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 <string> 20 21 namespace OHOS { 22 namespace CameraStandard { 23 using namespace std; 24 25 const std::string MEDIA_LIB_SO = "libcamera_dynamic_medialibrary.z.so"; 26 const std::string PICTURE_SO = "libcamera_dynamic_picture.z.so"; 27 const std::string AV_CODEC_SO = "libcamera_dynamic_avcodec.z.so"; 28 const std::string MOVING_PHOTO_SO = "libcamera_dynamic_moving_photo.z.so"; 29 const std::string MEDIA_MANAGER_SO = "libcamera_dynamic_media_manager.z.so"; 30 const std::string NAPI_EXT_SO = "libcamera_napi_ex.z.so"; 31 32 constexpr uint32_t LIB_DELAYED_UNLOAD_TIME = 30000; // 30 second 33 34 class Dynamiclib { 35 public: 36 explicit Dynamiclib(const std::string& libName); 37 ~Dynamiclib(); 38 bool IsLoaded(); 39 void* GetFunction(const std::string& functionName); 40 41 private: 42 std::string libName_; 43 void* libHandle_ = nullptr; 44 }; 45 46 class CameraDynamicLoader { 47 public: 48 static std::shared_ptr<Dynamiclib> GetDynamiclib(const std::string& libName); 49 static void LoadDynamiclibAsync(const std::string& libName); 50 static void FreeDynamicLibDelayed(const std::string& libName, uint32_t delayMs = LIB_DELAYED_UNLOAD_TIME); 51 52 private: 53 explicit CameraDynamicLoader() = delete; 54 CameraDynamicLoader(const CameraDynamicLoader&) = delete; 55 CameraDynamicLoader& operator=(const CameraDynamicLoader&) = delete; 56 57 static void FreeDynamiclibNoLock(const std::string& libName); 58 static void CancelFreeDynamicLibDelayed(const std::string& libName); 59 static std::shared_ptr<Dynamiclib> GetDynamiclibNoLock(const std::string& libName); 60 }; 61 62 } // namespace CameraStandard 63 } // namespace OHOS 64 #endif // OHOS_CAMERA_DYNAMIC_LOADER_H