| #ifndef QPID_SYS_SHLIB_H |
| #define QPID_SYS_SHLIB_H |
| |
| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| |
| #include <boost/noncopyable.hpp> |
| #include <iostream> |
| |
| namespace qpid { |
| namespace sys { |
| |
| /** Encapsulates a shared library handle. |
| *@see AutoShlib |
| */ |
| class Shlib { |
| public: |
| /** Load a shared library */ |
| Shlib(const char* libname) { load(libname); } |
| |
| /** Load a shared library */ |
| Shlib(const std::string& libname) { load(libname.c_str()); } |
| |
| /** Unload shared library. */ |
| void unload(); |
| |
| /** Look up symbol. */ |
| void* getSymbol(const char* symbol); |
| |
| /** Look up symbol in shared library, cast it to the desired |
| * pointer type, void* by default. |
| */ |
| template <class T> |
| T getSymbol(const char* symbol) { |
| // Double cast avoids warning about casting object to function pointer |
| return reinterpret_cast<T>(reinterpret_cast<intptr_t>( |
| this->getSymbol(symbol))); |
| } |
| |
| private: |
| void* handle; |
| void load(const char* libname); |
| }; |
| |
| /** A shared library handle that unloads the shlib in it's dtor */ |
| class AutoShlib : public Shlib { |
| public: |
| /** Load shared library */ |
| AutoShlib(const std::string& libname) : Shlib(libname) {} |
| /** Calls unload() */ |
| ~AutoShlib() throw(); |
| }; |
| |
| |
| }} // namespace qpid::sys |
| |
| #endif /*!QPID_SYS_SHLIB_H*/ |