73 lines
2.7 KiB
C++
73 lines
2.7 KiB
C++
// Filename: memoryUsagePointers_ext.cxx
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// Created by: rdb (10Dec13)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) Carnegie Mellon University. All rights reserved.
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//
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// All use of this software is subject to the terms of the revised BSD
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// license. You should have received a copy of this license along
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// with this source code in a file named "LICENSE."
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//
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////////////////////////////////////////////////////////////////////
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#include "memoryUsagePointers_ext.h"
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#if defined(HAVE_PYTHON) && defined(DO_MEMORY_USAGE)
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#ifndef CPPPARSER
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extern EXPCL_PANDAEXPRESS Dtool_PyTypedObject Dtool_TypedObject;
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extern EXPCL_PANDAEXPRESS Dtool_PyTypedObject Dtool_TypedReferenceCount;
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extern EXPCL_PANDAEXPRESS Dtool_PyTypedObject Dtool_ReferenceCount;
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#endif // CPPPARSER
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////////////////////////////////////////////////////////////////////
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// Function: MemoryUsagePointers::get_python_pointer
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// Access: Published
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// Description: Returns the nth object, represented as a Python
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// object of the appropriate type. Reference counting
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// will be properly set on the Python object.
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//
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// get_typed_pointer() is almost as good as this, but
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// (a) it does not set the reference count, and (b) it
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// does not work for objects that do not inherit from
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// TypedObject. This will work for any object whose
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// type is known, which has a Python representation.
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////////////////////////////////////////////////////////////////////
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PyObject *Extension<MemoryUsagePointers>::
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get_python_pointer(int n) const {
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TypedObject *typed_ptr = _this->get_typed_pointer(n);
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ReferenceCount *ref_ptr = _this->get_pointer(n);
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bool memory_rules = false;
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if (ref_ptr != (ReferenceCount *)NULL) {
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memory_rules = true;
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ref_ptr->ref();
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}
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if (typed_ptr != (TypedObject *)NULL) {
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return DTool_CreatePyInstanceTyped(typed_ptr, Dtool_TypedObject,
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memory_rules, false,
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typed_ptr->get_type_index());
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}
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if (ref_ptr == (ReferenceCount *)NULL) {
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return Py_BuildValue("");
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}
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TypeHandle type = _this->get_type(n);
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if (type != TypeHandle::none()) {
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// Trust that there is a downcast path to the actual type.
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return DTool_CreatePyInstanceTyped(ref_ptr, Dtool_ReferenceCount,
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memory_rules, false,
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type.get_index());
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}
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// If worse comes to worst, just return a ReferenceCount wrapper.
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return DTool_CreatePyInstance(ref_ptr, Dtool_ReferenceCount,
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memory_rules, false);
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}
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#endif // HAVE_PYTHON && DO_MEMORY_USAGE
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