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

[Christophe Fergeau]

How does this relate to G_DECLARE_DERIVABLE_TYPE/G_DECLARE_FINAL_TYPE?

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_ */
> -- 
> 2.13.5
> 
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