diff options
Diffstat (limited to 'osdep.h')
| -rw-r--r-- | osdep.h | 21 |
1 files changed, 16 insertions, 5 deletions
@@ -2,6 +2,7 @@ #define QEMU_OSDEP_H #include <stdarg.h> +#include <stddef.h> #ifdef __OpenBSD__ #include <sys/types.h> #include <sys/signal.h> @@ -36,6 +37,19 @@ (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) + #ifndef MIN #define MIN(a, b) (((a) < (b)) ? (a) : (b)) #endif @@ -48,12 +62,9 @@ #endif #ifndef always_inline -#if (__GNUC__ < 3) || defined(__APPLE__) -#define always_inline inline -#else -#define always_inline __attribute__ (( always_inline )) __inline__ +#if !((__GNUC__ < 3) || defined(__APPLE__)) #ifdef __OPTIMIZE__ -#define inline always_inline +#define inline __attribute__ (( always_inline )) __inline__ #endif #endif #else |