Function cb

src/platform/linux/audio.cpp:136–142

    template<class T>
    void cb(ctx_t::pointer ctx, add_const_t<T> i, void *userdata) {
      auto &f = *(cb_simple_t<T> *) userdata;

      // Cannot similarly filter on eol here. Unless reported otherwise assume
      // we have no need for special filtering like cb?
      f(ctx, i);
    }

    template<class T>
    using cb_t = std::function<void(ctx_t::pointer, add_const_t<T> i, int eol)>;