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// mutex -*- C++ -*-
// Copyright (C) 2008, 2009 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)
// any later version.
// This 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 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.
// 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.
#include <mutex>
#if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)
#ifndef _GLIBCXX_HAVE_TLS
namespace
{
std::mutex&
get_once_mutex()
{
static std::mutex once_mutex;
return once_mutex;
}
}
#endif
namespace std
{
const defer_lock_t defer_lock = defer_lock_t();
const try_to_lock_t try_to_lock = try_to_lock_t();
const adopt_lock_t adopt_lock = adopt_lock_t();
const char*
lock_error::what() const throw()
{ return "std::lock_error"; }
#ifdef _GLIBCXX_HAVE_TLS
__thread void* __once_callable;
__thread void (*__once_call)();
#else
// Explicit instantiation due to -fno-implicit-instantiation.
template class function<void()>;
function<void()> __once_functor;
unique_lock<mutex>&
__get_once_functor_lock()
{
static unique_lock<mutex> once_functor_lock(get_once_mutex(), defer_lock);
return once_functor_lock;
}
#endif
extern "C"
{
void __once_proxy()
{
#ifndef _GLIBCXX_HAVE_TLS
function<void()> __once_call = std::move(__once_functor);
__get_once_functor_lock().unlock();
#endif
__once_call();
}
}
}
#endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1
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