/* Data structures for user-level context switching.  Generic version.   Copyright (C) 1997,98,99,2001 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 Lesser General Public   License as published by the Free Software Foundation; either   version 2.1 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   Lesser General Public License for more details.   You should have received a copy of the GNU Lesser General Public   License along with the GNU C Library; if not, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  *//* This file's definitions suffice for any platform where all   the machine-specific state is described in `struct sigcontext'.  */#ifndef _SYS_UCONTEXT_H#define _SYS_UCONTEXT_H	1#include <features.h>#include <signal.h>/* We need the signal context definitions even if they are not used   included in <signal.h>.  */#include <bits/sigcontext.h>typedef struct sigcontext mcontext_t;/* Userlevel context.  */typedef struct ucontext  {    unsigned long int uc_flags;    struct ucontext *uc_link;    stack_t uc_stack;    mcontext_t uc_mcontext;    __sigset_t uc_sigmask;  } ucontext_t;#endif /* sys/ucontext.h */