39 lines
1.4 KiB
C
39 lines
1.4 KiB
C
/* quit.h -- How to handle SIGINT gracefully. */
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/* Copyright (C) 1993 Free Software Foundation, Inc.
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This file is part of GNU Bash, the Bourne Again SHell.
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Bash is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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Bash is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License along
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with Bash; see the file COPYING. If not, write to the Free Software
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Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#if !defined (_QUIT_H_)
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#define _QUIT_H_
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/* Non-zero means SIGINT has already ocurred. */
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extern int interrupt_state;
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extern void throw_to_top_level ();
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/* Macro to call a great deal. SIGINT just sets above variable. When
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it is safe, put QUIT in the code, and the "interrupt" will take place. */
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#define QUIT if (interrupt_state) throw_to_top_level ()
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#define SETINTERRUPT interrupt_state = 1
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#define CLRINTERRUPT interrupt_state = 0
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#define ADDINTERRUPT interrupt_state++
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#define DELINTERRUPT interrupt_state--
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#endif /* _QUIT_H_ */
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