quit.h

   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
  19    Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
  20
  21 #if !defined (_QUIT_H_)
  22 #define _QUIT_H_
  23
  24 /* Non-zero means SIGINT has already ocurred. */
  25 extern int interrupt_state;
  26
  27 extern void throw_to_top_level ();
  28
  29 /* Macro to call a great deal.  SIGINT just sets above variable.  When
  30    it is safe, put QUIT in the code, and the "interrupt" will take place. */
  31 #define QUIT if (interrupt_state) throw_to_top_level ()
  32
  33 #define SETINTERRUPT interrupt_state = 1
  34 #define CLRINTERRUPT interrupt_state = 0
  35
  36 #define ADDINTERRUPT interrupt_state++
  37 #define DELINTERRUPT interrupt_state--
  38
  39 #endif /* _QUIT_H_ */