浅谈 Python 的对象实现（PyObject）

Sat, 30 Mar 2024 12:00:00 +0800

PyObject

Everything is object, except keywords

所有的都是对象，除了关键字

Include/object.h

/* PyObject_HEAD 是所有 OBJECT 的初始化段 */
#define PyObject_HEAD PyObject ob_base;
typedef struct _object PyObject;

struct _object {
    Py_ssize_t ob_refcnt;
    PyTypeObject *ob_type;
};

/* Py_GIL_DISABLED （无 GIL 锁的版本），添加了额外的 mutex */
struct _object {
    uintptr_t ob_tid;
    uint16_t _padding;
    struct _PyMutex ob_mutex;   // per-object lock
    uint8_t ob_gc_bits;         // gc-related state
    uint32_t ob_ref_local;      // local reference count
    Py_ssize_t ob_ref_shared;   // shared (atomic) reference count
    PyTypeObject *ob_type;
};

PyObject on DefeatMan的博客

浅谈 Python 的对象实现（PyObject）

PyObject