1 /* unwind_prot.h - Macros and functions for hacking unwind protection. */
3 /* Copyright (C) 1993 Free Software Foundation, Inc.
5 This file is part of GNU Bash, the Bourne Again SHell.
7 Bash is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 Bash is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License along
18 with Bash; see the file COPYING. If not, write to the Free Software
19 Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
21 #if !defined (_UNWIND_PROT_H)
22 #define _UNWIND_PROT_H
24 /* Run a function without interrupts. */
25 extern void begin_unwind_frame ();
26 extern void discard_unwind_frame ();
27 extern void run_unwind_frame ();
28 extern void add_unwind_protect ();
29 extern void remove_unwind_protect ();
30 extern void run_unwind_protects ();
31 extern void unwind_protect_var ();
32 extern void clear_unwind_protect_list ();
34 /* Try to force correct alignment on machines where pointers and ints
41 /* Define for people who like their code to look a certain way. */
42 #define end_unwind_frame()
44 /* How to protect an integer. */
45 #define unwind_protect_int(X) \
50 unwind_protect_var (&(X), u.s, sizeof (int)); \
54 #define unwind_protect_short(X) \
55 unwind_protect_var ((int *)&(X), (char *)&(X), sizeof (short))
57 /* How to protect a pointer to a string. */
58 #define unwind_protect_string(X) \
59 unwind_protect_var ((int *)&(X), \
60 ((sizeof (char *) == sizeof (int)) ? (char *) (X) : (char *) &(X)), \
63 /* How to protect any old pointer. */
64 #define unwind_protect_pointer(X) unwind_protect_string (X)
66 /* How to protect the contents of a jmp_buf. */
67 #define unwind_protect_jmp_buf(X) \
68 unwind_protect_var ((int *)(X), (char *)(X), sizeof (procenv_t))
70 #endif /* _UNWIND_PROT_H */