# オブジェクトをヒープ上にメモリ確保する

PyObject *_PyObject_New(PyTypeObject *type)
  戻り値: 新しい参照。

PyVarObject *_PyObject_NewVar(PyTypeObject *type, Py_ssize_t size)
  戻り値: 新しい参照。

PyObject *PyObject_Init(PyObject *op, PyTypeObject *type)
  戻り値: 借用参照。 次に属します: Stable ABI.

  Initialize a newly allocated object op with its type and initial reference. Returns the initialized object. Other fields of the object are not affected.

PyVarObject *PyObject_InitVar(PyVarObject *op, PyTypeObject *type, Py_ssize_t size)
  戻り値: 借用参照。 次に属します: Stable ABI.

  `PyObject_Init()` の全ての処理を行い、可変サイズオブジェクトの場合には長さ情報も初期化します。

PyObject_New(TYPE, typeobj)

  Allocate a new Python object using the C structure type TYPE and the Python type object typeobj (`PyTypeObject*`). Fields not defined by the Python object header are not initialized. The caller will own the only reference to the object (i.e. its reference count will be one). The size of the memory allocation is determined from the `tp_basicsize` field of the type object.

  Note that this function is unsuitable if typeobj has `Py_TPFLAGS_HAVE_GC` set. For such objects, use `PyObject_GC_New()` instead.

PyObject_NewVar(TYPE, typeobj, size)

  Allocate a new Python object using the C structure type TYPE and the Python type object typeobj (`PyTypeObject*`). Fields not defined by the Python object header are not initialized. The allocated memory allows for the TYPE structure plus size (`Py_ssize_t`) fields of the size given by the `tp_itemsize` field of typeobj. This is useful for implementing objects like tuples, which are able to determine their size at construction time. Embedding the array of fields into the same allocation decreases the number of allocations, improving the memory management efficiency.

  Note that this function is unsuitable if typeobj has `Py_TPFLAGS_HAVE_GC` set. For such objects, use `PyObject_GC_NewVar()` instead.

void PyObject_Del(void *op)

  Releases memory allocated to an object using `PyObject_New` or `PyObject_NewVar`. This is normally called from the `tp_dealloc` handler specified in the object's type. The fields of the object should not be accessed after this call as the memory is no longer a valid Python object.

PyObject _Py_NoneStruct

  Python からは `None` に見えるオブジェクトです。この値へのアクセスは、このオブジェクトへのポインタを評価する `Py_None` マクロを使わなければなりません。

参考

モジュールオブジェクト (module object)

  拡張モジュールのアロケートと生成。