dlfcn/modatexit.c

   1 /* Copyright (C) 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 #include <stdio.h>
  20 #include <stdlib.h>
  21
  22 int global;
  23 int *ip;
  24
  25 extern void dummy (void);
  26 extern void foo (void *p);
  27
  28 void
  29 dummy (void)
  30 {
  31   printf ("This is %s\n", __FUNCTION__);
  32   *ip = global = 1;
  33 }
  34
  35
  36 void
  37 foo (void *p)
  38 {
  39   extern void *__dso_handle __attribute__ ((__weak__));
  40   printf ("This is %s\n", __FUNCTION__);
  41   atexit (dummy);
  42   if (&__dso_handle) puts ("have dso handle"); else puts ("no dso handle");
  43   ip = p;
  44 }