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The C and C++ Include Header Files

cat -n /usr/include/python3.12/internal/pycore_object_state.h

     1	#ifndef Py_INTERNAL_OBJECT_STATE_H
     2	#define Py_INTERNAL_OBJECT_STATE_H
     3	#ifdef __cplusplus
     4	extern "C" {
     5	#endif
     6	
     7	#ifndef Py_BUILD_CORE
     8	#  error "this header requires Py_BUILD_CORE define"
     9	#endif
    10	
    11	struct _py_object_runtime_state {
    12	#ifdef Py_REF_DEBUG
    13	    Py_ssize_t interpreter_leaks;
    14	#endif
    15	    int _not_used;
    16	};
    17	
    18	struct _py_object_state {
    19	#ifdef Py_REF_DEBUG
    20	    Py_ssize_t reftotal;
    21	#endif
    22	#ifdef Py_TRACE_REFS
    23	    /* Head of circular doubly-linked list of all objects.  These are linked
    24	     * together via the _ob_prev and _ob_next members of a PyObject, which
    25	     * exist only in a Py_TRACE_REFS build.
    26	     */
    27	    PyObject *refchain;
    28	    /* In most cases, refchain points to _refchain_obj.
    29	     * In sub-interpreters that share objmalloc state with the main interp,
    30	     * refchain points to the main interpreter's _refchain_obj, and their own
    31	     * _refchain_obj is unused.
    32	     */
    33	    PyObject _refchain_obj;
    34	#endif
    35	    int _not_used;
    36	};
    37	
    38	
    39	#ifdef __cplusplus
    40	}
    41	#endif
    42	#endif /* !Py_INTERNAL_OBJECT_STATE_H */