1/*
2 * Copyright (C) 2007 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 ANDROID_IMEMORY_H
18#define ANDROID_IMEMORY_H
19
20#include <stdint.h>
21#include <sys/types.h>
22#include <sys/mman.h>
23
24#include <utils/RefBase.h>
25#include <utils/Errors.h>
26#include <binder/IInterface.h>
27
28namespace android {
29
30// ----------------------------------------------------------------------------
31
32class IMemoryHeap : public IInterface
33{
34public:
35    DECLARE_META_INTERFACE(MemoryHeap);
36
37    // flags returned by getFlags()
38    enum {
39        READ_ONLY   = 0x00000001
40    };
41
42    virtual int         getHeapID() const = 0;
43    virtual void*       getBase() const = 0;
44    virtual size_t      getSize() const = 0;
45    virtual uint32_t    getFlags() const = 0;
46
47    // these are there just for backward source compatibility
48    int32_t heapID() const { return getHeapID(); }
49    void*   base() const  { return getBase(); }
50    size_t  virtualSize() const { return getSize(); }
51};
52
53class BnMemoryHeap : public BnInterface<IMemoryHeap>
54{
55public:
56    virtual status_t onTransact(
57            uint32_t code,
58            const Parcel& data,
59            Parcel* reply,
60            uint32_t flags = 0);
61
62    BnMemoryHeap();
63protected:
64    virtual ~BnMemoryHeap();
65};
66
67// ----------------------------------------------------------------------------
68
69class IMemory : public IInterface
70{
71public:
72    DECLARE_META_INTERFACE(Memory);
73
74    virtual sp<IMemoryHeap> getMemory(ssize_t* offset=0, size_t* size=0) const = 0;
75
76    // helpers
77    void* fastPointer(const sp<IBinder>& heap, ssize_t offset) const;
78    void* pointer() const;
79    size_t size() const;
80    ssize_t offset() const;
81};
82
83class BnMemory : public BnInterface<IMemory>
84{
85public:
86    virtual status_t onTransact(
87            uint32_t code,
88            const Parcel& data,
89            Parcel* reply,
90            uint32_t flags = 0);
91
92    BnMemory();
93protected:
94    virtual ~BnMemory();
95};
96
97// ----------------------------------------------------------------------------
98
99}; // namespace android
100
101#endif // ANDROID_IMEMORY_H
102