sysdeps/generic/sys/ucontext.h

   1 /* Data structures for user-level context switching.  Generic version.
   2    Copyright (C) 1997-2019 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 /* This file's definitions suffice for any platform where all
  20    the machine-specific state is described in `struct sigcontext', but
  21    use of struct sigcontext does not conform to POSIX namespace
  22    requirements.  */
  23
  24 #ifndef _SYS_UCONTEXT_H
  25 #define _SYS_UCONTEXT_H 1
  26
  27 #include <features.h>
  28
  29 #include <bits/types/sigset_t.h>
  30 #include <bits/sigcontext.h>
  31 #include <bits/types/stack_t.h>
  32
  33
  34 typedef struct sigcontext mcontext_t;
  35
  36 #ifdef __USE_MISC
  37 # define __ctx(fld) fld
  38 #else
  39 # define __ctx(fld) __ ## fld
  40 #endif
  41
  42 /* Userlevel context.  */
  43 typedef struct ucontext_t
  44   {
  45     unsigned long int __ctx(uc_flags);
  46     struct ucontext_t *uc_link;
  47     stack_t uc_stack;
  48     mcontext_t uc_mcontext;
  49     sigset_t uc_sigmask;
  50   } ucontext_t;
  51
  52 #undef __ctx
  53
  54 #endif /* sys/ucontext.h */