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Chet Ramey
61 lines
2.3 KiB
C
61 lines
2.3 KiB
C
/* unwind_prot.h - Macros and functions for hacking unwind protection. */
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/* Copyright (C) 1993-2023 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
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Bash is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bash. If not, see <http://www.gnu.org/licenses/>.
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*/
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#if !defined (_UNWIND_PROT_H)
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#define _UNWIND_PROT_H
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/* Generic function type void (*) (void *) for all unwind cleanups. A
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cleanup function does not return a value and takes a single generic
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pointer argument. This type works fine for arbitrary pointers; if a
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cleanup function needs to take an int argument, it's passed through
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a cast to intptr_t, an integer type that's safe to convert to and
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from a pointer. */
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typedef void sh_uwfunc_t (void *);
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extern void uwp_init (void);
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/* Run a function without interrupts. */
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extern void begin_unwind_frame (char *);
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extern void discard_unwind_frame (char *);
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extern void run_unwind_frame (char *);
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extern void add_unwind_protect (sh_uwfunc_t *, void *);
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extern void remove_unwind_protect (void);
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extern void run_unwind_protects (void);
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extern void clear_unwind_protect_list (int);
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extern int have_unwind_protects (void);
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extern int unwind_protect_tag_on_stack (const char *);
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/* Define for people who like their code to look a certain way. */
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#define end_unwind_frame()
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/* How to protect a variable. */
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#define unwind_protect_var(X) unwind_protect_mem ((char *)&(X), sizeof (X))
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extern void unwind_protect_mem (char *, int);
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/* Backwards compatibility */
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#define unwind_protect_int unwind_protect_var
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#define unwind_protect_short unwind_protect_var
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#define unwind_protect_string unwind_protect_var
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#define unwind_protect_pointer unwind_protect_var
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#define unwind_protect_jmp_buf unwind_protect_var
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#endif /* _UNWIND_PROT_H */
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