BASE_ARENA_OBJECT_H_ 18 #define ART_RUNTIME_BASE_ARENA_OBJECT_H_ 19 20 #include <android-base/logging.h> 21 22 #include "arena_allocator.h" 23 #include "base/macros.h" 24 #include "scoped_arena_allocator.h" 25 26 namespace art { 27 28 // Parent for arena allocated objects giving appropriate new and delete operators. 29 template<enum ArenaAllocKind kAllocKind> 30 class ArenaObject { 31 public: 32 // Allocate a new ArenaObject of 'size' bytes in the Arena. 33 void* operator new(size_t size, ArenaAllocator* allocator) { 34 return allocator->Alloc(size, kAllocKind); 35 } 36 37 static void* operator new(size_t size, ScopedArenaAllocator* allocator) { 38 return allocator->Alloc(size, kAllocKind); 39 } 40 41 void operator delete(void*, size_t) { 42 LOG(FATAL) << "UNREACHABLE"; 43 UNREACHABLE(); 44 } 45 46 // NOTE: Providing placement new (and matching delete) for constructing container elements. 47 ALWAYS_INLINE void* operator new(size_t, void* ptr) noexcept { return ptr; } 48 ALWAYS_INLINE void operator delete(void*, void*) noexcept { } 49 }; 50 51 52 // Parent for arena allocated objects that get deleted, gives appropriate new and delete operators. 53 template<enum ArenaAllocKind kAllocKind> 54 class DeletableArenaObject { 55 public: 56 // Allocate a new ArenaObject of 'size' bytes in the Arena. 57 void* operator new(size_t size, ArenaAllocator* allocator) { 58 return allocator->Alloc(size, kAllocKind); 59 } 60 61 static void* operator new(size_t size, ScopedArenaAllocator* allocator) { 62 return allocator->Alloc(size, kAllocKind); 63 } 64 65 void operator delete(void*, size_t) { 66 // Nop. 67 } 68 }; 69 70 } // namespace art 71 72 #endif // ART_RUNTIME_BASE_ARENA_OBJECT_H_ 73
