summaryrefslogtreecommitdiffstats
path: root/include/binder/MemoryHeapPmem.h
blob: aac164f72b1dded0bf4574491e55ec1d2b5c4057 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef ANDROID_MEMORY_HEAP_PMEM_H
#define ANDROID_MEMORY_HEAP_PMEM_H

#include <stdlib.h>
#include <stdint.h>

#include <binder/MemoryHeapBase.h>
#include <binder/IMemory.h>
#include <utils/SortedVector.h>
#include <utils/threads.h>

namespace android {

class MemoryHeapBase;

// ---------------------------------------------------------------------------

class MemoryHeapPmem : public MemoryHeapBase
{
public:
    class MemoryPmem : public BnMemory {
    public:
        MemoryPmem(const sp<MemoryHeapPmem>& heap);
        ~MemoryPmem();
    protected:
        const sp<MemoryHeapPmem>&  getHeap() const { return mClientHeap; }
    private:
        friend class MemoryHeapPmem;
        virtual void revoke() = 0;
        sp<MemoryHeapPmem>  mClientHeap;
    };
    
    MemoryHeapPmem(const sp<MemoryHeapBase>& pmemHeap,
                uint32_t flags = IMemoryHeap::MAP_ONCE);
    ~MemoryHeapPmem();

    /* HeapInterface additions */
    virtual sp<IMemory> mapMemory(size_t offset, size_t size);

    /* make the whole heap visible (you know who you are) */
    virtual status_t slap();
    
    /* hide (revoke) the whole heap (the client will see the garbage page) */
    virtual status_t unslap();
    
    /* revoke all allocations made by this heap */
    virtual void revoke();

private:
    /* use this to create your own IMemory for mapMemory */
    virtual sp<MemoryPmem> createMemory(size_t offset, size_t size);
    void remove(const wp<MemoryPmem>& memory);

private:
    sp<MemoryHeapBase>              mParentHeap;
    mutable Mutex                   mLock;
    SortedVector< wp<MemoryPmem> >  mAllocations;
};


// ---------------------------------------------------------------------------
}; // namespace android

#endif // ANDROID_MEMORY_HEAP_PMEM_H