Commit dffeeebd authored by JINMEI Tatuya's avatar JINMEI Tatuya
Browse files

[trac983] added the default constructor and reset() to PyObjectContainer,

which will be used for the remaining work in trac983.
parent 673a619c
......@@ -94,6 +94,22 @@ public:
/// the reference to be decreased, the original bare pointer should be
/// extracted using the \c release() method.
/// In some other cases, it would be convenient if it's possible to create
/// an "empty" container and reset it with a Python object later.
/// For example, we may want to create a temporary Python object in the
/// middle of a function and make sure that it's valid within the rest of
/// the function scope, while we want to make sure its reference is released
/// when the function returns (either normally or as a result of exception).
/// To allow this scenario, this class defines the default constructor
/// and the \c reset() method. The default constructor allows the class
/// object with an "empty" (NULL) Python object, while \c reset() allows
/// the stored object to be replaced with a new one. If there's a valid
/// object was already set, \c reset() releases its reference.
/// In general, it's safer to construct the container object with a valid
/// Python object pointer. The use of the default constructor and
/// \c reset() should therefore be restricted to cases where it's
/// absolutely necessary.
/// There are two convenience methods for commonly used operations:
/// \c installAsClassVariable() to add the PyObject as a class variable
/// and \c installToModule to add the PyObject to a specified python module.
......@@ -166,16 +182,27 @@ public:
/// exception in a python biding written in C/C++. See the code comment
/// of the method for more details.
struct PyObjectContainer {
PyObjectContainer() : obj_(NULL) {}
PyObjectContainer(PyObject* obj) : obj_(obj) {
if (obj_ == NULL) {
isc_throw(PyCPPWrapperException, "Unexpected NULL PyObject, "
"probably due to short memory");
virtual ~PyObjectContainer() {
~PyObjectContainer() {
if (obj_ != NULL) {
void reset(PyObject* obj) {
if (obj == NULL) {
isc_throw(PyCPPWrapperException, "Unexpected NULL PyObject, "
"probably due to short memory");
if (obj_ != NULL) {
obj_ = obj;
PyObject* get() {
return (obj_);
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