hurd/hurdfault.h

   1 /* Declarations for handling faults in the signal thread.
   2 Copyright (C) 1994 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 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.
   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 Library General Public License for more details.
  14
  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
  17 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  18 Cambridge, MA 02139, USA.  */
  19
  20 #ifndef _HURD_FAULT_H
  21 #define _HURD_FAULT_H
  22
  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(signo) \
  31   (_hurdsig_fault_expect_signo = (signo), setjmp (_hurdsig_fault_env))
  32
  33 /* Call this at the end of a section protected by _hurdsig_catch_fault.  */
  34
  35 #define _hurdsig_end_catch_fault() \
  36   (_hurdsig_fault_expect_signo = 0)
  37
  38 extern jmp_buf _hurdsig_fault_env;
  39 extern int _hurdsig_fault_expect_signo;
  40
  41 /* If _hurdsig_catch_fault returns nonzero, these variables
  42    contain information about the signal that arrived.  */
  43
  44
  45
  46 extern long int _hurdsig_fault_sigcode;
  47 extern int _hurdsig_fault_sigerror;
  48
  49 #endif  /* hurd/fault.h */