projects / thirdparty / bash.git / blame
| Commit | Line | Data |
|---|---|---|
| 726f6388 JA |
1 | /* unwind_prot.h - Macros and functions for hacking unwind protection. */ |
| 2 | ||
| 3 | /* Copyright (C) 1993 Free Software Foundation, Inc. | |
| 4 | ||
| 5 | This file is part of GNU Bash, the Bourne Again SHell. | |
| 6 | ||
| 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 | |
| 10 | version. | |
| 11 | ||
| 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 | |
| 15 | for more details. | |
| 16 | ||
| 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 | |
| bb70624e | 19 | Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
| 726f6388 JA |
20 | |
| 21 | #if !defined (_UNWIND_PROT_H) | |
| 22 | #define _UNWIND_PROT_H | |
| 23 | ||
| 24 | /* Run a function without interrupts. */ | |
| ccc6cda3 JA |
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 (); | |
| 28ef6c31 | 32 | extern void clear_unwind_protect_list (); |
| ccc6cda3 JA |
33 | |
| 34 | /* Try to force correct alignment on machines where pointers and ints | |
| 35 | differ in size. */ | |
| 36 | typedef union { | |
| 37 | char *s; | |
| 38 | int i; | |
| 39 | } UWP; | |
| 726f6388 JA |
40 | |
| 41 | /* Define for people who like their code to look a certain way. */ | |
| 42 | #define end_unwind_frame() | |
| 43 | ||
| 44 | /* How to protect an integer. */ | |
| ccc6cda3 JA |
45 | #define unwind_protect_int(X) \ |
| 46 | do \ | |
| 47 | { \ | |
| 48 | UWP u; \ | |
| 49 | u.i = (X); \ | |
| 50 | unwind_protect_var (&(X), u.s, sizeof (int)); \ | |
| 51 | } \ | |
| 52 | while (0) | |
| 53 | ||
| 54 | #define unwind_protect_short(X) \ | |
| 55 | unwind_protect_var ((int *)&(X), (char *)&(X), sizeof (short)) | |
| 726f6388 JA |
56 | |
| 57 | /* How to protect a pointer to a string. */ | |
| 58 | #define unwind_protect_string(X) \ | |
| 28ef6c31 JA |
59 | unwind_protect_var ((int *)&(X), \ |
| 60 | ((sizeof (char *) == sizeof (int)) ? (char *) (X) : (char *) &(X)), \ | |
| 61 | sizeof (char *)) | |
| 726f6388 JA |
62 | |
| 63 | /* How to protect any old pointer. */ | |
| 64 | #define unwind_protect_pointer(X) unwind_protect_string (X) | |
| 65 | ||
| 66 | /* How to protect the contents of a jmp_buf. */ | |
| 67 | #define unwind_protect_jmp_buf(X) \ | |
| ccc6cda3 | 68 | unwind_protect_var ((int *)(X), (char *)(X), sizeof (procenv_t)) |
| 726f6388 JA |
69 | |
| 70 | #endif /* _UNWIND_PROT_H */ |