diff options
Diffstat (limited to 'qemu/include/qemu/compiler.h')
| -rw-r--r-- | qemu/include/qemu/compiler.h | 40 |
1 files changed, 36 insertions, 4 deletions
diff --git a/qemu/include/qemu/compiler.h b/qemu/include/qemu/compiler.h index df9dd514f..8f1cc7ba6 100644 --- a/qemu/include/qemu/compiler.h +++ b/qemu/include/qemu/compiler.h @@ -3,7 +3,6 @@ #ifndef COMPILER_H #define COMPILER_H -#include "config-host.h" /*---------------------------------------------------------------------------- | The macro QEMU_GNUC_PREREQ tests for minimum version of the GNU C compiler. @@ -42,10 +41,43 @@ # define QEMU_PACKED __attribute__((packed)) #endif -#define cat(x,y) x ## y -#define cat2(x,y) cat(x,y) +#ifndef glue +#define xglue(x, y) x ## y +#define glue(x, y) xglue(x, y) +#define stringify(s) tostring(s) +#define tostring(s) #s +#endif + +#ifndef likely +#if __GNUC__ < 3 +#define __builtin_expect(x, n) (x) +#endif + +#define likely(x) __builtin_expect(!!(x), 1) +#define unlikely(x) __builtin_expect(!!(x), 0) +#endif + +#ifndef container_of +#define container_of(ptr, type, member) ({ \ + const typeof(((type *) 0)->member) *__mptr = (ptr); \ + (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) + #define QEMU_BUILD_BUG_ON(x) \ - typedef char cat2(qemu_build_bug_on__,__LINE__)[(x)?-1:1] __attribute__((unused)); + typedef char glue(qemu_build_bug_on__,__LINE__)[(x)?-1:1] __attribute__((unused)); #if defined __GNUC__ # if !QEMU_GNUC_PREREQ(4, 4) |