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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2013, 2019 Sadie Powell <sadie@witchery.services>
* Copyright (C) 2012 Robby <robby@chatbelgie.be>
* Copyright (C) 2012 ChrisTX <xpipe@hotmail.de>
* Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2007 Oliver Lupton <om@inspircd.org>
* Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
* Copyright (C) 2006 Craig Edwards <brain@inspircd.org>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
/** The DLLManager class is able to load a module file by filename,
* and locate its init_module symbol.
*/
class CoreExport DLLManager : public classbase
{
private:
/** The last error string. */
std::string err;
/** The module library handle. */
#ifdef _WIN32
HMODULE lib;
#else
void* lib;
#endif
/** The filename of the module library. */
const std::string libname;
/** Sets the last error string. */
void RetrieveLastError();
public:
/** Attempts to load the specified module.
* @param name The name of the library to load.
*/
DLLManager(const std::string& name);
/** Unloads the module if one was loaded. */
~DLLManager();
/** Attempts to create a new module instance from this shared library.
* @return Either a new instance of the Module class or NULL on error.
*/
Module* CallInit();
/** Retrieves the value of the specified symbol.
* @param name The name of the symbol to retrieve.
* @return Either the value of the specified symbol or or NULL if it does not exist.
*/
void* GetSymbol(const char* name) const;
/** Retrieves the value of the specified symbol and casts it to the requested type.
* @param name The name of the symbol to retrieve.
* @return Either the value of the specified symbol or or NULL if it does not exist.
*/
template <typename TReturn>
TReturn* GetSymbol(const char* name) const
{
return static_cast<TReturn*>(GetSymbol(name));
}
/** Retrieves the module version from the dynamic library. */
const char* GetVersion() const { return GetSymbol<const char>(MODULE_STR_VERSION); }
/** Retrieves the last error which occurred or an empty string if no errors have occurred. */
const std::string& LastError() const { return err; }
/** Retrieves the filename of the underlying shared library. */
const std::string& LibraryName() const { return libname; }
};
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