Method processModuleFile

radiantcore/modulesystem/ModuleLoader.cpp:32–96

Functor operator, gets invoked on directory traversal

// Functor operator, gets invoked on directory traversal
void ModuleLoader::processModuleFile(const fs::path& file)
{
	// Check for the correct extension of the visited file
	if (string::to_lower_copy(file.extension().string()) != MODULE_FILE_EXTENSION) return;

	std::string fullName = file.string();
	rMessage() << "ModuleLoader: Loading module '" << fullName << "'" << std::endl;

	// Skip the core module binary
	if (file.filename() == CoreModule::Filename())
	{
		return;
	}

	// Create the encapsulator class
	auto library = std::make_shared<DynamicLibrary>(fullName);

	// greebo: Try to find our entry point and invoke it and add the library to the list
	// on success. If the load fails, the shared pointer won't be added and
	// self-destructs at the end of this scope.
	if (library->failed())
	{
		rError() << "WARNING: Failed to load module " << library->getName() << ":" << std::endl;

#ifdef __linux__
		rConsoleError() << dlerror() << std::endl;
#endif
		return;
	}

	// Library was successfully loaded, lookup the symbol
	auto funcPtr = library->findSymbol(SYMBOL_REGISTER_MODULE);

	if (funcPtr == nullptr)
	{
		// Symbol lookup error
		rError() << "WARNING: Could not find symbol " << SYMBOL_REGISTER_MODULE
			<< " in module " << library->getName() << ":" << std::endl;
		return;
	}

	// Brute-force conversion of the pointer to the desired type
	auto regFunc = reinterpret_cast<RegisterModulesFunc>(funcPtr);

	try
	{
		// Call the symbol and pass a reference to the ModuleRegistry
		// This method might throw a ModuleCompatibilityException in its
		// module::performDefaultInitialisation() routine.
		regFunc(_registry);

		// Add the library to the static list (for later reference)
		_dynamicLibraryList.push_back(library);
	}
	catch (module::ModuleCompatibilityException&)
	{
		// Report this error and don't add the module to the _dynamicLibraryList
		rError() << "Compatibility mismatch loading library " << library->getName() << std::endl;