diff options
Diffstat (limited to 'libdocument/ev-document.h')
-rw-r--r-- | libdocument/ev-document.h | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/libdocument/ev-document.h b/libdocument/ev-document.h index e07e3a2..7cb6d84 100644 --- a/libdocument/ev-document.h +++ b/libdocument/ev-document.h @@ -234,8 +234,38 @@ type_name##_get_type (void) } \ return g_define_type_id__volatile; \ } - +/* A convenience macro for GTypeInterface definitions, which declares + * a default vtable initialization function and defines a *_get_type() + * function. + * + * The macro expects the interface initialization function to have the + * name <literal>t_n ## _default_init</literal>, and the interface + * structure to have the name <literal>TN ## Interface</literal>. + */ +#define EV_DEFINE_INTERFACE(TypeName, type_name, TYPE_PREREQ) \ +static void type_name##_class_init (TypeName##Iface *klass); \ + \ +GType \ +type_name##_get_type (void) \ +{ \ + static volatile gsize g_define_type_id__volatile = 0; \ + if (g_once_init_enter (&g_define_type_id__volatile)) { \ + GType g_define_type_id = \ + g_type_register_static_simple (G_TYPE_INTERFACE, \ + g_intern_static_string (#TypeName), \ + sizeof (TypeName##Iface), \ + (GClassInitFunc)type_name##_class_init, \ + 0, \ + (GInstanceInitFunc)NULL, \ + (GTypeFlags) 0); \ + if (TYPE_PREREQ) \ + g_type_interface_add_prerequisite (g_define_type_id, TYPE_PREREQ); \ + g_once_init_leave (&g_define_type_id__volatile, g_define_type_id); \ + } \ + return g_define_type_id__volatile; \ +} + G_END_DECLS #endif /* EV_DOCUMENT_H */ |