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
32 using android::NO_ERROR;
33 using android::status_t;
34 using android::Parcel;
35 using android::Parcelable;
36
37 using namespace aaudio;
38
SharedRegionParcelable()39 SharedRegionParcelable::SharedRegionParcelable() {}
~SharedRegionParcelable()40 SharedRegionParcelable::~SharedRegionParcelable() {}
41
setup(int32_t sharedMemoryIndex,int32_t offsetInBytes,int32_t sizeInBytes)42 void SharedRegionParcelable::setup(int32_t sharedMemoryIndex,
43 int32_t offsetInBytes,
44 int32_t sizeInBytes) {
45 mSharedMemoryIndex = sharedMemoryIndex;
46 mOffsetInBytes = offsetInBytes;
47 mSizeInBytes = sizeInBytes;
48 }
49
writeToParcel(Parcel * parcel) const50 status_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
64 error:
65 ALOGE("%s returning %d", __func__, status);
66 return status;
67 }
68
readFromParcel(const Parcel * parcel)69 status_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
80 error:
81 ALOGE("%s returning %d", __func__, status);
82 return status;
83 }
84
resolve(SharedMemoryParcelable * memoryParcels,void ** regionAddressPtr)85 aaudio_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
validate() const99 aaudio_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
dump()117 void SharedRegionParcelable::dump() {
118 ALOGD("mSizeInBytes = %d -----", mSizeInBytes);
119 if (mSizeInBytes > 0) {
120 ALOGD("mSharedMemoryIndex = %d", mSharedMemoryIndex);
121 ALOGD("mOffsetInBytes = %d", mOffsetInBytes);
122 }
123 }
124