[Spice-devel] [PATCH spice-server 1/2] Introduce a macro to help declaring new GObject

[Frediano Ziglio]

> 
> How does this relate to G_DECLARE_DERIVABLE_TYPE/G_DECLARE_FINAL_TYPE?
> 

Similar but for any type, kind of declare version for G_DEFINE_TYPE.

Why did I choose a GOBJECT_ prefix I don't know...

Frediano

> On Mon, Sep 04, 2017 at 05:09:22PM +0100, Frediano Ziglio wrote:
> > The macro will implement most of the boilerplate needed
> > to declare an object.
> > 
> > Signed-off-by: Frediano Ziglio <fziglio at redhat.com>
> > ---
> >  server/red-common.h | 34 ++++++++++++++++++++++++++++++++++
> >  1 file changed, 34 insertions(+)
> > 
> > diff --git a/server/red-common.h b/server/red-common.h
> > index 9ff1fd9b..7f60e228 100644
> > --- a/server/red-common.h
> > +++ b/server/red-common.h
> > @@ -93,4 +93,38 @@ typedef struct GListIter {
> >  #define GLIST_FOREACH_REVERSED(_list, _type, _data) \
> >      GLIST_FOREACH_GENERIC(_list, G_PASTE(_iter_, __LINE__), _type, _data,
> >      prev)
> >  
> > +/* Helper to declare a GObject type
> > + *
> > + * @_type     type identifier like MyObject
> > + * @_prefix   method prefix like my_object (no need to add the
> > + *            underscore)
> > + * @_macro    macro common part like MY_OBJECT
> > + * @_struct   used to specify the structure type in case is not
> > + *            the same as the @_type. For instance can be
> > + *            "struct MyOjectDefinition"
> > + */
> > +#define GOBJECT_DECLARE_TYPE_STRUCT(_type, _prefix, _macro, _struct) \
> > +    typedef _struct _type; \
> > +    typedef struct _type ## Class _type ## Class; \
> > +    typedef struct _type ## Private _type ## Private; \
> > +    GType _prefix ## _get_type(void) G_GNUC_CONST; \
> > +    static inline _type *_macro(void *obj) \
> > +    { return G_TYPE_CHECK_INSTANCE_CAST(obj, _prefix ## _get_type(),
> > _type); } \
> > +    static inline _type ## Class *_macro ## _CLASS(void *klass) \
> > +    { return G_TYPE_CHECK_CLASS_CAST(klass, _prefix ## _get_type(), _type
> > ## Class); } \
> > +    static inline gboolean IS_ ## _macro(void *obj) \
> > +    { return G_TYPE_CHECK_INSTANCE_TYPE(obj, _prefix ## _get_type()); } \
> > +    static inline gboolean IS_ ## _macro ## _CLASS(void *klass) \
> > +    { return G_TYPE_CHECK_CLASS_TYPE((klass), _prefix ## _get_type()); } \
> > +    static inline _type ## Class *_macro ## _GET_CLASS(void *obj) \
> > +    { return G_TYPE_INSTANCE_GET_CLASS(obj, _prefix ## _get_type(), _type
> > ## Class); }
> > +
> > +/* Helper to declare a GObject type
> > + *
> > + * Same as GOBJECT_DECLARE_TYPE_STRUCT but the structure is the same
> > + * as the type, most declarations use this convention.
> > + */
> > +#define GOBJECT_DECLARE_TYPE(_type, _prefix, _macro) \
> > +    GOBJECT_DECLARE_TYPE_STRUCT(_type, _prefix, _macro, struct _type)
> > +
> >  #endif /* RED_COMMON_H_ */