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