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/* InterpreterError extends Exception */
static PyTypeObject _PyExc_InterpreterError = {
    PyVarObject_HEAD_INIT(NULL, 0)
    .tp_name = "interpreters.InterpreterError",
    .tp_doc = PyDoc_STR("A cross-interpreter operation failed"),
    .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC,
    //.tp_traverse = ((PyTypeObject *)PyExc_Exception)->tp_traverse,
    //.tp_clear = ((PyTypeObject *)PyExc_Exception)->tp_clear,
    //.tp_base = (PyTypeObject *)PyExc_Exception,
PyObject *PyExc_InterpreterError = (PyObject *)&_PyExc_InterpreterError;
/* InterpreterNotFoundError extends InterpreterError */
static PyTypeObject _PyExc_InterpreterNotFoundError = {
    PyVarObject_HEAD_INIT(NULL, 0)
    .tp_name = "interpreters.InterpreterNotFoundError",
    .tp_doc = PyDoc_STR("An interpreter was not found"),
    .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC,
    //.tp_traverse = ((PyTypeObject *)PyExc_Exception)->tp_traverse,
    //.tp_clear = ((PyTypeObject *)PyExc_Exception)->tp_clear,
    .tp_base = &_PyExc_InterpreterError,
PyObject *PyExc_InterpreterNotFoundError = (PyObject *)&_PyExc_InterpreterNotFoundError;
/* NotShareableError extends ValueError */
_init_not_shareable_error_type(PyInterpreterState *interp)
    const char *name = "interpreters.NotShareableError";
    PyObject *base = PyExc_ValueError;
    PyObject *ns = NULL;
    PyObject *exctype = PyErr_NewException(name, base, ns);
    if (exctype == NULL) {
        return -1;
    _PyInterpreterState_GetXIState(interp)->PyExc_NotShareableError = exctype;
    return 0;
static void
_fini_not_shareable_error_type(PyInterpreterState *interp)
    Py_CLEAR(_PyInterpreterState_GetXIState(interp)->PyExc_NotShareableError);
static PyObject *
_get_not_shareable_error_type(PyInterpreterState *interp)
    assert(_PyInterpreterState_GetXIState(interp)->PyExc_NotShareableError != NULL);
    return _PyInterpreterState_GetXIState(interp)->PyExc_NotShareableError;
/* lifecycle */
init_exceptions(PyInterpreterState *interp)
    PyTypeObject *base = (PyTypeObject *)PyExc_Exception;
    // builtin static types
    _PyExc_InterpreterError.tp_base = base;
    _PyExc_InterpreterError.tp_traverse = base->tp_traverse;
    _PyExc_InterpreterError.tp_clear = base->tp_clear;
    if (_PyStaticType_InitBuiltin(interp, &_PyExc_InterpreterError) < 0) {
        return -1;
    _PyExc_InterpreterNotFoundError.tp_traverse = base->tp_traverse;
    _PyExc_InterpreterNotFoundError.tp_clear = base->tp_clear;
    if (_PyStaticType_InitBuiltin(interp, &_PyExc_InterpreterNotFoundError) < 0) {
        return -1;
    // heap types
    // We would  call _init_not_shareable_error_type() here too,
    // but that leads to ref leaks
    return 0;
static void
fini_exceptions(PyInterpreterState *interp)
    // Likewise with _fini_not_shareable_error_type().
    _PyStaticType_FiniBuiltin(interp, &_PyExc_InterpreterNotFoundError);
    _PyStaticType_FiniBuiltin(interp, &_PyExc_InterpreterError);

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crossinterp_exceptions.h

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crossinterp_exceptions.h

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