wut/libraries/wutstdc++/future.cc

63 lines
2.0 KiB
C++

// future -*- C++ -*-
// Copyright (C) 2009-2018 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 3, 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.
// 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.
// 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 <future>
#include <bits/functexcept.h>
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
#if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)
__future_base::_Result_base::_Result_base() = default;
__future_base::_Result_base::~_Result_base() = default;
void
__future_base::_State_baseV2::_Make_ready::_S_run(void* p)
{
unique_ptr<_Make_ready> mr{static_cast<_Make_ready*>(p)};
if (auto state = mr->_M_shared_state.lock())
{
// Use release MO to synchronize with observers of the ready state.
state->_M_status._M_store_notify_all(_Status::__ready,
memory_order_release);
}
}
// defined in src/c++11/condition_variable.cc
extern void
__at_thread_exit(__at_thread_exit_elt* elt);
void
__future_base::_State_baseV2::_Make_ready::_M_set()
{
_M_cb = &_Make_ready::_S_run;
__at_thread_exit(this);
}
#endif
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std