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Diffstat (limited to 'quit.h')
| -rw-r--r-- | quit.h | 37 |
1 files changed, 37 insertions, 0 deletions
@@ -0,0 +1,37 @@ +/* quit.h -- How to handle SIGINT gracefully. */ + +/* Copyright (C) 1993 Free Software Foundation, Inc. + + This file is part of GNU Bash, the Bourne Again SHell. + + Bash is free software; you can redistribute it and/or modify it under + the terms of the GNU General Public License as published by the Free + Software Foundation; either version 2, or (at your option) any later + version. + + Bash is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or + FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + for more details. + + You should have received a copy of the GNU General Public License along + with Bash; see the file COPYING. If not, write to the Free Software + Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ + +#if !defined (_QUIT_H_) +#define _QUIT_H_ + +/* Non-zero means SIGINT has already ocurred. */ +extern int interrupt_state; + +/* Macro to call a great deal. SIGINT just sets above variable. When + it is safe, put QUIT in the code, and the "interrupt" will take place. */ +#define QUIT if (interrupt_state) throw_to_top_level () + +#define SETINTERRUPT interrupt_state = 1 +#define CLRINTERRUPT interrupt_state = 0 + +#define ADDINTERRUPT interrupt_state++ +#define DELINTERRUPT interrupt_state-- + +#endif /* _QUIT_H_ */ |