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qdev: move DO_UPCAST() into osdep.h

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Nothing qdev specific about this, make it available throughtout.

Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Mark McLoughlin 2009-11-25 18:49:03 +00:00 committed by Anthony Liguori
parent 45460d1a53
commit 5096fae3fd
2 changed files with 10 additions and 10 deletions
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10
hw/qdev.h
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@ -154,16 +154,6 @@ CharDriverState *qdev_init_chardev(DeviceState *dev);
BusState *qdev_get_parent_bus(DeviceState *dev);
/* Convert from a base type to a parent type, with compile time checking. */
#ifdef __GNUC__
#define DO_UPCAST(type, field, dev) ( __extension__ ( { \
char __attribute__((unused)) offset_must_be_zero[ \
-offsetof(type, field)]; \
container_of(dev, type, field);}))
#else
#define DO_UPCAST(type, field, dev) container_of(dev, type, field)
#endif
/*** BUS API. ***/
void qbus_create_inplace(BusState *bus, BusInfo *info,

10
osdep.h
View File

@ -37,6 +37,16 @@
(type *) ((char *) __mptr - offsetof(type, member));})
#endif
/* Convert from a base type to a parent type, with compile time checking. */
#ifdef __GNUC__
#define DO_UPCAST(type, field, dev) ( __extension__ ( { \
char __attribute__((unused)) offset_must_be_zero[ \
-offsetof(type, field)]; \
container_of(dev, type, field);}))
#else
#define DO_UPCAST(type, field, dev) container_of(dev, type, field)
#endif
#define typeof_field(type, field) typeof(((type *)0)->field)
#define type_check(t1,t2) ((t1*)0 - (t2*)0)