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| author | Marc-André Lureau | 2018-04-19 17:01:42 +0200 |
|---|---|---|
| committer | Markus Armbruster | 2018-05-04 08:27:53 +0200 |
| commit | 3d3eacaeccaab718ea0e2ddaa578bfae9e311c59 (patch) | |
| tree | e0f8f345f94f9de6b203da0e4a8ff06b23e4c5ae /qom | |
| parent | qobject: Ensure base is at offset 0 (diff) | |
| download | qemu-3d3eacaeccaab718ea0e2ddaa578bfae9e311c59.tar.gz qemu-3d3eacaeccaab718ea0e2ddaa578bfae9e311c59.tar.xz qemu-3d3eacaeccaab718ea0e2ddaa578bfae9e311c59.zip | |
qobject: use a QObjectBase_ struct
By moving the base fields to a QObjectBase_, QObject can be a type
which also has a 'base' field. This allows writing a generic QOBJECT()
macro that will work with any QObject type, including QObject
itself. The container_of() macro ensures that the object to cast has a
QObjectBase_ base field, giving some type safety guarantees. QObject
must have no members but QObjectBase_ base, or else QOBJECT() breaks.
QObjectBase_ is not a typedef and uses a trailing underscore to make
it obvious it is not for normal use and to avoid potential abuse.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180419150145.24795-3-marcandre.lureau@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Diffstat (limited to 'qom')
0 files changed, 0 insertions, 0 deletions