1: /* Copyright (C) 1997,1999,2000,2001,2002,2003 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 <atomic.h>
   20: #include <stdlib.h>
   21: #include <set-hooks.h>
   22: #include <libc-internal.h>
   23: 
   24: #ifdef USE_IN_LIBIO
   25: # include "../libio/libioP.h"
   26: #endif
   27: 
   28: DEFINE_HOOK (__libc_subfreeres, (void));
   29: 
   30: symbol_set_define (__libc_freeres_ptrs);
   31: 
   32: void __libc_freeres_fn_section
   33: __libc_freeres (void)
   34: {
   35:   /* This function might be called from different places.  So better
   36:      protect for multiple executions since these are fatal.  */
   37:   static long int already_called;
   38: 
   39:   if (! atomic_compare_and_exchange_bool_acq (&already_called, 1, 0))
   40:     {
   41:       void * const *p;
   42: 
   43: #ifdef USE_IN_LIBIO
   44:       _IO_cleanup ();
   45: #endif
   46: 
   47:       RUN_HOOK (__libc_subfreeres, ());
   48: 
   49:       for (p = symbol_set_first_element (__libc_freeres_ptrs);
   50:            ! symbol_set_end_p (__libc_freeres_ptrs, p); ++p)
   51:         free (*p);
   52:     }
   53: }
   54: libc_hidden_def (__libc_freeres)