126 lines
2.3 KiB
C++
126 lines
2.3 KiB
C++
/*
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* Operation System Shared Linkage Library Wrapper Implementation
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* Copyright(C) 2003 Jinhao
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*
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*
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* @file: nana/system/shared_wrapper.cpp
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*/
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#include <nana/system/shared_wrapper.hpp>
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#include <algorithm>
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#include <iterator>
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#if defined(NANA_POSIX)
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#include <dlfcn.h>
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#else
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#include <windows.h>
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#endif
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namespace nana
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{
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namespace system
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{
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namespace detail
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{
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namespace shared_helper
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{
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module_t open(const char* filename)
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{
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#if defined(NANA_POSIX)
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return ::dlopen(filename, RTLD_LAZY);
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#else
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return ::LoadLibraryA(filename);
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#endif
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}
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void* symbols(module_t handle, const char* symbol)
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{
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#if defined(NANA_POSIX)
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return ::dlsym(handle, const_cast<char*>(symbol));
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#else
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return (void*)(::GetProcAddress(reinterpret_cast<HMODULE>(handle), symbol));
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#endif
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}
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void close(module_t handle)
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{
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#if defined(NANA_POSIX)
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::dlclose(handle);
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#else
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::FreeLibrary(reinterpret_cast<HMODULE>(handle));
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#endif
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}
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} //end namespace shared_helper
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}//end namespace detail
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shared_wrapper::impl_type::impl_type()
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{}
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//class shared_wrapper
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shared_wrapper::shared_wrapper()
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{}
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shared_wrapper::shared_wrapper(const char* filename)
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{
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this->open(filename);
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}
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shared_wrapper::~shared_wrapper()
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{
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this->close();
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}
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bool shared_wrapper::open(const char* filename)
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{
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this->close();
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if(filename)
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{
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std::string file;
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std::string ofn = filename;
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std::string::size_type length = ofn.length();
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if(length > 13)
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{
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std::transform(filename + length - 13, filename + length , std::back_inserter(file), tolower);
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if(file == ".nana_shared")
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{
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#if defined(NANA_POSIX)
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ofn.replace(length - 13, 13, ".so");
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#else
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ofn.replace(length - 13, 13, ".DLL");
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#endif
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filename = ofn.c_str();
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}
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}
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impl_.handle = detail::shared_helper::open(filename);
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}
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return (impl_.handle != 0);
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}
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void shared_wrapper::close()
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{
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if(impl_.handle)
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{
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detail::shared_helper::close(impl_.handle);
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impl_.symbol = "";
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impl_.proc_address = 0;
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impl_.handle = 0;
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}
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}
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bool shared_wrapper::empty() const
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{
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return (impl_.handle == 0);
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}
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//end class shared_wrapper
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}//end namespace system
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}//end namespace nana
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