MarkSweep.h revision 375fb116bcb817b37509ab579dbd55cdbb765cbf 
1/*
2 * Copyright (C) 2008 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#ifndef DALVIK_ALLOC_MARK_SWEEP_H_
17#define DALVIK_ALLOC_MARK_SWEEP_H_
18
19#include "alloc/HeapBitmap.h"
20#include "alloc/HeapSource.h"
21
22struct GcMarkStack {
23    /* Highest address (exclusive)
24     */
25    const Object **limit;
26
27    /* Current top of the stack (exclusive)
28     */
29    const Object **top;
30
31    /* Lowest address (inclusive)
32     */
33    const Object **base;
34
35    /* Maximum stack size, in bytes.
36     */
37    size_t length;
38};
39
40/* This is declared publicly so that it can be included in gDvm.gcHeap.
41 */
42struct GcMarkContext {
43    HeapBitmap *bitmap;
44    GcMarkStack stack;
45    const char *immuneLimit;
46    const void *finger;   // only used while scanning/recursing.
47};
48
49bool dvmHeapBeginMarkStep(bool isPartial);
50void dvmHeapMarkRootSet(void);
51void dvmHeapReMarkRootSet(void);
52void dvmHeapScanMarkedObjects(bool isPartial);
53void dvmHeapReScanMarkedObjects(void);
54void dvmHeapProcessReferences(Object **softReferences, bool clearSoftRefs,
55                              Object **weakReferences,
56                              Object **finalizerReferences,
57                              Object **phantomReferences);
58void dvmHeapFinishMarkStep(void);
59void dvmHeapSweepSystemWeaks(void);
60void dvmHeapSweepUnmarkedObjects(bool isPartial, bool isConcurrent,
61                                 size_t *numObjects, size_t *numBytes);
62void dvmEnqueueClearedReferences(Object **references);
63
64#endif  // DALVIK_ALLOC_MARK_SWEEP_H_
65