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https://git.musl-libc.org/git/musl
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0c05bd3a9c
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.
49 lines
866 B
C
49 lines
866 B
C
#ifndef _SETJMP_H
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#define _SETJMP_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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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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#include <bits/setjmp.h>
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#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
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|| defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
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|| defined(_BSD_SOURCE)
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typedef struct {
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jmp_buf __jb;
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unsigned long __fl;
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unsigned long __ss[128/sizeof(long)];
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} sigjmp_buf[1];
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int sigsetjmp (sigjmp_buf, int);
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_Noreturn void siglongjmp (sigjmp_buf, int);
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#endif
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#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
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|| defined(_BSD_SOURCE)
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int _setjmp (jmp_buf);
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_Noreturn void _longjmp (jmp_buf, int);
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#endif
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int setjmp (jmp_buf);
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_Noreturn void longjmp (jmp_buf, int);
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#define setjmp setjmp
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#define longjmp longjmp
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#ifdef __cplusplus
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}
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#endif
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#endif
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