WriteBarrier.h revision 375fb116bcb817b37509ab579dbd55cdbb765cbf 
1/*
2 * Copyright (C) 2010 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 DALVIK_ALLOC_WRITEBARRIER_H_
18#define DALVIK_ALLOC_WRITEBARRIER_H_
19
20/*
21 * Note writes to the heap. These functions must be called if a field
22 * of an Object in the heap changes, and before any GC safe-point. The
23 * call is not needed if NULL is stored in the field.
24 */
25
26/*
27 * The address within the Object has been written, and perhaps changed.
28 */
29INLINE void dvmWriteBarrierField(const Object *obj, void *addr)
30{
31    dvmMarkCard(obj);
32}
33
34/*
35 * All of the Object may have changed.
36 */
37INLINE void dvmWriteBarrierObject(const Object *obj)
38{
39    dvmMarkCard(obj);
40}
41
42/*
43 * Some or perhaps all of the array indexes in the Array, greater than
44 * or equal to start and strictly less than end, have been written,
45 * and perhaps changed.
46 */
47INLINE void dvmWriteBarrierArray(const ArrayObject *obj,
48                                 size_t start, size_t end)
49{
50    dvmMarkCard((Object *)obj);
51}
52
53#endif  // DALVIK_ALLOC_WRITEBARRIER_H_
54