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1a0d874ed4
* locale/xlocale.c: Revert changes putting _nl_global_locale here. This file again just defines _nl_C_locobj. (_nl_C_locobj): Use a categories.def iterator in the initializer. * locale/global-locale.c: New file. Define _nl_global_locale here, using all weak references in the initializer. * locale/Makefile (aux): Add global-locale. * locale/localeinfo.h (_nl_global_locale, _NL_CURRENT_LOCALE): Make these unconditional, along with the tsd decl. [!SHARED && HAVE___THREAD && HAVE_WEAK_SYMBOLS] (NL_CURRENT_INDIRECT): Define it under these conditions. [NL_CURRENT_INDIRECT]: Test this instead of [! SHARED]. Don't declare _nl_current. Declare _nl_current_LC_FOO as `extern __thread struct locale_data *const *'. [NL_CURRENT_INDIRECT] (_NL_CURRENT_DATA, _NL_CURRENT, _NL_CURRENT_WSTR): Add indirection. [NL_CURRENT_INDIRECT] (_NL_CURRENT_DEFINE): Rewritten. Define the thread variable _nl_current_LC_FOO and also a special absolute symbol _nl_current_LC_FOO_used. * locale/uselocale.c (__uselocale) [NL_CURRENT_INDIRECT]: Set each _nl_current_LC_FOO symbol to point into the new locale, using weak references to test if _nl_current_LC_FOO_used was linked in. * locale/setlocale.c [! SHARED]: Replace this conditional ... [NL_CURRENT_INDIRECT]: ... with this one. (_nl_current, _nl_C): Variables removed. [NL_CURRENT_INDIRECT] (_nl_current_used): New variable, table of weak references to _nl_current_LC_FOO_used. [NL_CURRENT_INDIRECT] (CATEGORY_USED): Define using that table. (free_category): New function, broken out of ... (free_mem): ... here. Call that. (free_mem) [NL_CURRENT_INDIRECT]: Use a categories.def iterator instead of a loop. __USING_NAMESPACE_C99 depending on _GLIBCPP_USE_NAMESPACES.
71 lines
2.7 KiB
C
71 lines
2.7 KiB
C
/* uselocale -- fetch and set the current per-thread locale
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Copyright (C) 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <locale.h>
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#include "localeinfo.h"
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/* Switch the current thread's locale to DATASET.
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If DATASET is null, instead just return the current setting.
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The special value LC_GLOBAL_LOCALE is the initial setting
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for all threads, and means the thread uses the global
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setting controlled by `setlocale'. */
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locale_t
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__uselocale (locale_t newloc)
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{
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if (newloc == NULL)
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{
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locale_t loc = __libc_tsd_get (LOCALE);
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return loc == &_nl_global_locale ? LC_GLOBAL_LOCALE : loc;
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}
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else
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{
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const locale_t locobj
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= newloc == LC_GLOBAL_LOCALE ? &_nl_global_locale : newloc;
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__libc_tsd_set (LOCALE, locobj);
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#ifdef NL_CURRENT_INDIRECT
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/* Now we must update all the per-category thread-local variables to
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point into the new current locale for this thread. The magic
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symbols _nl_current_LC_FOO_used are defined to meaningless values
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if _nl_current_LC_FOO was linked in. By using weak references to
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both symbols and testing the address of _nl_current_LC_FOO_used,
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we can avoid accessing the _nl_current_LC_FOO thread-local
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variable at all when no code referring to it was linked in. We
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need the special bogus symbol because while TLS symbols can be
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weak, there is no reasonable way to test for the default-zero
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value as with a heap symbol (taking the address would just use
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some bogus offset from our thread pointer). */
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# define DEFINE_CATEGORY(category, category_name, items, a) \
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{ \
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extern char _nl_current_##category##_used; \
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weak_extern (_nl_current_##category##_used) \
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weak_extern (_nl_current_##category) \
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if (&_nl_current_##category##_used != 0) \
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_nl_current_##category = &locobj->__locales[category]; \
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}
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# include "categories.def"
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# undef DEFINE_CATEGORY
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#endif
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}
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return newloc;
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}
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weak_alias (__uselocale, uselocale)
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