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#ifndef Py_CORE_CROSSINTERP_DATA_REGISTRY_H
# error "this header must not be included directly"
#endif
// For now we use a global registry of shareable classes. An
// alternative would be to add a tp_* slot for a class's
// xidatafunc. It would be simpler and more efficient.
struct _xid_regitem;
typedef struct _xid_regitem {
struct _xid_regitem *prev;
struct _xid_regitem *next;
/* This can be a dangling pointer, but only if weakref is set. */
PyTypeObject *cls;
/* This is NULL for builtin types. */
PyObject *weakref;
size_t refcount;
_PyXIData_getdata_t getdata;
} _PyXIData_regitem_t;
typedef struct {
int global; /* builtin types or heap types */
int initialized;
PyMutex mutex;
_PyXIData_regitem_t *head;
} _PyXIData_registry_t;
PyAPI_FUNC(int) _PyXIData_RegisterClass(
PyThreadState *,
PyTypeObject *,
_PyXIData_getdata_t);
PyAPI_FUNC(int) _PyXIData_UnregisterClass(
PyThreadState *,
PyTypeObject *);
struct _xid_lookup_state {
// XXX Remove this field once we have a tp_* slot.
_PyXIData_registry_t registry;
};
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