diff options
| author | Marc-André Lureau <marcandre.lureau@redhat.com> | 2018-04-19 17:01:41 +0200 |
|---|---|---|
| committer | Markus Armbruster <armbru@redhat.com> | 2018-05-04 08:27:53 +0200 |
| commit | 7ee9edfdb117da47c86c9764d90f0be11a648666 (patch) | |
| tree | 76e597b01b87fa5c6707e6f6410cb347fefbb0b3 /include/qapi | |
| parent | 46cfbf13b06d551072ed17fbfca67c103edf814f (diff) | |
qobject: Ensure base is at offset 0
All QObject types have the base QObject as their first field. This
allows the simplification of qobject_to().
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180419150145.24795-2-marcandre.lureau@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Commit message paragraph on type casts dropped, to avoid giving the
impression type casting would be okay]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Diffstat (limited to 'include/qapi')
| -rw-r--r-- | include/qapi/qmp/qobject.h | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/include/qapi/qmp/qobject.h b/include/qapi/qmp/qobject.h index e022707578..5206ff9ee1 100644 --- a/include/qapi/qmp/qobject.h +++ b/include/qapi/qmp/qobject.h @@ -61,9 +61,8 @@ struct QObject { QEMU_BUILD_BUG_MSG(QTYPE__MAX != 7, "The QTYPE_CAST_TO_* list needs to be extended"); -#define qobject_to(type, obj) ({ \ - QObject *_tmp = qobject_check_type(obj, glue(QTYPE_CAST_TO_, type)); \ - _tmp ? container_of(_tmp, type, base) : (type *)NULL; }) +#define qobject_to(type, obj) \ + ((type *)qobject_check_type(obj, glue(QTYPE_CAST_TO_, type))) /* Initialize an object to default values */ static inline void qobject_init(QObject *obj, QType type) |