stdlib/exit.h

   1 /* Copyright (C) 1991, 1996, 1997, 1999, 2001 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #ifndef _EXIT_H
  20 #define _EXIT_H 1
  21
  22
  23 enum
  24 {
  25   ef_free,      /* `ef_free' MUST be zero!  */
  26   ef_us,
  27   ef_on,
  28   ef_at,
  29   ef_cxa
  30 };
  31
  32 struct exit_function
  33   {
  34     /* `flavour' should be of type of the `enum' above but since we need
  35        this element in an atomic operation we have to use `long int'.  */
  36     long int flavor;
  37     union
  38       {
  39         void (*at) (void);
  40         struct
  41           {
  42             void (*fn) (int status, void *arg);
  43             void *arg;
  44           } on;
  45         struct
  46           {
  47             void (*fn) (void *arg, int status);
  48             void *arg;
  49             void *dso_handle;
  50           } cxa;
  51       } func;
  52   };
  53 struct exit_function_list
  54   {
  55     struct exit_function_list *next;
  56     size_t idx;
  57     struct exit_function fns[32];
  58   };
  59 extern struct exit_function_list *__exit_funcs;
  60
  61 extern struct exit_function *__new_exitfn (void);
  62
  63 #endif  /* exit.h  */