133 lines
3.1 KiB
C++
133 lines
3.1 KiB
C++
// -*- C++ -*- std::terminate, std::unexpected and friends.
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// Copyright (C) 1994-2020 Free Software Foundation, Inc.
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//
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// This file is part of GCC.
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//
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// GCC is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 3, or (at your option)
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// any later version.
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//
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// GCC 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
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// GNU General Public License for more details.
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//
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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#include "typeinfo"
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#include "exception"
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#include <cstdlib>
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#include "unwind-cxx.h"
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#include "eh_term_handler.h"
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#include <bits/exception_defines.h>
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#include <bits/atomic_lockfree_defines.h>
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#if ATOMIC_POINTER_LOCK_FREE < 2
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#include <ext/concurrence.h>
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namespace
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{
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__gnu_cxx::__mutex mx;
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}
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#endif
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using namespace __cxxabiv1;
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void
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__cxxabiv1::__terminate (std::terminate_handler handler) throw ()
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{
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__try
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{
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handler ();
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std::abort ();
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}
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__catch(...)
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{ std::abort (); }
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}
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void
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std::terminate () throw()
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{
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__terminate (get_terminate ());
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}
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void
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__cxxabiv1::__unexpected (std::unexpected_handler handler)
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{
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handler();
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std::terminate ();
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}
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void
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std::unexpected ()
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{
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__unexpected (get_unexpected ());
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}
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std::terminate_handler
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std::set_terminate (std::terminate_handler func) throw()
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{
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if (!func)
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func = _GLIBCXX_DEFAULT_TERM_HANDLER;
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std::terminate_handler old;
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#if ATOMIC_POINTER_LOCK_FREE > 1
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__atomic_exchange (&__terminate_handler, &func, &old, __ATOMIC_ACQ_REL);
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#else
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__gnu_cxx::__scoped_lock l(mx);
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old = __terminate_handler;
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__terminate_handler = func;
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#endif
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return old;
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}
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std::terminate_handler
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std::get_terminate () noexcept
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{
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std::terminate_handler func;
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#if ATOMIC_POINTER_LOCK_FREE > 1
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__atomic_load (&__terminate_handler, &func, __ATOMIC_ACQUIRE);
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#else
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__gnu_cxx::__scoped_lock l(mx);
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func = __terminate_handler;
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#endif
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return func;
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}
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std::unexpected_handler
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std::set_unexpected (std::unexpected_handler func) throw()
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{
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if (!func)
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func = std::terminate;
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std::unexpected_handler old;
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#if ATOMIC_POINTER_LOCK_FREE > 1
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__atomic_exchange (&__unexpected_handler, &func, &old, __ATOMIC_ACQ_REL);
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#else
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__gnu_cxx::__scoped_lock l(mx);
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old = __unexpected_handler;
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__unexpected_handler = func;
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#endif
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return old;
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}
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std::unexpected_handler
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std::get_unexpected () noexcept
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{
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std::unexpected_handler func;
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#if ATOMIC_POINTER_LOCK_FREE > 1
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__atomic_load (&__unexpected_handler, &func, __ATOMIC_ACQUIRE);
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#else
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__gnu_cxx::__scoped_lock l(mx);
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func = __unexpected_handler;
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#endif
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return func;
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}
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