-// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
+// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
+// 2009, 2010
// Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
-// Free Software Foundation; either version 2, or (at your option)
+// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
-// You should have received a copy of the GNU General Public License along
-// with this library; see the file COPYING. If not, write to the Free
-// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
-// USA.
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
-// As a special exception, you may use this file as part of a free software
-// library without restriction. Specifically, if other files instantiate
-// templates or use macros or inline functions from this file, or you compile
-// this file and link it with other files to produce an executable, this
-// file does not by itself cause the resulting executable to be covered by
-// the GNU General Public License. This exception does not however
-// invalidate any other reasons why the executable file might be covered by
-// the GNU General Public License.
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
#include <clocale>
#include <cstring>
#include <cctype>
#include <cwctype> // For towupper, etc.
#include <locale>
-#include <bits/atomicity.h>
-#include <bits/concurrence.h>
+#include <ext/concurrence.h>
-namespace __gnu_internal
+namespace
{
- // Defined in globals.cc.
- extern std::locale c_locale;
- extern std::locale::_Impl c_locale_impl;
-
- extern std::locale::facet* facet_vec[_GLIBCXX_NUM_FACETS];
- extern char* name_vec[6 + _GLIBCXX_NUM_CATEGORIES];
- extern char name_c[6 + _GLIBCXX_NUM_CATEGORIES][2];
-
- extern std::ctype<char> ctype_c;
- extern std::collate<char> collate_c;
- extern std::numpunct<char> numpunct_c;
- extern std::num_get<char> num_get_c;
- extern std::num_put<char> num_put_c;
- extern std::codecvt<char, char, mbstate_t> codecvt_c;
- extern std::moneypunct<char, false> moneypunct_cf;
- extern std::moneypunct<char, true> moneypunct_ct;
- extern std::money_get<char> money_get_c;
- extern std::money_put<char> money_put_c;
- extern std::__timepunct<char> timepunct_c;
- extern std::time_get<char> time_get_c;
- extern std::time_put<char> time_put_c;
- extern std::messages<char> messages_c;
-#ifdef _GLIBCXX_USE_WCHAR_T
- extern std::ctype<wchar_t> ctype_w;
- extern std::collate<wchar_t> collate_w;
- extern std::numpunct<wchar_t> numpunct_w;
- extern std::num_get<wchar_t> num_get_w;
- extern std::num_put<wchar_t> num_put_w;
- extern std::codecvt<wchar_t, char, mbstate_t> codecvt_w;
- extern std::moneypunct<wchar_t, false> moneypunct_wf;
- extern std::moneypunct<wchar_t, true> moneypunct_wt;
- extern std::money_get<wchar_t> money_get_w;
- extern std::money_put<wchar_t> money_put_w;
- extern std::__timepunct<wchar_t> timepunct_w;
- extern std::time_get<wchar_t> time_get_w;
- extern std::time_put<wchar_t> time_put_w;
- extern std::messages<wchar_t> messages_w;
-#endif
+ __gnu_cxx::__mutex&
+ get_locale_mutex()
+ {
+ static __gnu_cxx::__mutex locale_mutex;
+ return locale_mutex;
+ }
+
+ using namespace std;
+
+ typedef char fake_locale_Impl[sizeof(locale::_Impl)]
+ __attribute__ ((aligned(__alignof__(locale::_Impl))));
+ fake_locale_Impl c_locale_impl;
+
+ typedef char fake_locale[sizeof(locale)]
+ __attribute__ ((aligned(__alignof__(locale))));
+ fake_locale c_locale;
+
+ typedef char fake_name_vec[sizeof(char*)]
+ __attribute__ ((aligned(__alignof__(char*))));
+ fake_name_vec name_vec[6 + _GLIBCXX_NUM_CATEGORIES];
+
+ typedef char fake_names[sizeof(char[2])]
+ __attribute__ ((aligned(__alignof__(char[2]))));
+ fake_names name_c[6 + _GLIBCXX_NUM_CATEGORIES];
+
+ typedef char fake_facet_vec[sizeof(locale::facet*)]
+ __attribute__ ((aligned(__alignof__(locale::facet*))));
+ fake_facet_vec facet_vec[_GLIBCXX_NUM_FACETS];
+
+ typedef char fake_cache_vec[sizeof(locale::facet*)]
+ __attribute__ ((aligned(__alignof__(locale::facet*))));
+ fake_cache_vec cache_vec[_GLIBCXX_NUM_FACETS];
+
+ typedef char fake_ctype_c[sizeof(std::ctype<char>)]
+ __attribute__ ((aligned(__alignof__(std::ctype<char>))));
+ fake_ctype_c ctype_c;
+
+ typedef char fake_collate_c[sizeof(std::collate<char>)]
+ __attribute__ ((aligned(__alignof__(std::collate<char>))));
+ fake_collate_c collate_c;
+
+ typedef char fake_numpunct_c[sizeof(numpunct<char>)]
+ __attribute__ ((aligned(__alignof__(numpunct<char>))));
+ fake_numpunct_c numpunct_c;
+
+ typedef char fake_num_get_c[sizeof(num_get<char>)]
+ __attribute__ ((aligned(__alignof__(num_get<char>))));
+ fake_num_get_c num_get_c;
+
+ typedef char fake_num_put_c[sizeof(num_put<char>)]
+ __attribute__ ((aligned(__alignof__(num_put<char>))));
+ fake_num_put_c num_put_c;
+
+ typedef char fake_codecvt_c[sizeof(codecvt<char, char, mbstate_t>)]
+ __attribute__ ((aligned(__alignof__(codecvt<char, char, mbstate_t>))));
+ fake_codecvt_c codecvt_c;
+
+ typedef char fake_moneypunct_c[sizeof(moneypunct<char, true>)]
+ __attribute__ ((aligned(__alignof__(moneypunct<char, true>))));
+ fake_moneypunct_c moneypunct_ct;
+ fake_moneypunct_c moneypunct_cf;
+
+ typedef char fake_money_get_c[sizeof(money_get<char>)]
+ __attribute__ ((aligned(__alignof__(money_get<char>))));
+ fake_money_get_c money_get_c;
+
+ typedef char fake_money_put_c[sizeof(money_put<char>)]
+ __attribute__ ((aligned(__alignof__(money_put<char>))));
+ fake_money_put_c money_put_c;
+
+ typedef char fake_timepunct_c[sizeof(__timepunct<char>)]
+ __attribute__ ((aligned(__alignof__(__timepunct<char>))));
+ fake_timepunct_c timepunct_c;
+
+ typedef char fake_time_get_c[sizeof(time_get<char>)]
+ __attribute__ ((aligned(__alignof__(time_get<char>))));
+ fake_time_get_c time_get_c;
+
+ typedef char fake_time_put_c[sizeof(time_put<char>)]
+ __attribute__ ((aligned(__alignof__(time_put<char>))));
+ fake_time_put_c time_put_c;
+
+ typedef char fake_messages_c[sizeof(messages<char>)]
+ __attribute__ ((aligned(__alignof__(messages<char>))));
+ fake_messages_c messages_c;
- // And the caches....
- extern std::locale::facet* cache_vec[_GLIBCXX_NUM_FACETS];
- extern std::__numpunct_cache<char> numpunct_cache_c;
- extern std::__moneypunct_cache<char, false> moneypunct_cache_cf;
- extern std::__moneypunct_cache<char, true> moneypunct_cache_ct;
- extern std::__timepunct_cache<char> timepunct_cache_c;
#ifdef _GLIBCXX_USE_WCHAR_T
- extern std::__numpunct_cache<wchar_t> numpunct_cache_w;
- extern std::__moneypunct_cache<wchar_t, false> moneypunct_cache_wf;
- extern std::__moneypunct_cache<wchar_t, true> moneypunct_cache_wt;
- extern std::__timepunct_cache<wchar_t> timepunct_cache_w;
+ typedef char fake_wtype_w[sizeof(std::ctype<wchar_t>)]
+ __attribute__ ((aligned(__alignof__(std::ctype<wchar_t>))));
+ fake_wtype_w ctype_w;
+
+ typedef char fake_wollate_w[sizeof(std::collate<wchar_t>)]
+ __attribute__ ((aligned(__alignof__(std::collate<wchar_t>))));
+ fake_wollate_w collate_w;
+
+ typedef char fake_numpunct_w[sizeof(numpunct<wchar_t>)]
+ __attribute__ ((aligned(__alignof__(numpunct<wchar_t>))));
+ fake_numpunct_w numpunct_w;
+
+ typedef char fake_num_get_w[sizeof(num_get<wchar_t>)]
+ __attribute__ ((aligned(__alignof__(num_get<wchar_t>))));
+ fake_num_get_w num_get_w;
+
+ typedef char fake_num_put_w[sizeof(num_put<wchar_t>)]
+ __attribute__ ((aligned(__alignof__(num_put<wchar_t>))));
+ fake_num_put_w num_put_w;
+
+ typedef char fake_wodecvt_w[sizeof(codecvt<wchar_t, char, mbstate_t>)]
+ __attribute__ ((aligned(__alignof__(codecvt<wchar_t, char, mbstate_t>))));
+ fake_wodecvt_w codecvt_w;
+
+ typedef char fake_moneypunct_w[sizeof(moneypunct<wchar_t, true>)]
+ __attribute__ ((aligned(__alignof__(moneypunct<wchar_t, true>))));
+ fake_moneypunct_w moneypunct_wt;
+ fake_moneypunct_w moneypunct_wf;
+
+ typedef char fake_money_get_w[sizeof(money_get<wchar_t>)]
+ __attribute__ ((aligned(__alignof__(money_get<wchar_t>))));
+ fake_money_get_w money_get_w;
+
+ typedef char fake_money_put_w[sizeof(money_put<wchar_t>)]
+ __attribute__ ((aligned(__alignof__(money_put<wchar_t>))));
+ fake_money_put_w money_put_w;
+
+ typedef char fake_timepunct_w[sizeof(__timepunct<wchar_t>)]
+ __attribute__ ((aligned(__alignof__(__timepunct<wchar_t>))));
+ fake_timepunct_w timepunct_w;
+
+ typedef char fake_time_get_w[sizeof(time_get<wchar_t>)]
+ __attribute__ ((aligned(__alignof__(time_get<wchar_t>))));
+ fake_time_get_w time_get_w;
+
+ typedef char fake_time_put_w[sizeof(time_put<wchar_t>)]
+ __attribute__ ((aligned(__alignof__(time_put<wchar_t>))));
+ fake_time_put_w time_put_w;
+
+ typedef char fake_messages_w[sizeof(messages<wchar_t>)]
+ __attribute__ ((aligned(__alignof__(messages<wchar_t>))));
+ fake_messages_w messages_w;
#endif
- // Mutex object for locale initialization.
- __glibcxx_mutex_define_initialized(locale_mutex);
-} // namespace __gnu_internal
+ // Storage for "C" locale caches.
+ typedef char fake_num_cache_c[sizeof(std::__numpunct_cache<char>)]
+ __attribute__ ((aligned(__alignof__(std::__numpunct_cache<char>))));
+ fake_num_cache_c numpunct_cache_c;
-namespace std
+ typedef char fake_money_cache_c[sizeof(std::__moneypunct_cache<char, true>)]
+ __attribute__ ((aligned(__alignof__(std::__moneypunct_cache<char, true>))));
+ fake_money_cache_c moneypunct_cache_ct;
+ fake_money_cache_c moneypunct_cache_cf;
+
+ typedef char fake_time_cache_c[sizeof(std::__timepunct_cache<char>)]
+ __attribute__ ((aligned(__alignof__(std::__timepunct_cache<char>))));
+ fake_time_cache_c timepunct_cache_c;
+
+#ifdef _GLIBCXX_USE_WCHAR_T
+ typedef char fake_num_cache_w[sizeof(std::__numpunct_cache<wchar_t>)]
+ __attribute__ ((aligned(__alignof__(std::__numpunct_cache<wchar_t>))));
+ fake_num_cache_w numpunct_cache_w;
+
+ typedef char fake_money_cache_w[sizeof(std::__moneypunct_cache<wchar_t,true>)]
+ __attribute__ ((aligned(__alignof__(std::__moneypunct_cache<wchar_t,true>))));
+ fake_money_cache_w moneypunct_cache_wt;
+ fake_money_cache_w moneypunct_cache_wf;
+
+ typedef char fake_time_cache_w[sizeof(std::__timepunct_cache<wchar_t>)]
+ __attribute__ ((aligned(__alignof__(std::__timepunct_cache<wchar_t>))));
+ fake_time_cache_w timepunct_cache_w;
+#endif
+} // anonymous namespace
+
+namespace std _GLIBCXX_VISIBILITY(default)
{
- using namespace __gnu_internal;
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
locale::locale() throw() : _M_impl(0)
{
_S_initialize();
- __gnu_cxx::lock sentry(__gnu_internal::locale_mutex);
- _S_global->_M_add_reference();
+
+ // Checked locking to optimize the common case where _S_global
+ // still points to _S_classic (locale::_S_initialize_once()):
+ // - If they are the same, just increment the reference count and
+ // we are done. This effectively constructs a C locale object
+ // identical to the static c_locale.
+ // - Otherwise, _S_global can and may be destroyed due to
+ // locale::global() call on another thread, in which case we
+ // fall back to lock protected access to both _S_global and
+ // its reference count.
_M_impl = _S_global;
+ if (_M_impl == _S_classic)
+ _M_impl->_M_add_reference();
+ else
+ {
+ __gnu_cxx::__scoped_lock sentry(get_locale_mutex());
+ _S_global->_M_add_reference();
+ _M_impl = _S_global;
+ }
}
locale
_S_initialize();
_Impl* __old;
{
- __gnu_cxx::lock sentry(__gnu_internal::locale_mutex);
+ __gnu_cxx::__scoped_lock sentry(get_locale_mutex());
__old = _S_global;
__other._M_impl->_M_add_reference();
_S_global = __other._M_impl;
const locale&
locale::classic()
- {
+ {
_S_initialize();
- return c_locale;
+ return *(new (&c_locale) locale(_S_classic));
}
void
- locale::_S_initialize_once()
+ locale::_S_initialize_once() throw()
{
// 2 references.
// One reference for _S_classic, one for _S_global
_S_classic = new (&c_locale_impl) _Impl(2);
_S_global = _S_classic;
- new (&c_locale) locale(_S_classic);
}
void
_M_caches[__timepunct<wchar_t>::id._M_id()] = __tpw;
#endif
}
-} // namespace std
+
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
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