Subversion Repositories openrisc

// 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

{

  /**

   * @addtogroup exceptions

   * @{

   */

  namespace __exception_ptr

  {

    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__));

  namespace __exception_ptr

  {

    /**

     *  @brief An opaque pointer to an arbitrary exception.

     *  @ingroup exceptions

     */

    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() __attribute__ ((__pure__));

      void _M_safe_bool_dummy() throw() __attribute__ ((__const__));

      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() __attribute__ ((__pure__));

      operator __safe_bool() const throw();

#endif

      friend bool

      operator==(const exception_ptr&, const exception_ptr&) throw()

      __attribute__ ((__pure__));

      const type_info*

      __cxa_exception_type() const throw() __attribute__ ((__pure__));

    };

    bool

    operator==(const exception_ptr&, const exception_ptr&) throw()

    __attribute__ ((__pure__));

    bool

    operator!=(const exception_ptr&, const exception_ptr&) throw()

    __attribute__ ((__pure__));

  } // namespace __exception_ptr

  /// Obtain an exception_ptr pointing to a copy of the supplied object.

  template<typename _Ex>

    exception_ptr

    copy_exception(_Ex __ex) throw()

    {

      __try

        {

#ifdef __EXCEPTIONS

          throw __ex;

#endif

        }

      __catch(...)

        {

          return current_exception();

        }

    }

  // @} group exceptions

} // namespace std

} // extern "C++"

#pragma GCC visibility pop

#endif