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[glibc.git] / bits / sigstack.h
blobb1c8d61ed0adcc973459ea0e1da7def644bc5b60
1 /* sigstack, sigaltstack definitions.
2 Copyright (C) 1998, 1999 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 _SIGNAL_H
21 # error "Never include this file directly. Use <signal.h> instead"
22 #endif
25 /* Structure describing a signal stack (obsolete). */
26 struct sigstack
28 __ptr_t ss_sp; /* Signal stack pointer. */
29 int ss_onstack; /* Nonzero if executing on this stack. */
33 /* Alternate, preferred interface. */
34 typedef struct sigaltstack
36 __ptr_t ss_sp;
37 size_t ss_size;
38 int ss_flags;
39 } stack_t;
42 /* Possible values for `ss_flags.'. */
43 enum
45 SS_ONSTACK = 0x0001,
46 #define SS_ONSTACK SS_ONSTACK
47 SS_DISABLE = 0x0004
48 #define SS_DISABLE SS_DISABLE
51 /* Minumum stack size for a signal handler. */
52 #define MINSIGSTKSZ 8192
54 /* System default stack size. */
55 #define SIGSTKSZ (MINSIGSTKSZ + 32768)