toast/static_init_protected.hpp

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#ifndef toast_static_init_protected_hpp_INCLUDED
#define toast_static_init_protected_hpp_INCLUDED

namespace toast {
namespace detail {

template<class T, class unique_id>
class static_init_protected
{
public:
        static T& get()
        {
                (void)private_guaranteed_init_hook_;

                // C++ standard says function local statics are destroyed
                // in the reverse order of the completion of their constructors,
                // so we shouldn't have to worry about dependencies.
                static T the_object;
                return the_object;
        }
        
private:
        static_init_protected();

        static bool private_guaranteed_init_hook_;
};

template<class T, class unique_id>
bool static_init_protected<T, unique_id>::private_guaranteed_init_hook_ =
        (static_init_protected<T, unique_id>::get(), true);

}
}

#define TOAST_STATIC_INIT_PROTECTED(T, name)                                                    \
        struct private_dummy_toast_detail_nested_type_##name##__ {}; \
        typedef toast::detail::static_init_protected<T, private_dummy_toast_detail_nested_type_##name##__> name

#endif

---