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| author | Rich Felker <dalias@aerifal.cx> | 2012-09-06 23:34:10 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2012-09-06 23:34:10 -0400 |
| commit | 0c05bd3a9c165cf2f0b9d6fa23a1f96532ddcdb3 (patch) | |
| tree | 124c1d65e338abece7cf55c95cbc8195be94fe2f /include/setjmp.h | |
| parent | 453059571c9dc84dd168631eced25ec2d7afd98e (diff) | |
| download | musl-0c05bd3a9c165cf2f0b9d6fa23a1f96532ddcdb3.tar.gz | |
further use of _Noreturn, for non-plain-C functions
note that POSIX does not specify these functions as _Noreturn, because
POSIX is aligned with C99, not the new C11 standard. when POSIX is
eventually updated to C11, it will almost surely give these functions
the _Noreturn attribute. for now, the actual _Noreturn keyword is not
used anyway when compiling with a c99 compiler, which is what POSIX
requires; the GCC __attribute__ is used instead if it's available,
however.
in a few places, I've added infinite for loops at the end of _Noreturn
functions to silence compiler warnings. presumably
__buildin_unreachable could achieve the same thing, but it would only
work on newer GCCs and would not be portable. the loops should have
near-zero code size cost anyway.
like the previous _Noreturn commit, this one is based on patches
contributed by philomath.
Diffstat (limited to 'include/setjmp.h')
| -rw-r--r-- | include/setjmp.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/setjmp.h b/include/setjmp.h index 8ec5c6f1..e5877b44 100644 --- a/include/setjmp.h +++ b/include/setjmp.h @@ -24,14 +24,14 @@ typedef struct { unsigned long __ss[128/sizeof(long)]; } sigjmp_buf[1]; int sigsetjmp (sigjmp_buf, int); -void siglongjmp (sigjmp_buf, int); +_Noreturn void siglongjmp (sigjmp_buf, int); #endif #if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \ || defined(_BSD_SOURCE) int _setjmp (jmp_buf); -void _longjmp (jmp_buf, int); +_Noreturn void _longjmp (jmp_buf, int); #endif |