3 // Copyright (C) 2008, 2009 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
11 // This 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
14 // GNU General Public License for more details.
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
27 #if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)
28 #ifndef _GLIBCXX_HAVE_TLS
34 static std::mutex once_mutex;
42 const defer_lock_t defer_lock = defer_lock_t();
43 const try_to_lock_t try_to_lock = try_to_lock_t();
44 const adopt_lock_t adopt_lock = adopt_lock_t();
47 lock_error::what() const throw()
48 { return "std::lock_error"; }
50 #ifdef _GLIBCXX_HAVE_TLS
51 __thread void* __once_callable;
52 __thread void (*__once_call)();
54 // Explicit instantiation due to -fno-implicit-instantiation.
55 template class function<void()>;
56 function<void()> __once_functor;
59 __get_once_functor_lock()
61 static unique_lock<mutex> once_functor_lock(get_once_mutex(), defer_lock);
62 return once_functor_lock;
70 #ifndef _GLIBCXX_HAVE_TLS
71 function<void()> __once_call = std::move(__once_functor);
72 __get_once_functor_lock().unlock();
79 #endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1