Python源码阅读（二、对象）

 

一、参考

Python源码剖析

二、正文

// 路径： Includeobject.h
/* Nothing is actually declared to be a PyObject, but every pointer to
 * a Python object can be cast to a PyObject*.  This is inheritance built
 * by hand.  Similarly every pointer to a variable-size Python object can,
 * in addition, be cast to PyVarObject*.
 */
typedef struct _object {
    PyObject_HEAD
} PyObject;

// 路径：Includeobject.h
/* PyObject_HEAD defines the initial segment of every PyObject. */
#define PyObject_HEAD            
    _PyObject_HEAD_EXTRA        
    Py_ssize_t ob_refcnt;         // 引用计数，用于内存管理
    struct _typeobject *ob_type;   // 类型信息