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glibc  2.9
freelocale.c
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00001 /* Free data allocated by a call to setlocale_r
00002    Copyright (C) 1996,1997,2000,2002,2005,2008 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
00005 
00006    The GNU C Library is free software; you can redistribute it and/or
00007    modify it under the terms of the GNU Lesser General Public
00008    License as published by the Free Software Foundation; either
00009    version 2.1 of the License, or (at your option) any later version.
00010 
00011    The GNU C Library is distributed in the hope that it will be useful,
00012    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014    Lesser General Public License for more details.
00015 
00016    You should have received a copy of the GNU Lesser General Public
00017    License along with the GNU C Library; if not, write to the Free
00018    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00019    02111-1307 USA.  */
00020 
00021 #include <locale.h>
00022 #include <stdlib.h>
00023 #include <bits/libc-lock.h>
00024 
00025 #include "localeinfo.h"
00026 
00027 
00028 /* Lock for protecting global data.  */
00029 __libc_rwlock_define (extern , __libc_setlocale_lock attribute_hidden)
00030 
00031 
00032 void
00033 __freelocale (__locale_t dataset)
00034 {
00035   int cnt;
00036 
00037   /* This static object is returned for newlocale (LC_ALL_MASK, "C").  */
00038   if (dataset == _nl_C_locobj_ptr)
00039     return;
00040 
00041   /* We modify global data (the usage counts).  */
00042   __libc_rwlock_wrlock (__libc_setlocale_lock);
00043 
00044   for (cnt = 0; cnt < __LC_LAST; ++cnt)
00045     if (cnt != LC_ALL && dataset->__locales[cnt]->usage_count != UNDELETABLE)
00046       /* We can remove the data.  */
00047       _nl_remove_locale (cnt, dataset->__locales[cnt]);
00048 
00049   /* It's done.  */
00050   __libc_rwlock_unlock (__libc_setlocale_lock);
00051 
00052   /* Free the locale_t handle itself.  */
00053   free (dataset);
00054 }
00055 weak_alias (__freelocale, freelocale)