1 /*
2 * Copyright (c) 2024 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 <dlfcn.h>
17 #include "camera_log.h"
18 #include "camera_dynamic_loader.h"
19
20 namespace OHOS {
21 namespace CameraStandard {
22 using namespace std;
23 const char *librarySuffix = ".so";
24 std::unique_ptr<CameraDynamicLoader> CameraDynamicLoader::instance = nullptr;
25 std::once_flag CameraDynamicLoader::onceFlag;
CameraDynamicLoader()26 CameraDynamicLoader::CameraDynamicLoader()
27 {
28 MEDIA_INFO_LOG("CameraDynamicLoader ctor");
29 }
30
~CameraDynamicLoader()31 CameraDynamicLoader::~CameraDynamicLoader()
32 {
33 MEDIA_INFO_LOG("CameraDynamicLoader dtor");
34 for (auto iterator = dynamicLibHandle_.begin(); iterator != dynamicLibHandle_.end(); ++iterator) {
35 dlclose(iterator->second);
36 MEDIA_INFO_LOG("close library camera_dynamic success: %{public}s", iterator->first.c_str());
37 }
38 }
39
OpenDynamicHandle(std::string dynamicLibrary)40 void* CameraDynamicLoader::OpenDynamicHandle(std::string dynamicLibrary)
41 {
42 CAMERA_SYNC_TRACE;
43 std::lock_guard loaderLock(libLock_);
44 if (!EndsWith(dynamicLibrary, librarySuffix)) {
45 MEDIA_ERR_LOG("CloseDynamicHandle with error name!");
46 return nullptr;
47 }
48 if (dynamicLibHandle_[dynamicLibrary] == nullptr) {
49 void* dynamicLibHandle = dlopen(dynamicLibrary.c_str(), RTLD_NOW);
50 if (dynamicLibHandle == nullptr) {
51 MEDIA_ERR_LOG("Failed to open %{public}s, reason: %{public}sn", dynamicLibrary.c_str(), dlerror());
52 return nullptr;
53 }
54 MEDIA_INFO_LOG("open library %{public}s success", dynamicLibrary.c_str());
55 dynamicLibHandle_[dynamicLibrary] = dynamicLibHandle;
56 }
57 return dynamicLibHandle_[dynamicLibrary];
58 }
59
GetFunction(std::string dynamicLibrary,std::string function)60 void* CameraDynamicLoader::GetFunction(std::string dynamicLibrary, std::string function)
61 {
62 CAMERA_SYNC_TRACE;
63 std::lock_guard loaderLock(libLock_);
64 // if not opened, then open directly
65 if (dynamicLibHandle_[dynamicLibrary] == nullptr) {
66 OpenDynamicHandle(dynamicLibrary);
67 }
68
69 void* handle = nullptr;
70 if (dynamicLibHandle_[dynamicLibrary] != nullptr) {
71 handle = dlsym(dynamicLibHandle_[dynamicLibrary], function.c_str());
72 if (handle == nullptr) {
73 MEDIA_ERR_LOG("Failed to load %{public}s, reason: %{public}sn", function.c_str(), dlerror());
74 return nullptr;
75 }
76 MEDIA_INFO_LOG("GetFunction %{public}s success", function.c_str());
77 }
78 return handle;
79 }
80
CloseDynamicHandle(std::string dynamicLibrary)81 void CameraDynamicLoader::CloseDynamicHandle(std::string dynamicLibrary)
82 {
83 CAMERA_SYNC_TRACE;
84 std::lock_guard loaderLock(libLock_);
85 if (!EndsWith(dynamicLibrary, librarySuffix)) {
86 MEDIA_ERR_LOG("CloseDynamicHandle with error name!");
87 return;
88 }
89 if (dynamicLibHandle_[dynamicLibrary] != nullptr) {
90 dlclose(dynamicLibHandle_[dynamicLibrary]);
91 dynamicLibHandle_[dynamicLibrary] = nullptr;
92 MEDIA_INFO_LOG("close library camera_dynamic success: %{public}s", dynamicLibrary.c_str());
93 }
94 }
95 } // namespace Camera
96 } // namespace OHOS