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Improve error detection and handling:

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Reduce _JBLEN for the i386 to what is actually used.
	Encapsulate jmp_buf and sigjmp_buf in structs.
	Enlarge jmp_buf to the same size as sigjmp_buf.
	Declare *longjmp as non-returning.

Remove stale comments about sig*jmp not being implemented.
This commit is contained in:
Bruce Evans 1994-10-25 14:11:35 +00:00
parent 1a4206dd85
commit b5fd024b77
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=3852
1 changed files with 13 additions and 11 deletions
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24
include/setjmp.h
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@ -46,7 +46,7 @@
#endif
#if defined(i386) || defined(__i386__)
#define _JBLEN 10
#define _JBLEN 8
#endif
#if defined(mips) || defined(__mips__)
@ -65,32 +65,34 @@
#define _JBLEN 10
#endif
#ifndef _ANSI_SOURCE
/*
* WARNING: sigsetjmp() isn't supported yet, this is a placeholder.
* jmp_buf and sigjmp_buf are encapsulated in different structs to force
* compile-time diagnostics for mismatches. The structs are the same
* internally to avoid some run-time errors for mismatches.
*/
typedef int sigjmp_buf[_JBLEN + 1];
#ifndef _ANSI_SOURCE
typedef struct { int _sjb[_JBLEN + 1]; } sigjmp_buf[1];
#endif /* not ANSI */
typedef int jmp_buf[_JBLEN];
typedef struct { int _jb[_JBLEN + 1]; } jmp_buf[1];
#include <sys/cdefs.h>
__BEGIN_DECLS
int setjmp __P((jmp_buf));
void longjmp __P((jmp_buf, int));
__dead
void longjmp __P((jmp_buf, int)) __dead2;
#ifndef _ANSI_SOURCE
/*
* WARNING: sigsetjmp() isn't supported yet, this is a placeholder.
*/
int sigsetjmp __P((sigjmp_buf, int));
void siglongjmp __P((sigjmp_buf, int));
__dead
void siglongjmp __P((sigjmp_buf, int)) __dead2;
#endif /* not ANSI */
#if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
int _setjmp __P((jmp_buf));
void _longjmp __P((jmp_buf, int));
__dead
void _longjmp __P((jmp_buf, int)) __dead2;
void longjmperror __P((void));
#endif /* neither ANSI nor POSIX */
__END_DECLS