1 files changed, 52 insertions, 0 deletions
diff --git a/stdlib/ucontext.h b/stdlib/ucontext.h
new file mode 100644
index 0000000000..2fd65767a6
--- /dev/null
+++ b/stdlib/ucontext.h
@@ -0,0 +1,52 @@
+/* Copyright (C) 1997 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 ((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, 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) __P ((void)),
+			      int __argc, ...));
+
+__END_DECLS
+
+#endif /* ucontext.h */