systemDynamicFactory.h

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#pragma once
 
// gemc
#include "goptions.h"
#include "gbase.h"
 
// system plugin factory
// this file is kept here in case in the future we'll need a gsystem plugin
 
class GSystemDynamicFactory : public GBase<GSystemDynamicFactory>
{
public:
    virtual void loadSystem(GSystem* s, int verbosity) = 0;
 
    virtual ~GSystemDynamicFactory() = default;
 
    static GSystemDynamicFactory* instantiate(const dlhandle h, std::shared_ptr<GOptions> g) {
        if (!h) return nullptr;
        using fptr = GSystemDynamicFactory* (*)(std::shared_ptr<GOptions>);
 
        // Must match the extern "C" declaration in the derived factories.
        auto sym = dlsym(h, "GSystemDynamicFactory");
        if (!sym) return nullptr;
 
        auto func = reinterpret_cast<fptr>(sym);
        return func(g);
    }
};