1 // Copyright 2017 The Dawn Authors 2 // 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 #ifndef COMMON_DYNAMICLIB_H_ 16 #define COMMON_DYNAMICLIB_H_ 17 18 #include "common/Assert.h" 19 20 #include <string> 21 #include <type_traits> 22 23 class DynamicLib { 24 public: 25 DynamicLib() = default; 26 ~DynamicLib(); 27 28 DynamicLib(const DynamicLib&) = delete; 29 DynamicLib& operator=(const DynamicLib&) = delete; 30 31 DynamicLib(DynamicLib&& other); 32 DynamicLib& operator=(DynamicLib&& other); 33 34 bool Valid() const; 35 36 bool Open(const std::string& filename, std::string* error = nullptr); 37 void Close(); 38 39 void* GetProc(const std::string& procName, std::string* error = nullptr) const; 40 41 template <typename T> 42 bool GetProc(T** proc, const std::string& procName, std::string* error = nullptr) const { 43 ASSERT(proc != nullptr); 44 static_assert(std::is_function<T>::value, ""); 45 46 *proc = reinterpret_cast<T*>(GetProc(procName, error)); 47 return *proc != nullptr; 48 } 49 50 private: 51 void* mHandle = nullptr; 52 }; 53 54 #endif // COMMON_DYNAMICLIB_H_ 55