libguile/null-threads.c

   1 /* Copyright (C) 2002, 2006, 2008 Free Software Foundation, Inc.
   2  *
   3  * This library is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU Lesser General Public
   5  * License as published by the Free Software Foundation; either
   6  * version 2.1 of the License, or (at your option) any later version.
   7  *
   8  * This library is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * Lesser General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public
  14  * License along with this library; if not, write to the Free Software
  15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  16  */
  17
  18 #ifdef HAVE_CONFIG_H
  19 # include <config.h>
  20 #endif
  21
  22 #include <stdlib.h>
  23 #include "libguile/_scm.h"
  24
  25 #if SCM_USE_NULL_THREADS
  26
  27 #include "libguile/null-threads.h"
  28
  29 static scm_i_pthread_key_t *all_keys = NULL;
  30
  31 static void
  32 destroy_keys (void)
  33 {
  34   scm_i_pthread_key_t *key;
  35   int again;
  36
  37   do {
  38     again = 0;
  39     for (key = all_keys; key; key = key->next)
  40       if (key->value && key->destr_func)
  41         {
  42           void *v = key->value;
  43           key->value = NULL;
  44           key->destr_func (v);
  45           again = 1;
  46         }
  47   } while (again);
  48 }
  49
  50 int
  51 scm_i_pthread_key_create (scm_i_pthread_key_t *key,
  52                           void (*destr_func) (void *))
  53 {
  54   if (all_keys == NULL)
  55     atexit (destroy_keys);
  56
  57   key->next = all_keys;
  58   all_keys = key;
  59   key->value = NULL;
  60   key->destr_func = destr_func;
  61
  62   return 0;
  63 }
  64
  65 #endif /* SCM_USE_NULL_THREADS */
  66
  67
  68 /*
  69   Local Variables:
  70   c-file-style: "gnu"
  71   End:
  72 */