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add get_python_pointer()

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This commit is contained in:
David Rose 2007-06-22 22:36:32 +00:00
parent 06a36aff63
commit 7349221f42
2 changed files with 82 additions and 0 deletions
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71
panda/src/express/memoryUsagePointers.cxx
View File

@ -24,6 +24,18 @@
#include "referenceCount.h"
#include "typedReferenceCount.h"
#ifdef HAVE_PYTHON
// Pick up a few declarations so we can create Python wrappers in
// get_python_pointer(), below.
#include "py_panda.h"
extern EXPCL_PANDAEXPRESS Dtool_PyTypedObject Dtool_TypedObject;
extern EXPCL_PANDAEXPRESS Dtool_PyTypedObject Dtool_TypedReferenceCount;
extern EXPCL_PANDAEXPRESS Dtool_PyTypedObject Dtool_ReferenceCount;
#endif // HAVE_PYTHON
////////////////////////////////////////////////////////////////////
// Function: MemoryUsagePointers::Constructor
// Access: Published
@ -141,6 +153,65 @@ get_age(int n) const {
return _entries[n]._age;
}
#ifdef HAVE_PYTHON
////////////////////////////////////////////////////////////////////
// Function: MemoryUsagePointers::get_python_pointer
// Access: Published
// Description: Returns the nth object, represented as a Python
// object of the appropriate type. Reference counting
// will be properly set on the Python object.
//
// get_typed_pointer() is almost as good as this, but
// (a) it does not set the reference count, and (b) it
// does not work for objects that do not inherit from
// TypedObject. This will work for any object whose
// type is known, which has a Python representation.
////////////////////////////////////////////////////////////////////
PyObject *MemoryUsagePointers::
get_python_pointer(int n) const {
nassertr(n >= 0 && n < get_num_pointers(), NULL);
TypedObject *typed_ptr = _entries[n]._typed_ptr;
ReferenceCount *ref_ptr = _entries[n]._ref_ptr;
bool memory_rules = false;
if (ref_ptr != (ReferenceCount *)NULL) {
memory_rules = true;
ref_ptr->ref();
}
if (typed_ptr != (TypedObject *)NULL) {
return DTool_CreatePyInstanceTyped(typed_ptr, Dtool_TypedObject,
memory_rules, false,
typed_ptr->get_type_index());
}
if (ref_ptr == (ReferenceCount *)NULL) {
return Py_BuildValue("");
}
TypeHandle type = _entries[n]._type;
if (type != TypeHandle::none()) {
// Use TypedReferenceCount if we have it.
if (type.is_derived_from(TypedReferenceCount::get_class_type())) {
TypedReferenceCount *typed_ref_ptr = (TypedReferenceCount *)ref_ptr;
return DTool_CreatePyInstanceTyped(typed_ref_ptr, Dtool_TypedReferenceCount,
memory_rules, false,
type.get_index());
}
// Otherwise, trust that there is a downcast path to the actual type.
return DTool_CreatePyInstanceTyped(ref_ptr, Dtool_ReferenceCount,
memory_rules, false,
type.get_index());
}
// If worse comes to worst, just return a ReferenceCount wrapper.
return DTool_CreatePyInstance(ref_ptr, Dtool_ReferenceCount,
memory_rules, false);
}
#endif
////////////////////////////////////////////////////////////////////
// Function: MemoryUsagePointers::clear
// Access: Published

11
panda/src/express/memoryUsagePointers.h
View File

@ -28,6 +28,13 @@
#include "referenceCount.h"
#include "pvector.h"
#ifdef HAVE_PYTHON
#undef _POSIX_C_SOURCE
#include <Python.h>
#endif // HAVE_PYTHON
////////////////////////////////////////////////////////////////////
// Class : MemoryUsagePointers
// Description : This is a list of pointers returned by a MemoryUsage
@ -61,6 +68,10 @@ PUBLISHED:
string get_type_name(int n) const;
double get_age(int n) const;
#ifdef HAVE_PYTHON
PyObject *get_python_pointer(int n) const;
#endif
void clear();
void output(ostream &out) const;