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 #ifndef OHOS_CAMERA_DYNAMIC_LOADER_H
17 #define OHOS_CAMERA_DYNAMIC_LOADER_H
18 
19 #include <map>
20 #include <memory>
21 #include <mutex>
22 #include <string>
23 
24 namespace OHOS {
25 namespace CameraStandard {
26 using namespace std;
27 
28 const std::string MEDIA_LIB_SO = "libcamera_dynamic_medialibrary.z.so";
29 
30 class CameraDynamicLoader {
31 public:
GetInstance()32     static CameraDynamicLoader* GetInstance()
33     {
34         std::call_once(onceFlag, []() { instance.reset(new CameraDynamicLoader()); });
35         return instance.get();
36     };
37     ~CameraDynamicLoader();
38 
39     void* OpenDynamicHandle(std::string dynamicLibrary);
40     void CloseDynamicHandle(std::string dynamicLibrary);
41     void* GetFunction(std::string dynamicLibrary, std::string function);
EndsWith(const std::string & str,const std::string & suffix)42     inline bool EndsWith(const std::string& str, const std::string& suffix)
43     {
44         if (str.length() >= suffix.length()) {
45             return str.compare(str.length() - suffix.length(), suffix.length(), suffix) == 0;
46         }
47         return false;
48     }
49 
50 private:
51     CameraDynamicLoader(const CameraDynamicLoader&) = delete;
52     CameraDynamicLoader& operator=(const CameraDynamicLoader&) = delete;
53     static std::unique_ptr<CameraDynamicLoader> instance;
54     static std::once_flag onceFlag;
55     CameraDynamicLoader();
56     std::map<std::string, void *> dynamicLibHandle_;
57     std::recursive_mutex libLock_;
58 };
59 
60 }  // namespace Camera
61 }  // namespace OHOS
62 #endif // OHOS_CAMERA_DYNAMIC_LOADER_H