diff options
Diffstat (limited to 'include/compiler.h')
| -rw-r--r-- | include/compiler.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/compiler.h b/include/compiler.h index 4ce60ccc..7beeb8fe 100644 --- a/include/compiler.h +++ b/include/compiler.h @@ -180,6 +180,13 @@ typedef enum bool { false, true } bool; # define offsetof(t,m) ((size_t)&(((t *)0)->m)) #endif +/* This is like offsetof(), but takes an object rather than a type. + Ironically enough this is actually guaranteed to be portable, + as far as I know... */ +#ifndef offsetin +# define offsetin(p,m) ((const char *)&((p).m) - (const char *)&(p)) +#endif + /* The container_of construct: if p is a pointer to member m of container class c, then return a pointer to the container of which *p is a member. */ |