mirror of https://github.com/CGAL/cgal
129 lines
3.3 KiB
C++
129 lines
3.3 KiB
C++
// Copyright (c) 2007-08 INRIA Sophia-Antipolis (France).
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// All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org).
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// You can redistribute it and/or modify it under the terms of the GNU
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// General Public License as published by the Free Software Foundation,
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// either version 3 of the License, or (at your option) any later version.
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//
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// Licensees holding a valid commercial license may use this file in
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// accordance with the commercial license agreement provided with the software.
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//
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// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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//
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// $URL$
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// $Id$
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//
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// Author(s) : Laurent Saboret
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#ifndef CGAL_WIN32_EXCEPTION_H
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#define CGAL_WIN32_EXCEPTION_H
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#include <exception>
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#include <windows.h>
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#include <eh.h>
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namespace CGAL {
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// C++ class wrapping a Win32 structured exception.
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class Win32_exception
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{
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// Data
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private:
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unsigned int m_seNumber;
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// Public operations
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public:
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Win32_exception(unsigned int structuredExceptionNumber)
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: m_seNumber(structuredExceptionNumber)
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{}
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unsigned int getStructuredExceptionNumber() const { return m_seNumber; }
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};
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/// \internal
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/// Class Win32_exception_handler:
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/// - Translate Win32 structured exceptions to C++ exceptions.
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/// - Protect application against stack overflow using _resetstkoflw()
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/// (see http://msdn.microsoft.com/en-us/library/89f73td2(VS.80).aspx).
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///
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/// Caution: requires /EHa compilation option.
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class Win32_exception_handler
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{
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// Data
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private:
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_se_translator_function m_previous_translator;
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// Public operations
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public:
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Win32_exception_handler()
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{
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// Protect application against next stack overflow
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if (needs_stack_reset(false))
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{
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std::cerr << "Win32_exception_handler: reset stack using _resetstkoflw()\n";
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if(!_resetstkoflw())
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{
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std::cerr << "Win32_exception_handler: _resetstkoflw() failed, exiting!\n";
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abort();
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}
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}
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// Set up a function to handle win32 exceptions,
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// including stack overflow exceptions.
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m_previous_translator = _set_se_translator(translate);
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}
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~Win32_exception_handler()
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{
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// Do not call _resetstkoflw() in this function!
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// Restore previous win32 exceptions handler
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_set_se_translator(m_previous_translator);
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}
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// Private operations
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private:
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// Translate Win32 structured exceptions to C++ exceptions
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static
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void __cdecl translate(unsigned int code, _EXCEPTION_POINTERS*)
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{
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// For stack overflow exceptions, set m_needs_stack_reset.
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// Use minimal stack space in this function.
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// Do not call _resetstkoflw() in this function!
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if (code == EXCEPTION_STACK_OVERFLOW)
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{
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std::cerr << "Win32_exception_handler: stack overflow!\n";
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needs_stack_reset(true);
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}
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// Throw our own C++ exception object
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throw Win32_exception(code);
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}
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// This method is a trick to allocate a global variable in a header file:
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// - get the previous value of m_needs_stack_reset
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// - set the new value of m_needs_stack_reset
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static
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bool needs_stack_reset(bool new_value)
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{
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// default value
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static bool m_needs_stack_reset = false;
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bool previous_value = m_needs_stack_reset;
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m_needs_stack_reset = new_value;
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return previous_value;
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}
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};
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} //namespace CGAL
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#endif // CGAL_WIN32_EXCEPTION_H
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