2011-04-05 15:16:49 +00:00
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#ifndef _ERR_H
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#define _ERR_H
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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.
2012-09-07 03:34:10 +00:00
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#if __STDC_VERSION__ >= 201112L
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#elif defined(__GNUC__)
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#define _Noreturn __attribute__((__noreturn__))
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#else
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#define _Noreturn
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#endif
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2011-04-05 15:16:49 +00:00
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#include <stdarg.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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void warn(const char *, ...);
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void vwarn(const char *, va_list);
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void warnx(const char *, ...);
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void vwarnx(const char *, va_list);
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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.
2012-09-07 03:34:10 +00:00
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_Noreturn void err(int, const char *, ...);
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_Noreturn void verr(int, const char *, va_list);
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_Noreturn void errx(int, const char *, ...);
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_Noreturn void verrx(int, const char *, va_list);
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2011-04-05 15:16:49 +00:00
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#ifdef __cplusplus
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}
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#endif
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#endif
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