libc: add getcontext, setcontext, makecontext and swapcontext on x86_64
[dragonfly.git] / sys / sys / ucontext.h
CommitLineData
984263bc
MD
1/*-
2 * Copyright (c) 1999 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $FreeBSD: src/sys/sys/ucontext.h,v 1.4 1999/10/11 20:33:17 luoqi Exp $
29 */
30
31#ifndef _SYS_UCONTEXT_H_
32#define _SYS_UCONTEXT_H_
33
1bd40720
MD
34#ifndef _SYS_SIGNAL_H_
35#include <sys/signal.h>
36#endif
984263bc
MD
37#include <machine/ucontext.h>
38
39typedef struct __ucontext {
40 /*
41 * Keep the order of the first two fields. Also,
42 * keep them the first two fields in the structure.
43 * This way we can have a union with struct
44 * sigcontext and ucontext_t. This allows us to
45 * support them both at the same time.
46 * note: the union is not defined, though.
47 */
48 sigset_t uc_sigmask;
49 mcontext_t uc_mcontext;
50
51 struct __ucontext *uc_link;
52 stack_t uc_stack;
53 int __spare__[8];
54} ucontext_t;
55
e2742650
MD
56#ifndef _KERNEL
57
58__BEGIN_DECLS
59
fd4e5f06 60#if __BSD_VISIBLE || __POSIX_VISIBLE < 200809
e2742650
MD
61int getcontext(ucontext_t *);
62int setcontext(const ucontext_t *);
63void makecontext(ucontext_t *, void (*)(void), int, ...);
64int swapcontext(ucontext_t *, const ucontext_t *);
fd4e5f06 65#endif
e2742650
MD
66
67__END_DECLS
68
e787ed43
SW
69#endif /* !_KERNEL */
70
984263bc 71#endif /* !_SYS_UCONTEXT_H_ */