1 /*
2  * Copyright (C) 2013 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_OBJECT_CALLBACKS_H_
18 #define ART_RUNTIME_OBJECT_CALLBACKS_H_
19 
20 #include "base/macros.h"
21 
22 namespace art {
23 namespace mirror {
24 class Object;
25 template<class MirrorType> class HeapReference;
26 }  // namespace mirror
27 
28 class IsMarkedVisitor {
29  public:
~IsMarkedVisitor()30   virtual ~IsMarkedVisitor() {}
31   // Return null if an object is not marked, otherwise returns the new address of that object.
32   // May return the same address as the input if the object did not move.
33   virtual mirror::Object* IsMarked(mirror::Object* obj) = 0;
34 };
35 
36 class MarkObjectVisitor {
37  public:
~MarkObjectVisitor()38   virtual ~MarkObjectVisitor() {}
39   // Mark an object and return the new address of an object.
40   // May return the same address as the input if the object did not move.
41   virtual mirror::Object* MarkObject(mirror::Object* obj) = 0;
42   // Mark an object and update the value stored in the heap reference if the object moved.
43   virtual void MarkHeapReference(mirror::HeapReference<mirror::Object>* obj,
44                                  bool do_atomic_update) = 0;
45 };
46 
47 }  // namespace art
48 
49 #endif  // ART_RUNTIME_OBJECT_CALLBACKS_H_
50