Update.
[glibc.git] / stdlib / ucontext.h
blobd99e95e6527b6dae0a694abe3af7a5e4b6dec253
1 /* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
19 /* System V ABI compliant user-level context switching support. */
21 #ifndef _UCONTEXT_H
22 #define _UCONTEXT_H 1
24 #include <features.h>
26 /* Get machine dependent definition of data structures. */
27 #include <sys/ucontext.h>
29 __BEGIN_DECLS
31 /* Get user context and store it in variable pointed to by UCP. */
32 extern int getcontext __P ((ucontext_t *__ucp));
34 /* Set user context from information of variable pointed to by UCP. */
35 extern int setcontext __P ((__const ucontext_t *__ucp));
37 /* Save current context in context variable pointed to by OUCP and set
38 context from variable pointed to by UCP. */
39 extern int swapcontext __P ((ucontext_t *__oucp, __const ucontext_t *__ucp));
41 /* Manipulate user context UCP to continue with calling functions FUNC
42 and the ARGC-1 parameters following ARGC when the context is used
43 the next time in `setcontext' or `swapcontext'.
45 We cannot say anything about the parameters FUNC takes; `void'
46 is as good as any other choice. */
47 extern void makecontext __P ((ucontext_t *__ucp, void (*__func) (void),
48 int __argc, ...));
50 __END_DECLS
52 #endif /* ucontext.h */