[patch/rfa]: Add _setjmp/_longjmp macros

[Joel Sherrill]

Corinna Vinschen wrote:
> On Jan 13 17:32, Corinna Vinschen wrote:
>   
>> Hi,
>>
>> SUSv3 defines a _setjmp/_longjmp pair of functions, which are equivalent
>> to setjmp/longjmp, except that they shall never manipulate the signal
>> mask:
>>
>> http://www.opengroup.org/onlinepubs/009695399/functions/_setjmp.html
>>
>> The below patch adds _setjmp and _longjmp as macros calling
>> sigsetjmp/siglongjmp.
>>     
>
> I applied the below additional patch as obvious.  It defines both
> interfaces as functions when building for Cygwin.
>
>   
Would you mind making them available for RTEMS also?
We try to follow SYSv3 as much as is possible in a single process,
multithreaded environment (PSE52).

It should just require doing an "|| defined(__rtems__)"

Thanks.

--joel
> Corinna
>
>
>         * libc/include/machine/setjmp.h (_longjmp): Define as function on
>         Cygwin.
>         (_setjmp): Ditto.
>
>
> Index: libc/include/machine/setjmp.h
> ===================================================================
> RCS file: /cvs/src/src/newlib/libc/include/machine/setjmp.h,v
> retrieving revision 1.35
> diff -u -p -r1.35 setjmp.h
> --- libc/include/machine/setjmp.h       15 Jan 2008 09:41:06 -0000      1.35
> +++ libc/include/machine/setjmp.h       21 Jun 2008 18:45:53 -0000
> @@ -307,11 +307,16 @@ typedef int sigjmp_buf[_JBLEN+2];
>
>  #endif
>
> -/* POSIX _setjmp/_longjmp macros, maintained for XSI compatibility.  These
> +/* POSIX _setjmp/_longjmp, maintained for XSI compatibility.  These
>     are equivalent to sigsetjmp/siglongjmp when not saving the signal mask.
>     New applications should use sigsetjmp/siglongjmp instead. */
> +#ifdef __CYGWIN__
> +extern void _longjmp(jmp_buf, int);
> +extern int _setjmp(jmp_buf);
> +#else
>  #define _setjmp(env)           sigsetjmp ((env), 0)
>  #define _longjmp(env, val)     siglongjmp ((env), (val))
> +#endif
>
>  #ifdef __cplusplus
>  }
>
> --
> Corinna Vinschen
> Cygwin Project Co-Leader
> Red Hat
>   


-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel.sherrill@OARcorp.com        On-Line Applications Research
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