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[glibc.git] / hurd / hurdfault.h
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1 /* Declarations for handling faults in the signal thread.
2 Copyright (C) 1994, 1996 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
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 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
20 #ifndef _HURD_FAULT_H
21 #define _HURD_FAULT_H
23 #include <hurd/sigpreempt.h>
24 #include <setjmp.h>
26 /* Call this before code that might fault in the signal thread; SIGNO is
27 the signal expected to possibly arrive. This behaves like setjmp: it
28 returns zero the first time, and returns again nonzero if the signal
29 does arrive. */
31 #define _hurdsig_catch_fault(sigset, firstcode, lastcode) \
32 (_hurdsig_fault_preemptor.signals = (sigset), \
33 _hurdsig_fault_preemptor.first = (long int) (firstcode), \
34 _hurdsig_fault_preemptor.last = (long int) (lastcode), \
35 setjmp (_hurdsig_fault_env))
37 /* Call this at the end of a section protected by _hurdsig_catch_fault. */
39 #define _hurdsig_end_catch_fault() \
40 (_hurdsig_fault_preemptor.signals = 0)
42 extern jmp_buf _hurdsig_fault_env;
43 extern struct hurd_signal_preemptor _hurdsig_fault_preemptor;
46 #define _hurdsig_catch_memory_fault(object) \
47 _hurdsig_catch_fault (sigmask (SIGSEGV) | sigmask (SIGBUS), \
48 (object), (object) + 1)
51 #endif /* hurdfault.h */