In which file is the PyObject struct defined?

MercMayhem · December 6, 2024, 6:00am

I can’t find where PyObject has been defined.

blhsing · December 6, 2024, 6:16am

Here it is:

python/cpython/blob/d57f8a9f76e75384ec997686c2a826b1dc3c69c4/Include/pytypedefs.h#L18


      
          #ifdef __cplusplus
          extern "C" {
          #endif
          
          typedef struct PyModuleDef PyModuleDef;
          typedef struct PyModuleDef_Slot PyModuleDef_Slot;
          typedef struct PyMethodDef PyMethodDef;
          typedef struct PyGetSetDef PyGetSetDef;
          typedef struct PyMemberDef PyMemberDef;
          
          typedef struct _object PyObject;
          typedef struct _longobject PyLongObject;
          typedef struct _typeobject PyTypeObject;
          typedef struct PyCodeObject PyCodeObject;
          typedef struct _frame PyFrameObject;
          
          typedef struct _ts PyThreadState;
          typedef struct _is PyInterpreterState;
          
          #ifdef __cplusplus
          }

And struct _object is defined here:

github.com

python/cpython/blob/d57f8a9f76e75384ec997686c2a826b1dc3c69c4/Include/object.h#L110


      
          */
          #define PyObject_VAR_HEAD      PyVarObject ob_base;
          #define Py_INVALID_SIZE (Py_ssize_t)-1
          
          /* 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*.
          */
          #ifndef Py_GIL_DISABLED
          struct _object {
          #if (defined(__GNUC__) || defined(__clang__)) \
                 && !(defined __STDC_VERSION__ && __STDC_VERSION__ >= 201112L)
             // On C99 and older, anonymous union is a GCC and clang extension
             __extension__
          #endif
          #ifdef _MSC_VER
             // Ignore MSC warning C4201: "nonstandard extension used:
             // nameless struct/union"
             __pragma(warning(push))
             __pragma(warning(disable: 4201))