locale/freelocale.c

   1 /* Free data allocated by a call to setlocale_r
   2    Copyright (C) 1996-2022 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <locale.h>
  20 #include <stdlib.h>
  21 #include <libc-lock.h>
  22
  23 #include "localeinfo.h"
  24
  25
  26 /* Lock for protecting global data.  */
  27 __libc_rwlock_define (extern , __libc_setlocale_lock attribute_hidden)
  28
  29
  30 void
  31 __freelocale (locale_t dataset)
  32 {
  33   int cnt;
  34
  35   /* This static object is returned for newlocale (LC_ALL_MASK, "C").  */
  36   if (dataset == _nl_C_locobj_ptr)
  37     return;
  38
  39   /* We modify global data (the usage counts).  */
  40   __libc_rwlock_wrlock (__libc_setlocale_lock);
  41
  42   for (cnt = 0; cnt < __LC_LAST; ++cnt)
  43     if (cnt != LC_ALL && dataset->__locales[cnt]->usage_count != UNDELETABLE)
  44       /* We can remove the data.  */
  45       _nl_remove_locale (cnt, dataset->__locales[cnt]);
  46
  47   /* It's done.  */
  48   __libc_rwlock_unlock (__libc_setlocale_lock);
  49
  50   /* Free the locale_t handle itself.  */
  51   free (dataset);
  52 }
  53 weak_alias (__freelocale, freelocale)