src/unwind_prot.h

   1 /* unwind_prot.h - Macros and functions for hacking unwind protection. */
   2
   3 /* Copyright (C) 1993-2020 Free Software Foundation, Inc.
   4
   5    This file is part of GNU Bush, the Bourne Again SHell.
   6
   7    Bush is free software: you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation, either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    Bush is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with Bush.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #if !defined (_UNWIND_PROT_H)
  22 #define _UNWIND_PROT_H
  23
  24 extern void uwp_init PARAMS((void));
  25
  26 /* Run a function without interrupts. */
  27 extern void begin_unwind_frame PARAMS((char *));
  28 extern void discard_unwind_frame PARAMS((char *));
  29 extern void run_unwind_frame PARAMS((char *));
  30 extern void add_unwind_protect (); /* Not portable to arbitrary C99 hosts.  */
  31 extern void remove_unwind_protect PARAMS((void));
  32 extern void run_unwind_protects PARAMS((void));
  33 extern void clear_unwind_protect_list PARAMS((int));
  34 extern int have_unwind_protects PARAMS((void));
  35 extern int unwind_protect_tag_on_stack PARAMS((const char *));
  36 extern void uwp_init PARAMS((void));
  37
  38 /* Define for people who like their code to look a certain way. */
  39 #define end_unwind_frame()
  40
  41 /* How to protect a variable.  */
  42 #define unwind_protect_var(X) unwind_protect_mem ((char *)&(X), sizeof (X))
  43 extern void unwind_protect_mem PARAMS((char *, int));
  44
  45 /* Backwards compatibility */
  46 #define unwind_protect_int      unwind_protect_var
  47 #define unwind_protect_short    unwind_protect_var
  48 #define unwind_protect_string   unwind_protect_var
  49 #define unwind_protect_pointer  unwind_protect_var
  50 #define unwind_protect_jmp_buf  unwind_protect_var
  51
  52 #endif /* _UNWIND_PROT_H */