locale/freelocale.c

   1 /* Free data allocated by a call to setlocale_r
   2    Copyright (C) 1996-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <locale.h>
  21 #include <stdlib.h>
  22 #include <libc-lock.h>
  23
  24 #include "localeinfo.h"
  25
  26
  27 /* Lock for protecting global data.  */
  28 __libc_rwlock_define (extern , __libc_setlocale_lock attribute_hidden)
  29
  30
  31 void
  32 __freelocale (locale_t dataset)
  33 {
  34   int cnt;
  35
  36   /* This static object is returned for newlocale (LC_ALL_MASK, "C").  */
  37   if (dataset == _nl_C_locobj_ptr)
  38     return;
  39
  40   /* We modify global data (the usage counts).  */
  41   __libc_rwlock_wrlock (__libc_setlocale_lock);
  42
  43   for (cnt = 0; cnt < __LC_LAST; ++cnt)
  44     if (cnt != LC_ALL && dataset->__locales[cnt]->usage_count != UNDELETABLE)
  45       /* We can remove the data.  */
  46       _nl_remove_locale (cnt, dataset->__locales[cnt]);
  47
  48   /* It's done.  */
  49   __libc_rwlock_unlock (__libc_setlocale_lock);
  50
  51   /* Free the locale_t handle itself.  */
  52   free (dataset);
  53 }
  54 weak_alias (__freelocale, freelocale)