mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
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139 lines
2.6 KiB
C++
139 lines
2.6 KiB
C++
/** Loadable / plugin support.
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*
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* @file
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @author Daniel Krebs <github@daniel-krebs.net>
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* @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
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*
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* VILLAScommon
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************************/
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#pragma once
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#include <list>
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#include <string>
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#include <jansson.h>
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#include <villas/log.hpp>
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#include <villas/common.hpp>
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namespace villas {
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namespace plugin {
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/* Forward declarations */
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class Plugin;
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template<typename T = Plugin>
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using List = std::list<T *>;
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class Registry {
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protected:
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static List<> *plugins;
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public:
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static Logger
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getLogger()
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{
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return logging.get("plugin:registry");
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}
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static void add(Plugin *p)
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{
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if (plugins == nullptr)
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plugins = new List<>;
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plugins->push_back(p);
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}
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static void remove(Plugin *p)
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{
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plugins->remove(p);
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}
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template<typename T = Plugin>
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static T *
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lookup(const std::string &name)
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{
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for (Plugin *p : *plugins) {
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T *t = dynamic_cast<T *>(p);
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if (!t || t->name != name)
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continue;
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return t;
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}
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return nullptr;
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}
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template<typename T = Plugin>
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static List<T>
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lookup()
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{
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List<T> list;
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for (Plugin *p : *plugins) {
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T *t = dynamic_cast<T *>(p);
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if (t)
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list.push_back(t);
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}
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return list;
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}
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};
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class Loader {
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public:
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int load(const std::string &path);
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int unload();
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virtual int parse(json_t *cfg);
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};
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class Plugin {
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friend plugin::Registry;
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public:
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Plugin(const std::string& name, const std::string &desc);
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virtual ~Plugin();
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// copying a plugin doesn't make sense, so explicitly deny it
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Plugin(Plugin const&) = delete;
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void operator=(Plugin const&) = delete;
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virtual void dump();
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const std::string & getName() const;
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const std::string & getDescription() const;
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protected:
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std::string name;
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std::string description;
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std::string path;
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Logger
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getLogger()
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{
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return logging.get("plugin:" + name);
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}
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};
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} /* namespace plugin */
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} /* namespace villas */
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