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 "base/arena_allocator.h"
21 #include "base/logging.h"
22 #include "scoped_arena_allocator.h"
23 
24 namespace art {
25 
26 // Parent for arena allocated objects giving appropriate new and delete operators.
27 template<enum ArenaAllocKind kAllocKind>
28 class ArenaObject {
29  public:
30   // Allocate a new ArenaObject of 'size' bytes in the Arena.
31   void* operator new(size_t size, ArenaAllocator* allocator) {
32     return allocator->Alloc(size, kAllocKind);
33   }
34 
35   static void* operator new(size_t size, ScopedArenaAllocator* arena) {
36     return arena->Alloc(size, kAllocKind);
37   }
38 
39   void operator delete(void*, size_t) {
40     LOG(FATAL) << "UNREACHABLE";
41     UNREACHABLE();
42   }
43 };
44 
45 
46 // Parent for arena allocated objects that get deleted, gives appropriate new and delete operators.
47 // Currently this is used by the quick compiler for debug reference counting arena allocations.
48 template<enum ArenaAllocKind kAllocKind>
49 class DeletableArenaObject {
50  public:
51   // Allocate a new ArenaObject of 'size' bytes in the Arena.
52   void* operator new(size_t size, ArenaAllocator* allocator) {
53     return allocator->Alloc(size, kAllocKind);
54   }
55 
56   static void* operator new(size_t size, ScopedArenaAllocator* arena) {
57     return arena->Alloc(size, kAllocKind);
58   }
59 
60   void operator delete(void*, size_t) {
61     // Nop.
62   }
63 };
64 
65 }  // namespace art
66 
67 #endif  // ART_RUNTIME_BASE_ARENA_OBJECT_H_
68