PluginLoader.hpp

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#ifndef PLUGIN_LOADER_HPP
#define PLUGIN_LOADER_HPP
 
#include <string>
#include <stdexcept>
#include <map>
#include <dlfcn.h>
 
namespace wbc {
 
class PluginLoader{
public:
    typedef std::map<std::string, void*> PluginMap;
 
    static void loadPlugin(const std::string& name){
        void *handle = dlopen(std::string(name).c_str(), RTLD_NOW);
        if(!handle)
            throw std::runtime_error("Failed to load plugin " + name);
        getPluginMap()->insert(std::make_pair(name, handle));
    }
 
    static void unloadPlugin(const std::string& name){
        PluginMap::iterator it = getPluginMap()->find(name);
        if(it == getPluginMap()->end())
            throw std::runtime_error("Failed to unload plugin " + name + ". Is the plugin loaded?");
        dlclose(it->second);
        plugin_map->erase(name);
    }
 
    static PluginMap *getPluginMap(){
        if(!plugin_map)
            plugin_map = new PluginMap;
        return plugin_map;
    }
private:
    static PluginMap* plugin_map;
};
 
}
 
#endif