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1/* Declarations for handling faults in the signal thread.
2 Copyright (C) 1994-2019 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#ifndef _HURD_FAULT_H
20#define _HURD_FAULT_H
21
22#include <hurd/sigpreempt.h>
23#include <setjmp.h>
24
25/* Call this before code that might fault in the signal thread; SIGNO is
26 the signal expected to possibly arrive. This behaves like setjmp: it
27 returns zero the first time, and returns again nonzero if the signal
28 does arrive. */
29
30#define _hurdsig_catch_fault(sigset, firstcode, lastcode) \
31 (_hurdsig_fault_preemptor.signals = (sigset), \
32 _hurdsig_fault_preemptor.first = (long int) (firstcode), \
33 _hurdsig_fault_preemptor.last = (long int) (lastcode), \
34 setjmp (_hurdsig_fault_env))
35
36/* Call this at the end of a section protected by _hurdsig_catch_fault. */
37
38#define _hurdsig_end_catch_fault() \
39 (_hurdsig_fault_preemptor.signals = 0)
40
41extern jmp_buf _hurdsig_fault_env;
42extern struct hurd_signal_preemptor _hurdsig_fault_preemptor;
43
44
45#define _hurdsig_catch_memory_fault(object) \
46 _hurdsig_catch_fault (sigmask (SIGSEGV) | sigmask (SIGBUS), \
47 (object), (object) + 1)
48
49
50#endif /* hurdfault.h */
51

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