.
[glibc/history.git] / stdlib / ucontext.h
blobee6f594f070f15ab0ec27d524481846f5b8ce213
1 /* Copyright (C) 1997, 1998, 1999, 2000 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 Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the 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 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 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 (ucontext_t *__ucp) __THROW;
34 /* Set user context from information of variable pointed to by UCP. */
35 extern int setcontext (__const ucontext_t *__ucp) __THROW;
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 (ucontext_t *__restrict __oucp,
40 __const ucontext_t *__restrict __ucp) __THROW;
42 /* Manipulate user context UCP to continue with calling functions FUNC
43 and the ARGC-1 parameters following ARGC when the context is used
44 the next time in `setcontext' or `swapcontext'.
46 We cannot say anything about the parameters FUNC takes; `void'
47 is as good as any other choice. */
48 extern void makecontext (ucontext_t *__ucp, void (*__func) (void),
49 int __argc, ...) __THROW;
51 __END_DECLS
53 #endif /* ucontext.h */