glibc/locale/duplocale.c
Ulrich Drepper 9a69db292a [BZ #5443]
2008-03-30  Ulrich Drepper  <drepper@redhat.com>
	[BZ #5443]
	* intl/dcigettext.c (__dcigettext): Get reader lock for locale data
	before looking for translation.
	* locale/duplocale.c: Transform __libc_setlocale_lock into rwlock.
	* locale/freelocale.c: Likewise.
	* locale/newlocale.c: Likewise.
	* locale/setlocale.c: Likewise.
	Based partially on a patch by ryo@np.css.fujitsu.com.
2008-03-31 00:38:06 +00:00

87 lines
2.7 KiB
C

/* Duplicate handle for selection of locales.
Copyright (C) 1997,2000,2001,2002,2005,2008 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <locale.h>
#include <bits/libc-lock.h>
#include <stdlib.h>
#include <string.h>
#include <localeinfo.h>
/* Lock for protecting global data. */
__libc_rwlock_define (extern , __libc_setlocale_lock attribute_hidden)
__locale_t
__duplocale (__locale_t dataset)
{
/* This static object is returned for newlocale (LC_ALL_MASK, "C"). */
if (dataset == _nl_C_locobj_ptr)
return dataset;
__locale_t result;
int cnt;
size_t names_len = 0;
/* Calculate the total space we need to store all the names. */
for (cnt = 0; cnt < __LC_LAST; ++cnt)
if (cnt != LC_ALL && dataset->__names[cnt] != _nl_C_name)
names_len += strlen (dataset->__names[cnt]) + 1;
/* Get memory. */
result = malloc (sizeof (struct __locale_struct) + names_len);
if (result != NULL)
{
char *namep = (char *) (result + 1);
/* We modify global data (the usage counts). */
__libc_rwlock_wrlock (__libc_setlocale_lock);
for (cnt = 0; cnt < __LC_LAST; ++cnt)
if (cnt != LC_ALL)
{
result->__locales[cnt] = dataset->__locales[cnt];
if (result->__locales[cnt]->usage_count < MAX_USAGE_COUNT)
++result->__locales[cnt]->usage_count;
if (dataset->__names[cnt] == _nl_C_name)
result->__names[cnt] = _nl_C_name;
else
{
result->__names[cnt] = namep;
namep = __stpcpy (namep, dataset->__names[cnt]) + 1;
}
}
/* Update the special members. */
result->__ctype_b = dataset->__ctype_b;
result->__ctype_tolower = dataset->__ctype_tolower;
result->__ctype_toupper = dataset->__ctype_toupper;
/* It's done. */
__libc_rwlock_unlock (__libc_setlocale_lock);
}
return result;
}
weak_alias (__duplocale, duplocale)