diff options
Diffstat (limited to 'gs/base/setjmp_.h')
| -rw-r--r-- | gs/base/setjmp_.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/gs/base/setjmp_.h b/gs/base/setjmp_.h new file mode 100644 index 000000000..563fb95b0 --- /dev/null +++ b/gs/base/setjmp_.h @@ -0,0 +1,42 @@ +/* Copyright (C) 2006 Artifex Software, Inc. + All Rights Reserved. + + This software is provided AS-IS with no warranty, either express or + implied. + + This software is distributed under license and may not be copied, modified + or distributed except as expressly authorized under the terms of that + license. Refer to licensing information at http://www.artifex.com/ + or contact Artifex Software, Inc., 7 Mt. Lassen Drive - Suite A-134, + San Rafael, CA 94903, U.S.A., +1(415)492-9861, for further information. +*/ + +/* $Id: setjmp_.h 6651 2006-03-13 16:18:19Z raph $ */ +/* Macros for making sure setjmp buffers are correctly aligned. */ + +#ifndef setjmp_INCLUDED +# define setjmp_INCLUDED + +#include <setjmp.h> + +typedef struct { + char c; + jmp_buf j; +} gsfix_jmp_buf_test; + +#define gsfix_jmp_buf_align ((size_t)&((gsfix_jmp_buf_test*)0)->j) + +typedef struct { + unsigned char stuff[sizeof(jmp_buf) + gsfix_jmp_buf_align]; +} gsfix_jmp_buf; + + +/* This could be moved into a function, but it's fairly harmless as a macro. */ +#define find_jmp_buf(gsfjb) \ + (*(jmp_buf *)( \ + ((size_t)(gsfjb).stuff + gsfix_jmp_buf_align) \ + & ~(size_t)(gsfix_jmp_buf_align-1) \ + )) + +#endif /* setjmp_INCLUDED */ + |