/* Declarations for handling faults in the signal thread.

   Copyright (C) 1994-2018 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

   <http://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 */