1 /*
2 * Copyright (c) 2022-2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "dcamera_buffer_handle.h"
17
18 #include <cerrno>
19 #include <cstddef>
20 #include <string>
21 #include <sys/mman.h>
22
23 #include "distributed_hardware_log.h"
24
25 namespace OHOS {
26 namespace DistributedHardware {
DCameraMemoryMap(const BufferHandle * buffer)27 void* DCameraMemoryMap(const BufferHandle *buffer)
28 {
29 if (buffer == nullptr) {
30 DHLOGE("mmap the buffer handle is NULL");
31 return nullptr;
32 }
33
34 void* virAddr = mmap(NULL, buffer->size, PROT_READ | PROT_WRITE, MAP_SHARED, buffer->fd, 0);
35 if (virAddr == MAP_FAILED) {
36 DHLOGE("mmap failed errno %{public}s, fd : %{public}d", strerror(errno), buffer->fd);
37 return nullptr;
38 }
39 return virAddr;
40 }
41
DCameraMemoryUnmap(BufferHandle * buffer)42 void DCameraMemoryUnmap(BufferHandle *buffer)
43 {
44 if (buffer == nullptr) {
45 DHLOGE("unmmap the buffer handle is NULL");
46 return;
47 }
48 if (buffer->virAddr != nullptr) {
49 int ret = munmap(buffer->virAddr, buffer->size);
50 if (ret != 0) {
51 DHLOGE("munmap failed err: %{public}s", strerror(errno));
52 }
53 }
54 buffer->virAddr = nullptr;
55 }
56 } // namespace DistributedHardware
57 } // namespace OHOS