From 6811c064139574e2e2e07fdeb10218428cd68b36 Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Thu, 6 Jul 2000 06:37:55 +0000
Subject: Hacked things so longjmp now works.  -Erik

---
 include/setjmp.h | 107 +++++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 92 insertions(+), 15 deletions(-)

(limited to 'include/setjmp.h')

diff --git a/include/setjmp.h b/include/setjmp.h
index 53d0223fd..821e20bb7 100644
--- a/include/setjmp.h
+++ b/include/setjmp.h
@@ -1,22 +1,99 @@
+/* Copyright (C) 1991,92,93,94,95,96,97,98 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
 /*
-	setjmp.h
-	stubs for future use.
-*/
+ *	ISO C Standard: 4.6 NON-LOCAL JUMPS	<setjmp.h>
+ */
 
-#ifndef _SETJMP_H_
-#ifdef __cplusplus
-extern "C" {
-#endif
-#define _SETJMP_H_
+#ifndef	_SETJMP_H
+#define	_SETJMP_H	1
+
+#include <features.h>
+
+__BEGIN_DECLS
+
+#include <machine/setjmp.h>		/* Get `__jmp_buf'.  */
+#include <machine/sigset.h>		/* Get `__sigset_t'.  */
+
+/* Calling environment, plus possibly a saved signal mask.  */
+typedef struct __jmp_buf_tag	/* C++ doesn't like tagless structs.  */
+  {
+    /* NOTE: The machine-dependent definitions of `__sigsetjmp'
+       assume that a `jmp_buf' begins with a `__jmp_buf'.
+       Do not move this member or add others before it.  */
+    __jmp_buf __jmpbuf;		/* Calling environment.  */
+    int __mask_was_saved;	/* Saved the signal mask?  */
+    __sigset_t __saved_mask;	/* Saved signal mask.  */
+  } jmp_buf[1];
 
-#include "_ansi.h"
-#include <machine/setjmp.h>
 
-void	_EXFUN(longjmp,(jmp_buf __jmpb, int __retval));
-int	_EXFUN(setjmp,(jmp_buf __jmpb));
+/* Store the calling environment in ENV, also saving the
+   signal mask if SAVEMASK is nonzero.  Return 0.
+   This is the internal name for `sigsetjmp'.  */
+extern int __sigsetjmp __P ((jmp_buf __env, int __savemask));
 
-#ifdef __cplusplus
-}
+#ifndef	__FAVOR_BSD
+/* Set ENV to the current position and return 0, not saving the signal mask.
+   This is just like `sigsetjmp (ENV, 0)'.
+   The ISO C standard says `setjmp' is a macro.  */
+# define setjmp(env)	__sigsetjmp ((env), 0)
+#else
+/* We are in 4.3 BSD-compatibility mode in which `setjmp'
+   saves the signal mask like `sigsetjmp (ENV, 1)'.  */
+# define setjmp(env)	__sigsetjmp ((env), 1)
+#endif /* Favor BSD.  */
+
+#if defined __USE_BSD || defined __USE_XOPEN
+/* Set ENV to the current position and return 0, not saving the signal mask.
+   This is the 4.3 BSD name for ISO `setjmp'.  */
+# define _setjmp(env)	__sigsetjmp ((env), 0)
 #endif
-#endif /* _SETJMP_H_ */
 
+
+/* Jump to the environment saved in ENV, making the
+   `setjmp' call there return VAL, or 1 if VAL is 0.  */
+extern void longjmp __P ((jmp_buf __env, int __val))
+     __attribute__ ((__noreturn__));
+#if defined __USE_BSD || defined __USE_XOPEN
+/* Same.  Usually `_longjmp' is used with `_setjmp', which does not save
+   the signal mask.  But it is how ENV was saved that determines whether
+   `longjmp' restores the mask; `_longjmp' is just an alias.  */
+extern void _longjmp __P ((jmp_buf __env, int __val))
+     __attribute__ ((__noreturn__));
+#endif
+
+
+/* Use the same type for `jmp_buf' and `sigjmp_buf'.
+   The `__mask_was_saved' flag determines whether
+   or not `longjmp' will restore the signal mask.  */
+typedef jmp_buf sigjmp_buf;
+
+/* Store the calling environment in ENV, also saving the
+   signal mask if SAVEMASK is nonzero.  Return 0.  */
+# define sigsetjmp(env, savemask)	__sigsetjmp ((env), (savemask))
+
+/* Jump to the environment saved in ENV, making the
+   sigsetjmp call there return VAL, or 1 if VAL is 0.
+   Restore the signal mask if that sigsetjmp call saved it.
+   This is just an alias `longjmp'.  */
+extern void siglongjmp __P ((sigjmp_buf __env, int __val))
+     __attribute__ ((__noreturn__));
+
+__END_DECLS
+
+#endif /* setjmp.h  */
-- 
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