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// Exception Handling support header (exception_ptr class) for -*- C++ -*-
// Copyright (C) 2008, 2009 Free Software Foundation
//
// 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 3, 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.
//
// 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/>.
/** @file exception_ptr.h
* This is an internal header file, included by other headers and the
* implementation. You should not attempt to use it directly.
*/
#ifndef _EXCEPTION_PTR_H
#define _EXCEPTION_PTR_H
#pragma GCC visibility push(default)
#include <bits/c++config.h>
#include <exception_defines.h>
#if !defined(_GLIBCXX_ATOMIC_BUILTINS_4)
# error This platform does not support exception propagation.
#endif
extern "C++" {
namespace std
{
class type_info;
/**
* @addtogroup exceptions
* @{
*/
// Hide the free operators from other types
namespace __exception_ptr
{
/**
* @brief An opaque pointer to an arbitrary exception.
*/
class exception_ptr;
}
using __exception_ptr::exception_ptr;
/** Obtain an %exception_ptr to the currently handled exception. If there
* is none, or the currently handled exception is foreign, return the null
* value.
*/
exception_ptr current_exception() throw();
/// Throw the object pointed to by the %exception_ptr.
void rethrow_exception(exception_ptr) __attribute__ ((__noreturn__));
/// Obtain an %exception_ptr pointing to a copy of the supplied object.
template<typename _Ex>
exception_ptr
copy_exception(_Ex __ex) throw();
namespace __exception_ptr
{
bool
operator==(const exception_ptr&, const exception_ptr&) throw();
bool
operator!=(const exception_ptr&, const exception_ptr&) throw();
class exception_ptr
{
void* _M_exception_object;
explicit exception_ptr(void* __e) throw();
void _M_addref() throw();
void _M_release() throw();
void *_M_get() const throw();
void _M_safe_bool_dummy();
friend exception_ptr std::current_exception() throw();
friend void std::rethrow_exception(exception_ptr);
public:
exception_ptr() throw();
typedef void (exception_ptr::*__safe_bool)();
// For construction from nullptr or 0.
exception_ptr(__safe_bool) throw();
exception_ptr(const exception_ptr&) throw();
#ifdef __GXX_EXPERIMENTAL_CXX0X__
exception_ptr(exception_ptr&& __o) throw()
: _M_exception_object(__o._M_exception_object)
{ __o._M_exception_object = 0; }
#endif
exception_ptr&
operator=(const exception_ptr&) throw();
#ifdef __GXX_EXPERIMENTAL_CXX0X__
exception_ptr&
operator=(exception_ptr&& __o) throw()
{
exception_ptr(static_cast<exception_ptr&&>(__o)).swap(*this);
return *this;
}
#endif
~exception_ptr() throw();
void
swap(exception_ptr&) throw();
#ifdef _GLIBCXX_EH_PTR_COMPAT
// Retained for compatibility with CXXABI_1.3.
bool operator!() const throw();
operator __safe_bool() const throw();
#endif
friend bool
operator==(const exception_ptr&, const exception_ptr&) throw();
const class std::type_info*
__cxa_exception_type() const throw();
};
} // namespace __exception_ptr
template<typename _Ex>
exception_ptr
copy_exception(_Ex __ex) throw()
{
__try
{
throw __ex;
}
__catch(...)
{
return current_exception ();
}
}
// @} group exceptions
} // namespace std
} // extern "C++"
#pragma GCC visibility pop
#endif
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