Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 1 | /* quit.h -- How to handle SIGINT gracefully. */ |
| 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 |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 19 | Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 20 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 21 | #if !defined (_QUIT_H_) |
| 22 | #define _QUIT_H_ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 23 | |
| 24 | /* Non-zero means SIGINT has already ocurred. */ |
| 25 | extern int interrupt_state; |
| 26 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 27 | /* Macro to call a great deal. SIGINT just sets above variable. When |
| 28 | it is safe, put QUIT in the code, and the "interrupt" will take place. */ |
| 29 | #define QUIT if (interrupt_state) throw_to_top_level () |
| 30 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 31 | #define SETINTERRUPT interrupt_state = 1 |
| 32 | #define CLRINTERRUPT interrupt_state = 0 |
| 33 | |
| 34 | #define ADDINTERRUPT interrupt_state++ |
| 35 | #define DELINTERRUPT interrupt_state-- |
| 36 | |
| 37 | #endif /* _QUIT_H_ */ |