sys/sys/ucontext.h

   1 /*-
   2  * Copyright (c) 1999 Marcel Moolenaar
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer
  10  *    in this position and unchanged.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/sys/sys/ucontext.h,v 1.4 1999/10/11 20:33:17 luoqi Exp $
  29  * $DragonFly: src/sys/sys/ucontext.h,v 1.5 2007/01/16 09:58:02 swildner Exp $
  30  */
  31
  32 #ifndef _SYS_UCONTEXT_H_
  33 #define _SYS_UCONTEXT_H_
  34
  35 #ifndef _SYS_SIGNAL_H_
  36 #include <sys/signal.h>
  37 #endif
  38 #ifndef _MACHINE_UCONTEXT_H_
  39 #include <machine/ucontext.h>
  40 #endif
  41
  42 typedef struct __ucontext {
  43         /*
  44          * Keep the order of the first two fields. Also,
  45          * keep them the first two fields in the structure.
  46          * This way we can have a union with struct
  47          * sigcontext and ucontext_t. This allows us to
  48          * support them both at the same time.
  49          * note: the union is not defined, though.
  50          */
  51         sigset_t        uc_sigmask;
  52         mcontext_t      uc_mcontext;
  53
  54         struct __ucontext *uc_link;
  55         stack_t         uc_stack;
  56         int             __spare__[8];
  57 } ucontext_t;
  58
  59 #ifndef _KERNEL
  60
  61 __BEGIN_DECLS
  62
  63 int     getcontext(ucontext_t *);
  64 int     setcontext(const ucontext_t *);
  65 void    makecontext(ucontext_t *, void (*)(void), int, ...);
  66 int     swapcontext(ucontext_t *, const ucontext_t *);
  67
  68 __END_DECLS
  69
  70 #endif /* !_KERNEL */
  71
  72 #endif /* !_SYS_UCONTEXT_H_ */