SharedRegionParcelable.cpp revision f53e613b3dedab3ecada2c93d8846233c442d129 
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#include <stdint.h>
18
19#include <sys/mman.h>
20#include <binder/Parcelable.h>
21
22#include <aaudio/AAudioDefinitions.h>
23
24#include "binding/SharedMemoryParcelable.h"
25#include "binding/SharedRegionParcelable.h"
26
27using android::NO_ERROR;
28using android::status_t;
29using android::Parcel;
30using android::Parcelable;
31
32using namespace aaudio;
33
34SharedRegionParcelable::SharedRegionParcelable() {}
35SharedRegionParcelable::~SharedRegionParcelable() {}
36
37void SharedRegionParcelable::setup(int32_t sharedMemoryIndex,
38                                   int32_t offsetInBytes,
39                                   int32_t sizeInBytes) {
40    mSharedMemoryIndex = sharedMemoryIndex;
41    mOffsetInBytes = offsetInBytes;
42    mSizeInBytes = sizeInBytes;
43}
44
45status_t SharedRegionParcelable::writeToParcel(Parcel* parcel) const {
46    parcel->writeInt32(mSizeInBytes);
47    if (mSizeInBytes > 0) {
48        parcel->writeInt32(mSharedMemoryIndex);
49        parcel->writeInt32(mOffsetInBytes);
50    }
51    return NO_ERROR; // TODO check for errors above
52}
53
54status_t SharedRegionParcelable::readFromParcel(const Parcel* parcel) {
55    parcel->readInt32(&mSizeInBytes);
56    if (mSizeInBytes > 0) {
57        parcel->readInt32(&mSharedMemoryIndex);
58        parcel->readInt32(&mOffsetInBytes);
59    }
60    return NO_ERROR; // TODO check for errors above
61}
62
63aaudio_result_t SharedRegionParcelable::resolve(SharedMemoryParcelable *memoryParcels,
64                                              void **regionAddressPtr) {
65    if (mSizeInBytes == 0) {
66        *regionAddressPtr = nullptr;
67        return AAUDIO_OK;
68    }
69    if (mSharedMemoryIndex < 0) {
70        ALOGE("SharedRegionParcelable invalid mSharedMemoryIndex = %d", mSharedMemoryIndex);
71        return AAUDIO_ERROR_INTERNAL;
72    }
73    SharedMemoryParcelable *memoryParcel = &memoryParcels[mSharedMemoryIndex];
74    return memoryParcel->resolve(mOffsetInBytes, mSizeInBytes, regionAddressPtr);
75}
76
77aaudio_result_t SharedRegionParcelable::validate() {
78    if (mSizeInBytes < 0 || mSizeInBytes >= MAX_MMAP_SIZE_BYTES) {
79        ALOGE("SharedRegionParcelable invalid mSizeInBytes = %d", mSizeInBytes);
80        return AAUDIO_ERROR_OUT_OF_RANGE;
81    }
82    if (mSizeInBytes > 0) {
83        if (mOffsetInBytes < 0 || mOffsetInBytes >= MAX_MMAP_OFFSET_BYTES) {
84            ALOGE("SharedRegionParcelable invalid mOffsetInBytes = %d", mOffsetInBytes);
85            return AAUDIO_ERROR_OUT_OF_RANGE;
86        }
87        if (mSharedMemoryIndex < 0 || mSharedMemoryIndex >= MAX_SHARED_MEMORIES) {
88            ALOGE("SharedRegionParcelable invalid mSharedMemoryIndex = %d", mSharedMemoryIndex);
89            return AAUDIO_ERROR_INTERNAL;
90        }
91    }
92    return AAUDIO_OK;
93}
94
95void SharedRegionParcelable::dump() {
96    ALOGD("SharedRegionParcelable mSizeInBytes = %d -----", mSizeInBytes);
97    if (mSizeInBytes > 0) {
98        ALOGD("SharedRegionParcelable mSharedMemoryIndex = %d", mSharedMemoryIndex);
99        ALOGD("SharedRegionParcelable mOffsetInBytes = %d", mOffsetInBytes);
100    }
101}
102