libguile/null-threads.c

   1 /* Copyright (C) 2002 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  16  */
  17
  18 #include <stdlib.h>
  19 #include "libguile/_scm.h"
  20
  21 #if SCM_USE_NULL_THREADS
  22
  23 #include "libguile/null-threads.h"
  24
  25 static scm_i_pthread_key_t *all_keys = NULL;
  26
  27 static void
  28 destroy_keys (void)
  29 {
  30   scm_i_pthread_key_t *key;
  31   int again;
  32
  33   do {
  34     again = 0;
  35     for (key = all_keys; key; key = key->next)
  36       if (key->value && key->destr_func)
  37         {
  38           void *v = key->value;
  39           key->value = NULL;
  40           key->destr_func (v);
  41           again = 1;
  42         }
  43   } while (again);
  44 }
  45
  46 int
  47 scm_i_pthread_key_create (scm_i_pthread_key_t *key,
  48                           void (*destr_func) (void *))
  49 {
  50   if (all_keys == NULL)
  51     atexit (destroy_keys);
  52
  53   key->next = all_keys;
  54   all_keys = key;
  55   key->value = NULL;
  56   key->destr_func = destr_func;
  57
  58   return 0;
  59 }
  60
  61 #endif /* SCM_USE_NULL_THREADS */
  62
  63
  64 /*
  65   Local Variables:
  66   c-file-style: "gnu"
  67   End:
  68 */