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| 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 /qobject/qobject.c | |
| parent | 46cfbf13b06d551072ed17fbfca67c103edf814f (diff) | |
| download | focaccia-qemu-7ee9edfdb117da47c86c9764d90f0be11a648666.tar.gz focaccia-qemu-7ee9edfdb117da47c86c9764d90f0be11a648666.zip | |
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 'qobject/qobject.c')
| -rw-r--r-- | qobject/qobject.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/qobject/qobject.c b/qobject/qobject.c index 23600aa1c1..87649c5be5 100644 --- a/qobject/qobject.c +++ b/qobject/qobject.c @@ -16,6 +16,15 @@ #include "qapi/qmp/qlist.h" #include "qapi/qmp/qstring.h" +QEMU_BUILD_BUG_MSG( + offsetof(QNull, base) != 0 || + offsetof(QNum, base) != 0 || + offsetof(QString, base) != 0 || + offsetof(QDict, base) != 0 || + offsetof(QList, base) != 0 || + offsetof(QBool, base) != 0, + "base qobject must be at offset 0"); + static void (*qdestroy[QTYPE__MAX])(QObject *) = { [QTYPE_NONE] = NULL, /* No such object exists */ [QTYPE_QNULL] = NULL, /* qnull_ is indestructible */ |