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/* Declarations for handling faults in the signal thread.
Copyright (C) 1994-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _HURD_FAULT_H
#define _HURD_FAULT_H
#include <hurd/sigpreempt.h>
#include <setjmp.h>
/* Call this before code that might fault in the signal thread; SIGNO is
the signal expected to possibly arrive. This behaves like setjmp: it
returns zero the first time, and returns again nonzero if the signal
does arrive. */
#define _hurdsig_catch_fault(sigset, firstcode, lastcode) \
(_hurdsig_fault_preemptor.signals = (sigset), \
_hurdsig_fault_preemptor.first = (long int) (firstcode), \
_hurdsig_fault_preemptor.last = (long int) (lastcode), \
setjmp (_hurdsig_fault_env))
/* Call this at the end of a section protected by _hurdsig_catch_fault. */
#define _hurdsig_end_catch_fault() \
(_hurdsig_fault_preemptor.signals = 0)
extern jmp_buf _hurdsig_fault_env;
extern struct hurd_signal_preemptor _hurdsig_fault_preemptor;
#define _hurdsig_catch_memory_fault(object) \
_hurdsig_catch_fault (__sigmask (SIGSEGV) | __sigmask (SIGBUS), \
(object), (object) + 1)
#endif /* hurdfault.h */
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