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| author | dim <dim@FreeBSD.org> | 2012-04-29 11:04:31 +0000 |
|---|---|---|
| committer | dim <dim@FreeBSD.org> | 2012-04-29 11:04:31 +0000 |
| commit | 81a3e2b46db5474df3633b850805e5e981a6cbb4 (patch) | |
| tree | 698e4c5df1fba3867e4ca78763a6760206f74894 /sys/sys/cdefs.h | |
| parent | 6b0b09e72a82ff0e99c864ca023a9eb62f72d629 (diff) | |
| download | FreeBSD-src-81a3e2b46db5474df3633b850805e5e981a6cbb4.zip FreeBSD-src-81a3e2b46db5474df3633b850805e5e981a6cbb4.tar.gz | |
Add a convenience macro for the returns_twice attribute, and apply it to
the prototypes of the appropriate functions (getcontext, savectx,
setjmp, sigsetjmp and vfork).
MFC after: 2 weeks
Diffstat (limited to 'sys/sys/cdefs.h')
| -rw-r--r-- | sys/sys/cdefs.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sys/sys/cdefs.h b/sys/sys/cdefs.h index 076842d..80f7b8e 100644 --- a/sys/sys/cdefs.h +++ b/sys/sys/cdefs.h @@ -293,6 +293,12 @@ #define __nonnull(x) #endif +#if __GNUC_PREREQ__(4, 1) +#define __returns_twice __attribute__((__returns_twice__)) +#else +#define __returns_twice +#endif + /* XXX: should use `#if __STDC_VERSION__ < 199901'. */ #if !__GNUC_PREREQ__(2, 7) && !defined(__INTEL_COMPILER) #define __func__ NULL |
