Fwd: [patch/rfa]: Add _setjmp/_longjmp macros

[Reini Urban]

This recent cygwin change will clarify recent discussion.

---------- Forwarded message ----------
From: Corinna Vinschen <vinschen@...>
Date: 2008/6/21
Subject: Re: [patch/rfa]: Add _setjmp/_longjmp macros
To: newlib@...


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.


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



--
Reini Urban
http://phpwiki.org/              http://murbreak.at/


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