unwind_prot.h

   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
  19    Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
  20
  21 #if !defined (_UNWIND_PROT_H)
  22 #define _UNWIND_PROT_H
  23
  24 /* Run a function without interrupts. */
  25 void
  26   begin_unwind_frame (), discard_unwind_frame (),
  27   run_unwind_frame (), add_unwind_protect (), remove_unwind_protect (),
  28   run_unwind_protects ();
  29
  30 /* Define for people who like their code to look a certain way. */
  31 #define end_unwind_frame()
  32
  33 /* How to protect an integer. */
  34 #define unwind_protect_int(X) unwind_protect_var (&(X), (char *)(X), sizeof (int))
  35
  36 /* How to protect a pointer to a string. */
  37 #define unwind_protect_string(X) \
  38   unwind_protect_var ((int *)&(X), (X), sizeof (char *))
  39
  40 /* How to protect any old pointer. */
  41 #define unwind_protect_pointer(X) unwind_protect_string (X)
  42
  43 /* How to protect the contents of a jmp_buf. */
  44 #define unwind_protect_jmp_buf(X) \
  45   unwind_protect_var ((int *)(X), (char *)(X), sizeof (jmp_buf))
  46
  47 #endif /* _UNWIND_PROT_H */