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/*
* pluginmanager.hpp
*
* Copyright 2009 Max Christian Pohle <coderz@gmx.de>
*
* This program 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#ifndef pluginmanager
#define pluginmanager
#define PLUGIN_ENGINE_VERSION 1
#include <string>
#include <map>
#include <sstream>
#include <dlfcn.h>
#include <iostream>
#include <list>
#include "plugins/plugin.hpp"
using namespace std;
template <class T>
class PluginManager
{
private:
int engine_version;
typedef T create();
map<string,create*> plugins;
typename map<string, create*>::iterator iter;
public:
PluginManager<T>() : engine_version(PLUGIN_ENGINE_VERSION) {}
T get_instance(string t)
{
iter = plugins.find(t);
if (iter != plugins.end())
{ return iter->second(); }
}
list<string> list_plugins()
{
list<string> retval;
for(iter=plugins.begin(); iter!=plugins.end(); ++iter)
{ retval.push_front(iter->first); }
return retval;
}
void load_plugin(string filename)
{
std::stringstream serr;
char* dlsym_error;
std::cerr << "\n> OPENING " << filename << "...";
void* plugin2open = dlopen(filename.c_str(), RTLD_LAZY);
if (dlsym_error = dlerror())
{
std::stringstream a;
a <<
std::string(filename) <<
std::string(" is not a valid plugin\n\t") <<
std::string(dlsym_error);
throw (char*) a.str().c_str();
}
else
{
std::cerr << "done.\n";
}
create* f_creator = (create*) dlsym(plugin2open, "create");
if (dlsym_error = dlerror())
{
throw (char*)"plugin has no creation-interface"
", so is obviously no subclass of 'Plugin'";
}
else
{
std::cout << "> LOADING " << filename << "...";
plugins.insert(make_pair(filename, f_creator));
std::cout << "done.\n";
}
}
};
#endif
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