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#define LOG_TAG "SharedRegionParcelable"
18//#define LOG_NDEBUG 0
19#include <utils/Log.h>
20
21#include <stdint.h>
22
23#include <sys/mman.h>
24#include <binder/Parcelable.h>
25
26#include <aaudio/AAudio.h>
27#include <utility/AAudioUtilities.h>
28
29#include "binding/SharedMemoryParcelable.h"
30#include "binding/SharedRegionParcelable.h"
31
32using android::NO_ERROR;
33using android::status_t;
34using android::Parcel;
35using android::Parcelable;
36
37using namespace aaudio;
38
39SharedRegionParcelable::SharedRegionParcelable() {}
40SharedRegionParcelable::~SharedRegionParcelable() {}
41
42void SharedRegionParcelable::setup(int32_t sharedMemoryIndex,
43                                   int32_t offsetInBytes,
44                                   int32_t sizeInBytes) {
45    mSharedMemoryIndex = sharedMemoryIndex;
46    mOffsetInBytes = offsetInBytes;
47    mSizeInBytes = sizeInBytes;
48}
49
50status_t SharedRegionParcelable::writeToParcel(Parcel* parcel) const {
51    status_t status = AAudioConvert_aaudioToAndroidStatus(validate());
52    if (status != NO_ERROR) goto error;
53
54    status = parcel->writeInt32(mSizeInBytes);
55    if (status != NO_ERROR) goto error;
56    if (mSizeInBytes > 0) {
57        status = parcel->writeInt32(mSharedMemoryIndex);
58        if (status != NO_ERROR) goto error;
59        status = parcel->writeInt32(mOffsetInBytes);
60        if (status != NO_ERROR) goto error;
61    }
62    return NO_ERROR;
63
64error:
65    ALOGE("%s returning %d", __func__, status);
66    return status;
67}
68
69status_t SharedRegionParcelable::readFromParcel(const Parcel* parcel) {
70    status_t status = parcel->readInt32(&mSizeInBytes);
71    if (status != NO_ERROR) goto error;
72    if (mSizeInBytes > 0) {
73        status = parcel->readInt32(&mSharedMemoryIndex);
74        if (status != NO_ERROR) goto error;
75        status = parcel->readInt32(&mOffsetInBytes);
76        if (status != NO_ERROR) goto error;
77    }
78    return AAudioConvert_aaudioToAndroidStatus(validate());
79
80error:
81    ALOGE("%s returning %d", __func__, status);
82    return status;
83}
84
85aaudio_result_t SharedRegionParcelable::resolve(SharedMemoryParcelable *memoryParcels,
86                                              void **regionAddressPtr) {
87    if (mSizeInBytes == 0) {
88        *regionAddressPtr = nullptr;
89        return AAUDIO_OK;
90    }
91    if (mSharedMemoryIndex < 0) {
92        ALOGE("invalid mSharedMemoryIndex = %d", mSharedMemoryIndex);
93        return AAUDIO_ERROR_INTERNAL;
94    }
95    SharedMemoryParcelable *memoryParcel = &memoryParcels[mSharedMemoryIndex];
96    return memoryParcel->resolve(mOffsetInBytes, mSizeInBytes, regionAddressPtr);
97}
98
99aaudio_result_t SharedRegionParcelable::validate() const {
100    if (mSizeInBytes < 0 || mSizeInBytes >= MAX_MMAP_SIZE_BYTES) {
101        ALOGE("invalid mSizeInBytes = %d", mSizeInBytes);
102        return AAUDIO_ERROR_OUT_OF_RANGE;
103    }
104    if (mSizeInBytes > 0) {
105        if (mOffsetInBytes < 0 || mOffsetInBytes >= MAX_MMAP_OFFSET_BYTES) {
106            ALOGE("invalid mOffsetInBytes = %d", mOffsetInBytes);
107            return AAUDIO_ERROR_OUT_OF_RANGE;
108        }
109        if (mSharedMemoryIndex < 0 || mSharedMemoryIndex >= MAX_SHARED_MEMORIES) {
110            ALOGE("invalid mSharedMemoryIndex = %d", mSharedMemoryIndex);
111            return AAUDIO_ERROR_INTERNAL;
112        }
113    }
114    return AAUDIO_OK;
115}
116
117void SharedRegionParcelable::dump() {
118    ALOGD("mSizeInBytes = %d -----", mSizeInBytes);
119    if (mSizeInBytes > 0) {
120        ALOGD("mSharedMemoryIndex = %d", mSharedMemoryIndex);
121        ALOGD("mOffsetInBytes = %d", mOffsetInBytes);
122    }
123}
124