1 /* sigstack, sigaltstack definitions.
2 Copyright (C) 1998-2015 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 _SIGNAL_H
20 # error "Never include this file directly. Use <signal.h> instead"
21 #endif
22
23
24 /* Structure describing a signal stack (obsolete). */
25 struct sigstack
26 {
27 void *ss_sp; /* Signal stack pointer. */
28 int ss_onstack; /* Nonzero if executing on this stack. */
29 };
30
31
32 /* Possible values for `ss_flags.'. */
33 enum
34 {
35 SS_ONSTACK = 1,
36 #define SS_ONSTACK SS_ONSTACK
37 SS_DISABLE
38 #define SS_DISABLE SS_DISABLE
39 };
40
41 /* Minimum stack size for a signal handler. */
42 #define MINSIGSTKSZ 2048
43
44 /* System default stack size. */
45 #define SIGSTKSZ 8192
46
47
48 /* Alternate, preferred interface. */
49 typedef struct sigaltstack
50 {
51 void *ss_sp;
52 int ss_flags;
53 size_t ss_size;
54 } stack_t;
55