On 2020-06-24 at 15:10 CEST, Gerd Hoffmann wrote...
> Little helper function to load modules on demand. In most cases adding
> module loading support for devices and other objects is just
> s/object_class_by_name/module_object_class_by_name/ in the right spot.
>
> Signed-off-by: Gerd Hoffmann <kra...@redhat.com>
> ---
> include/qom/object.h | 12 ++++++++++++
> qom/object.c | 14 ++++++++++++++
> 2 files changed, 26 insertions(+)
>
> diff --git a/include/qom/object.h b/include/qom/object.h
> index 94a61ccc3fe8..51f188137f1f 100644
> --- a/include/qom/object.h
> +++ b/include/qom/object.h
> @@ -994,6 +994,18 @@ bool object_class_is_abstract(ObjectClass *klass);
> */
> ObjectClass *object_class_by_name(const char *typename);
>
> +/**
> + * module_object_class_by_name:
> + * @typename: The QOM typename to obtain the class for.
> + *
> + * For objects which might be provided by a module. Behaves like
> + * object_class_by_name, but additionally tries to load the module
> + * needed in case the class is not available.
> + *
> + * Returns: The class for @typename or %NULL if not found.
> + */
> +ObjectClass *module_object_class_by_name(const char *typename);
> +
> void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque),
> const char *implements_type, bool include_abstract,
> void *opaque);
> diff --git a/qom/object.c b/qom/object.c
> index 6ece96bc2bfc..34daaf1280f5 100644
> --- a/qom/object.c
> +++ b/qom/object.c
> @@ -985,6 +985,20 @@ ObjectClass *object_class_by_name(const char *typename)
> return type->class;
> }
>
> +ObjectClass *module_object_class_by_name(const char *typename)
Re-reading this, it occurred to me that typename is a keyword in C++.
I don't know if we want to make it a rule to not use C++ keywords just in
case we would some day compile that code with a C++ compiler.
> +{
> + ObjectClass *oc;
> +
> + oc = object_class_by_name(typename);
> +#ifdef CONFIG_MODULES
> + if (!oc) {
> + module_load_qom_one(typename);
> + oc = object_class_by_name(typename);
> + }
> +#endif
> + return oc;
> +}
> +
> ObjectClass *object_class_get_parent(ObjectClass *class)
> {
> TypeImpl *type = type_get_parent(class->type);
--
Cheers,
Christophe de Dinechin (IRC c3d)
