-// -*- C++ -*- Implement the members of exception_ptr.
-// Copyright (C) 2008 Free Software Foundation, Inc.
-//
-// This file is part of GCC.
-//
-// GCC 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.
-//
-// GCC 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 GCC; 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 <bits/c++config.h>
-#include <exception>
-#include <exception_ptr.h>
-#include "unwind-cxx.h"
-
-using namespace __cxxabiv1;
-
-
-std::__exception_ptr::exception_ptr::exception_ptr() throw()
- : _M_exception_object(0)
-{
-}
-
-
-std::__exception_ptr::exception_ptr::exception_ptr(void* obj) throw()
- : _M_exception_object(obj)
-{
- _M_addref();
-}
-
-
-std::__exception_ptr::exception_ptr::exception_ptr(__safe_bool) throw()
- : _M_exception_object(0)
-{
-}
-
-
-std::__exception_ptr::exception_ptr::exception_ptr(
- const exception_ptr& other) throw()
- : _M_exception_object(other._M_exception_object)
-{
- _M_addref();
-}
-
-
-std::__exception_ptr::exception_ptr::~exception_ptr() throw()
-{
- _M_release();
-}
-
-
-std::__exception_ptr::exception_ptr&
-std::__exception_ptr::exception_ptr::operator=(
- const exception_ptr& other) throw()
-{
- exception_ptr(other).swap(*this);
- return *this;
-}
-
-
-void
-std::__exception_ptr::exception_ptr::_M_addref() throw()
-{
- if (_M_exception_object)
- {
- __cxa_exception *eh =
- __get_exception_header_from_obj (_M_exception_object);
- __gnu_cxx::__atomic_add_dispatch (&eh->referenceCount, 1);
- }
-}
-
-
-void
-std::__exception_ptr::exception_ptr::_M_release() throw()
-{
- if (_M_exception_object)
- {
- __cxa_exception *eh =
- __get_exception_header_from_obj (_M_exception_object);
- if (__gnu_cxx::__exchange_and_add_dispatch (&eh->referenceCount, -1) == 0)
- {
- if (eh->exceptionDestructor)
- eh->exceptionDestructor (_M_exception_object);
-
- __cxa_free_exception (_M_exception_object);
- _M_exception_object = 0;
- }
- }
-}
-
-
-void*
-std::__exception_ptr::exception_ptr::_M_get() const throw()
-{
- return _M_exception_object;
-}
-
-
-void
-std::__exception_ptr::exception_ptr::_M_safe_bool_dummy()
-{
-}
-
-
-void
-std::__exception_ptr::exception_ptr::swap(exception_ptr &other) throw()
-{
- void *tmp = _M_exception_object;
- _M_exception_object = other._M_exception_object;
- other._M_exception_object = tmp;
-}
-
-
-bool
-std::__exception_ptr::exception_ptr::operator!() const throw()
-{
- return _M_exception_object == 0;
-}
-
-
-std::__exception_ptr::exception_ptr::operator __safe_bool() const throw()
-{
- return _M_exception_object ? &exception_ptr::_M_safe_bool_dummy : 0;
-}
-
-
-const std::type_info*
-std::__exception_ptr::exception_ptr::__cxa_exception_type() const throw()
-{
- __cxa_exception *eh = __get_exception_header_from_obj (_M_exception_object);
- return eh->exceptionType;
-}
-
-
-bool std::__exception_ptr::operator==(const exception_ptr& lhs,
- const exception_ptr& rhs) throw()
-{
- return lhs._M_exception_object == rhs._M_exception_object;
-}
-
-
-bool std::__exception_ptr::operator!=(const exception_ptr& lhs,
- const exception_ptr& rhs) throw()
-{
- return !(lhs == rhs);
-}
-
-
-std::exception_ptr
-std::current_exception() throw()
-{
- __cxa_eh_globals *globals = __cxa_get_globals ();
- __cxa_exception *header = globals->caughtExceptions;
-
- if (!header)
- return std::exception_ptr();
-
- // Since foreign exceptions can't be counted, we can't return them.
- if (!__is_gxx_exception_class (header->unwindHeader.exception_class))
- return std::exception_ptr();
-
- return std::exception_ptr(
- __get_object_from_ambiguous_exception (header));
-}
-
-
-static void
-__gxx_dependent_exception_cleanup (_Unwind_Reason_Code code,
- _Unwind_Exception *exc)
-{
- // This cleanup is set only for dependents.
- __cxa_dependent_exception *dep = __get_dependent_exception_from_ue (exc);
- __cxa_exception *header =
- __get_exception_header_from_obj (dep->primaryException);
-
- // We only want to be called through _Unwind_DeleteException.
- // _Unwind_DeleteException in the HP-UX IA64 libunwind library
- // returns _URC_NO_REASON and not _URC_FOREIGN_EXCEPTION_CAUGHT
- // like the GCC _Unwind_DeleteException function does.
- if (code != _URC_FOREIGN_EXCEPTION_CAUGHT && code != _URC_NO_REASON)
- __terminate (header->terminateHandler);
-
- __cxa_free_dependent_exception (dep);
-
- if (__gnu_cxx::__exchange_and_add_dispatch (&header->referenceCount, -1) == 0)
- {
- if (header->exceptionDestructor)
- header->exceptionDestructor (header + 1);
-
- __cxa_free_exception (header + 1);
- }
-}
-
-
-void
-std::rethrow_exception(std::exception_ptr ep)
-{
- void *obj = ep._M_get();
- __cxa_exception *eh = __get_exception_header_from_obj (obj);
-
- __cxa_dependent_exception *dep = __cxa_allocate_dependent_exception ();
- dep->primaryException = obj;
- __gnu_cxx::__atomic_add_dispatch (&eh->referenceCount, 1);
-
- dep->unexpectedHandler = __unexpected_handler;
- dep->terminateHandler = __terminate_handler;
- __GXX_INIT_DEPENDENT_EXCEPTION_CLASS(dep->unwindHeader.exception_class);
- dep->unwindHeader.exception_cleanup = __gxx_dependent_exception_cleanup;
-
-#ifdef _GLIBCXX_SJLJ_EXCEPTIONS
- _Unwind_SjLj_RaiseException (&dep->unwindHeader);
-#else
- _Unwind_RaiseException (&dep->unwindHeader);
-#endif
-
- // Some sort of unwinding error. Note that terminate is a handler.
- __cxa_begin_catch (&dep->unwindHeader);
- std::terminate ();
-}