pxcloud/spice-protocol
5
0
Fork 0
mirror of https://gitlab.uni-freiburg.de/opensourcevdi/spice-protocol synced 2025-12-29 00:41:31 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

macros: make SPICE_CONTAINEROF more typesafe

Browse Source 
Check the pointer given is the same type as member pointer.

Signed-off-by: Frediano Ziglio <fziglio@redhat.com>
Acked-by: Jonathon Jongsma <jjongsma@redhat.com>
This commit is contained in:
Frediano Ziglio 2015-12-03 15:24:58 +00:00
parent 95b5617874
commit cffb8baee1
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
spice/macros.h
View File

@ -143,8 +143,14 @@
((long) ((uint8_t*) &((struct_type*) 0)->member))
#endif
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
#define SPICE_CONTAINEROF(ptr, struct_type, member) ({ \
const typeof( ((struct_type *)0)->member ) *__mptr = (ptr); \
((struct_type *)(void *)((uint8_t *)(__mptr) - SPICE_OFFSETOF(struct_type, member))); })
#else
#define SPICE_CONTAINEROF(ptr, struct_type, member) \
((struct_type *)(void *)((uint8_t *)(ptr) - SPICE_OFFSETOF(struct_type, member)))
#endif
#define SPICE_MEMBER_P(struct_p, struct_offset) \
((gpointer) ((guint8*) (struct_p) + (glong) (struct_offset)))