comparison DEPENDENCIES/generic/include/boost/python/instance_holder.hpp @ 16:2665513ce2d3

Add boost headers

+// Copyright David Abrahams 2002.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+#ifndef INSTANCE_HOLDER_DWA2002517_HPP
+# define INSTANCE_HOLDER_DWA2002517_HPP
+
+# include <boost/python/detail/prefix.hpp>
+
+# include <boost/noncopyable.hpp>
+# include <boost/python/type_id.hpp>
+# include <cstddef>
+
+namespace boost { namespace python { 
+
+// Base class for all holders
+struct BOOST_PYTHON_DECL instance_holder : private noncopyable
+{
+ public:
+    instance_holder();
+    virtual ~instance_holder();
+    
+    // return the next holder in a chain
+    instance_holder* next() const;
+
+    // When the derived holder actually holds by [smart] pointer and
+    // null_ptr_only is set, only report that the type is held when
+    // the pointer is null.  This is needed for proper shared_ptr
+    // support, to prevent holding shared_ptrs from being found when
+    // converting from python so that we can use the conversion method
+    // that always holds the Python object.
+    virtual void* holds(type_info, bool null_ptr_only) = 0;
+
+    void install(PyObject* inst) throw();
+
+    // These functions should probably be located elsewhere.
+    
+    // Allocate storage for an object of the given size at the given
+    // offset in the Python instance<> object if bytes are available
+    // there. Otherwise allocate size bytes of heap memory.
+    static void* allocate(PyObject*, std::size_t offset, std::size_t size);
+
+    // Deallocate storage from the heap if it was not carved out of
+    // the given Python object by allocate(), above.
+    static void deallocate(PyObject*, void* storage) throw();
+ private:
+    instance_holder* m_next;
+};
+
+// This macro is needed for implementation of derived holders
+# define BOOST_PYTHON_UNFORWARD(N,ignored) (typename unforward<A##N>::type)(a##N)
+
+//
+// implementation
+//
+inline instance_holder* instance_holder::next() const
+{
+    return m_next;
+}
+
+}} // namespace boost::python
+
+#endif // INSTANCE_HOLDER_DWA2002517_HPP