Chris@16: // Copyright David Abrahams 2002.
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See
Chris@16: // accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: #ifndef SCOPE_DWA2002724_HPP
Chris@16: # define SCOPE_DWA2002724_HPP
Chris@16: 
Chris@16: # include <boost/python/detail/prefix.hpp>
Chris@16: # include <boost/python/object.hpp>
Chris@16: # include <boost/python/refcount.hpp>
Chris@16: 
Chris@16: namespace boost { namespace python { 
Chris@16: 
Chris@16: namespace detail
Chris@16: {
Chris@16:   // Making this a namespace-scope variable to avoid Cygwin issues.
Chris@16:   // Use a PyObject* to avoid problems with static destruction after Py_Finalize
Chris@16:   extern BOOST_PYTHON_DECL PyObject* current_scope;
Chris@16: }
Chris@16: 
Chris@16: class scope
Chris@16:   : public object
Chris@16: {
Chris@16:  public:
Chris@16:     inline scope(scope const&);
Chris@16:     inline scope(object const&);
Chris@16:     inline scope();
Chris@16:     inline ~scope();
Chris@16:     
Chris@16:  private: // data members
Chris@16:     PyObject* m_previous_scope;
Chris@16: 
Chris@16:  private: // unimplemented functions
Chris@16:     void operator=(scope const&);
Chris@16: };
Chris@16: 
Chris@16: inline scope::scope(object const& new_scope)
Chris@16:     : object(new_scope)
Chris@16:     , m_previous_scope(detail::current_scope)
Chris@16: {
Chris@16:     detail::current_scope = python::incref(new_scope.ptr());
Chris@16: }
Chris@16: 
Chris@16: inline scope::scope()
Chris@16:     : object(detail::borrowed_reference(
Chris@16:                  detail::current_scope ? detail::current_scope : Py_None
Chris@16:                  ))
Chris@16:     , m_previous_scope(python::xincref(detail::current_scope))
Chris@16: {
Chris@16: }
Chris@16: 
Chris@16: inline scope::~scope()
Chris@16: {
Chris@16:     python::xdecref(detail::current_scope);
Chris@16:     detail::current_scope = m_previous_scope;
Chris@16: }
Chris@16: 
Chris@16: namespace converter
Chris@16: {
Chris@16:   template <>
Chris@16:   struct object_manager_traits<scope>
Chris@16:       : object_manager_traits<object>
Chris@16:   {
Chris@16:   };
Chris@16: }
Chris@16: 
Chris@16: // Placing this after the specialization above suppresses a CWPro8.3 bug
Chris@16: inline scope::scope(scope const& new_scope)
Chris@16:     : object(new_scope)
Chris@16:     , m_previous_scope(detail::current_scope)
Chris@16: {
Chris@16:     detail::current_scope = python::incref(new_scope.ptr());
Chris@16: }
Chris@16: 
Chris@16: }} // namespace boost::python
Chris@16: 
Chris@16: #endif // SCOPE_DWA2002724_HPP