1 /*
2  * Copyright 2016 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_AAUDIO_SHARED_REGION_PARCELABLE_H
18 #define ANDROID_AAUDIO_SHARED_REGION_PARCELABLE_H
19 
20 #include <stdint.h>
21 
22 #include <sys/mman.h>
23 #include <binder/Parcelable.h>
24 
25 #include <aaudio/AAudio.h>
26 
27 #include "binding/SharedMemoryParcelable.h"
28 
29 using android::status_t;
30 using android::Parcel;
31 using android::Parcelable;
32 
33 namespace aaudio {
34 
35 class SharedRegionParcelable : public Parcelable {
36 public:
37     SharedRegionParcelable();
38     virtual ~SharedRegionParcelable();
39 
40     void setup(int32_t sharedMemoryIndex, int32_t offsetInBytes, int32_t sizeInBytes);
41 
42     virtual status_t writeToParcel(Parcel* parcel) const override;
43 
44     virtual status_t readFromParcel(const Parcel* parcel) override;
45 
46     aaudio_result_t resolve(SharedMemoryParcelable *memoryParcels, void **regionAddressPtr);
47 
48     bool isFileDescriptorSafe(SharedMemoryParcelable *memoryParcels);
49 
50     void dump();
51 
52 protected:
53     int32_t mSharedMemoryIndex = -1;
54     int32_t mOffsetInBytes     = 0;
55     int32_t mSizeInBytes       = 0;
56 
57 private:
58     aaudio_result_t validate() const;
59 };
60 
61 } /* namespace aaudio */
62 
63 #endif //ANDROID_AAUDIO_SHARED_REGION_PARCELABLE_H
64