/* * Dynamically Loaded Object * (C) 2010 Jack Lloyd * * Botan is released under the Simplified BSD License (see license.txt) */ #include #include #include #if defined(BOTAN_TARGET_OS_HAS_DLOPEN) #include #elif defined(BOTAN_TARGET_OS_HAS_LOADLIBRARY) #define NOMINMAX 1 #define _WINSOCKAPI_ // stop windows.h including winsock.h #include #endif namespace Botan { namespace { void raise_runtime_loader_exception(const std::string& lib_name, const char* msg) { throw Exception("Failed to load " + lib_name + ": " + (msg ? msg : "Unknown error")); } } Dynamically_Loaded_Library::Dynamically_Loaded_Library( const std::string& library) : m_lib_name(library), m_lib(nullptr) { #if defined(BOTAN_TARGET_OS_HAS_DLOPEN) m_lib = ::dlopen(m_lib_name.c_str(), RTLD_LAZY); if(!m_lib) raise_runtime_loader_exception(m_lib_name, dlerror()); #elif defined(BOTAN_TARGET_OS_HAS_LOADLIBRARY) m_lib = ::LoadLibraryA(m_lib_name.c_str()); if(!m_lib) raise_runtime_loader_exception(m_lib_name, "LoadLibrary failed"); #endif if(!m_lib) raise_runtime_loader_exception(m_lib_name, "Dynamic load not supported"); } Dynamically_Loaded_Library::~Dynamically_Loaded_Library() { #if defined(BOTAN_TARGET_OS_HAS_DLOPEN) ::dlclose(m_lib); #elif defined(BOTAN_TARGET_OS_HAS_LOADLIBRARY) ::FreeLibrary((HMODULE)m_lib); #endif } void* Dynamically_Loaded_Library::resolve_symbol(const std::string& symbol) { void* addr = nullptr; #if defined(BOTAN_TARGET_OS_HAS_DLOPEN) addr = ::dlsym(m_lib, symbol.c_str()); #elif defined(BOTAN_TARGET_OS_HAS_LOADLIBRARY) addr = reinterpret_cast(::GetProcAddress((HMODULE)m_lib, symbol.c_str())); #endif if(!addr) throw Exception("Failed to resolve symbol " + symbol + " in " + m_lib_name); return addr; } }