diff options
Diffstat (limited to 'include/qapi/qmp/qobject.h')
| -rw-r--r-- | include/qapi/qmp/qobject.h | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/include/qapi/qmp/qobject.h b/include/qapi/qmp/qobject.h index 5206ff9ee1..a713c0165b 100644 --- a/include/qapi/qmp/qobject.h +++ b/include/qapi/qmp/qobject.h @@ -34,13 +34,21 @@ #include "qapi/qapi-builtin-types.h" -struct QObject { +/* Not for use outside include/qapi/qmp/ */ +struct QObjectBase_ { QType type; size_t refcnt; }; -/* Get the 'base' part of an object */ -#define QOBJECT(obj) (&(obj)->base) +/* this struct must have no other members than base */ +struct QObject { + struct QObjectBase_ base; +}; + +#define QOBJECT(obj) ({ \ + typeof(obj) _obj = (obj); \ + _obj ? container_of(&(_obj)->base, QObject, base) : NULL; \ +}) /* High-level interface for qobject_incref() */ #define QINCREF(obj) \ @@ -68,8 +76,8 @@ QEMU_BUILD_BUG_MSG(QTYPE__MAX != 7, static inline void qobject_init(QObject *obj, QType type) { assert(QTYPE_NONE < type && type < QTYPE__MAX); - obj->refcnt = 1; - obj->type = type; + obj->base.refcnt = 1; + obj->base.type = type; } /** @@ -77,8 +85,9 @@ static inline void qobject_init(QObject *obj, QType type) */ static inline void qobject_incref(QObject *obj) { - if (obj) - obj->refcnt++; + if (obj) { + obj->base.refcnt++; + } } /** @@ -101,8 +110,8 @@ void qobject_destroy(QObject *obj); */ static inline void qobject_decref(QObject *obj) { - assert(!obj || obj->refcnt); - if (obj && --obj->refcnt == 0) { + assert(!obj || obj->base.refcnt); + if (obj && --obj->base.refcnt == 0) { qobject_destroy(obj); } } @@ -112,8 +121,8 @@ static inline void qobject_decref(QObject *obj) */ static inline QType qobject_type(const QObject *obj) { - assert(QTYPE_NONE < obj->type && obj->type < QTYPE__MAX); - return obj->type; + assert(QTYPE_NONE < obj->base.type && obj->base.type < QTYPE__MAX); + return obj->base.type; } /** |