172 lines
4.6 KiB
C++
172 lines
4.6 KiB
C++
// Exception Handling support header (exception_ptr class) for -*- C++ -*-
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// Copyright (C) 2008 Free Software Foundation
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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 2, 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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// You should have received a copy of the GNU General Public License
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// along with GCC; see the file COPYING. If not, write to
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// the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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// Boston, MA 02110-1301, USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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/** @file exception_ptr.h
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* This is an internal header file, included by other headers and the
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* implementation. You should not attempt to use it directly.
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*/
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#ifndef _EXCEPTION_PTR_H
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#define _EXCEPTION_PTR_H
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#pragma GCC visibility push(default)
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#include <bits/c++config.h>
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#if !defined(_GLIBCXX_ATOMIC_BUILTINS_4)
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# error This platform does not support exception propagation.
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#endif
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extern "C++" {
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namespace std
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{
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// Hide the free operators from other types
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namespace __exception_ptr
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{
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/**
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* @brief An opaque pointer to an arbitrary exception.
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*/
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class exception_ptr;
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}
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using __exception_ptr::exception_ptr;
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/** Obtain an %exception_ptr to the currently handled exception. If there
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* is none, or the currently handled exception is foreign, return the null
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* value.
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*/
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exception_ptr current_exception() throw();
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/// Throw the object pointed to by the %exception_ptr.
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void rethrow_exception(exception_ptr) __attribute__ ((__noreturn__));
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/// Obtain an %exception_ptr pointing to a copy of the supplied object.
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template <class _Ex>
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exception_ptr copy_exception(_Ex __ex) throw();
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namespace __exception_ptr
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{
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bool operator==(const exception_ptr&,
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const exception_ptr&) throw();
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bool operator!=(const exception_ptr&,
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const exception_ptr&) throw();
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class exception_ptr
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{
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void* _M_exception_object;
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explicit exception_ptr(void* __e) throw();
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void _M_addref() throw();
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void _M_release() throw();
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void *_M_get() const throw();
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void _M_safe_bool_dummy();
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friend exception_ptr std::current_exception() throw();
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friend void std::rethrow_exception(exception_ptr);
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public:
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exception_ptr() throw();
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typedef void (exception_ptr::*__safe_bool)();
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// For construction from nullptr or 0.
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exception_ptr(__safe_bool) throw();
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exception_ptr(const exception_ptr&) throw();
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#ifdef __GXX_EXPERIMENTAL_CXX0X__
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exception_ptr(exception_ptr&& __o) throw()
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: _M_exception_object(__o._M_exception_object)
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{
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__o._M_exception_object = 0;
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}
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#endif
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exception_ptr& operator=(const exception_ptr&) throw();
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#ifdef __GXX_EXPERIMENTAL_CXX0X__
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exception_ptr& operator=(exception_ptr&& __o) throw()
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{
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exception_ptr(__o).swap(*this);
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return *this;
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}
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#endif
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~exception_ptr() throw();
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void swap(exception_ptr&) throw();
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#ifdef __GXX_EXPERIMENTAL_CXX0X__
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void swap(exception_ptr &&__o) throw()
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{
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void *__tmp = _M_exception_object;
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_M_exception_object = __o._M_exception_object;
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__o._M_exception_object = __tmp;
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}
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#endif
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bool operator!() const throw();
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operator __safe_bool() const throw();
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friend bool operator==(const exception_ptr&,
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const exception_ptr&) throw();
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const type_info *__cxa_exception_type() const throw();
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};
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} // namespace __exception_ptr
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template <class _Ex>
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exception_ptr copy_exception(_Ex __ex) throw()
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{
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try
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{
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throw __ex;
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}
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catch(...)
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{
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return current_exception ();
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}
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}
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} // namespace std
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} // extern "C++"
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#pragma GCC visibility pop
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#endif
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