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v3.15.0a3
Objects/genobject.c
2 435 строк
80 KB
Mikhail Efimov
gh-140373: Correctly emit `PY_UNWIND` event when generator is closed (GH-140767)
31 окт 2025, 13:09
Не верифицирован
31 окт 2025, 13:09
d17f28f
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/* Generator object implementation */ #define _PY_INTERPRETER #include "Python.h" #include "pycore_call.h" // _PyObject_CallNoArgs() #include "pycore_ceval.h" // _PyEval_EvalFrame() #include "pycore_frame.h" // _PyInterpreterFrame #include "pycore_freelist.h" // _Py_FREELIST_FREE() #include "pycore_gc.h" // _PyGC_CLEAR_FINALIZED() #include "pycore_genobject.h" // _PyGen_SetStopIterationValue() #include "pycore_interpframe.h" // _PyFrame_GetCode() #include "pycore_modsupport.h" // _PyArg_CheckPositional() #include "pycore_object.h" // _PyObject_GC_UNTRACK() #include "pycore_opcode_utils.h" // RESUME_AFTER_YIELD_FROM #include "pycore_pyatomic_ft_wrappers.h" // FT_ATOMIC_LOAD_UINT8_RELAXED() #include "pycore_pyerrors.h" // _PyErr_ClearExcState() #include "pycore_pystate.h" // _PyThreadState_GET() #include "pycore_warnings.h" // _PyErr_WarnUnawaitedCoroutine() #include "pycore_weakref.h" // FT_CLEAR_WEAKREFS() #include "opcode_ids.h" // RESUME, etc // Forward declarations static PyObject* gen_close(PyObject *, PyObject *); static PyObject* async_gen_asend_new(PyAsyncGenObject *, PyObject *); static PyObject* async_gen_athrow_new(PyAsyncGenObject *, PyObject *); #define _PyGen_CAST(op) \ _Py_CAST(PyGenObject*, (op)) #define _PyCoroObject_CAST(op) \ (assert(PyCoro_CheckExact(op)), \ _Py_CAST(PyCoroObject*, (op))) #define _PyAsyncGenObject_CAST(op) \ _Py_CAST(PyAsyncGenObject*, (op)) static const char *NON_INIT_CORO_MSG = "can't send non-None value to a " "just-started coroutine"; static const char *ASYNC_GEN_IGNORED_EXIT_MSG = "async generator ignored GeneratorExit"; /* Returns a borrowed reference */ static inline PyCodeObject * _PyGen_GetCode(PyGenObject *gen) { return _PyFrame_GetCode(&gen->gi_iframe); } PyCodeObject * PyGen_GetCode(PyGenObject *gen) { assert(PyGen_Check(gen)); PyCodeObject *res = _PyGen_GetCode(gen); Py_INCREF(res); return res; } static int gen_traverse(PyObject *self, visitproc visit, void *arg) { PyGenObject *gen = _PyGen_CAST(self); Py_VISIT(gen->gi_name); Py_VISIT(gen->gi_qualname); if (gen->gi_frame_state != FRAME_CLEARED) { _PyInterpreterFrame *frame = &gen->gi_iframe; assert(frame->frame_obj == NULL || frame->frame_obj->f_frame->owner == FRAME_OWNED_BY_GENERATOR); int err = _PyFrame_Traverse(frame, visit, arg); if (err) { return err; } } else { // We still need to visit the code object when the frame is cleared to // ensure that it's kept alive if the reference is deferred. _Py_VISIT_STACKREF(gen->gi_iframe.f_executable); } /* No need to visit cr_origin, because it's just tuples/str/int, so can't participate in a reference cycle. */ Py_VISIT(gen->gi_exc_state.exc_value); return 0; } void _PyGen_Finalize(PyObject *self) { PyGenObject *gen = (PyGenObject *)self; if (FRAME_STATE_FINISHED(gen->gi_frame_state)) { /* Generator isn't paused, so no need to close */ return; } if (PyAsyncGen_CheckExact(self)) { PyAsyncGenObject *agen = (PyAsyncGenObject*)self; PyObject *finalizer = agen->ag_origin_or_finalizer; if (finalizer && !agen->ag_closed) { /* Save the current exception, if any. */ PyObject *exc = PyErr_GetRaisedException(); PyObject *res = PyObject_CallOneArg(finalizer, self); if (res == NULL) { PyErr_FormatUnraisable("Exception ignored while " "finalizing generator %R", self); } else { Py_DECREF(res); } /* Restore the saved exception. */ PyErr_SetRaisedException(exc); return; } } /* Save the current exception, if any. */ PyObject *exc = PyErr_GetRaisedException(); /* If `gen` is a coroutine, and if it was never awaited on, issue a RuntimeWarning. */ assert(_PyGen_GetCode(gen) != NULL); if (_PyGen_GetCode(gen)->co_flags & CO_COROUTINE && gen->gi_frame_state == FRAME_CREATED) { _PyErr_WarnUnawaitedCoroutine((PyObject *)gen); } else { PyObject *res = gen_close((PyObject*)gen, NULL); if (res == NULL) { if (PyErr_Occurred()) { PyErr_FormatUnraisable("Exception ignored while " "closing generator %R", self); } } else { Py_DECREF(res); } } /* Restore the saved exception. */ PyErr_SetRaisedException(exc); } static void gen_clear_frame(PyGenObject *gen) { if (gen->gi_frame_state == FRAME_CLEARED) return; gen->gi_frame_state = FRAME_CLEARED; _PyInterpreterFrame *frame = &gen->gi_iframe; frame->previous = NULL; _PyFrame_ClearExceptCode(frame); _PyErr_ClearExcState(&gen->gi_exc_state); } static void gen_dealloc(PyObject *self) { PyGenObject *gen = _PyGen_CAST(self); _PyObject_GC_UNTRACK(gen); FT_CLEAR_WEAKREFS(self, gen->gi_weakreflist); _PyObject_GC_TRACK(self); if (PyObject_CallFinalizerFromDealloc(self)) return; /* resurrected. :( */ _PyObject_GC_UNTRACK(self); if (PyAsyncGen_CheckExact(gen)) { /* We have to handle this case for asynchronous generators right here, because this code has to be between UNTRACK and GC_Del. */ Py_CLEAR(((PyAsyncGenObject*)gen)->ag_origin_or_finalizer); } if (PyCoro_CheckExact(gen)) { Py_CLEAR(((PyCoroObject *)gen)->cr_origin_or_finalizer); } gen_clear_frame(gen); assert(gen->gi_exc_state.exc_value == NULL); PyStackRef_CLEAR(gen->gi_iframe.f_executable); Py_CLEAR(gen->gi_name); Py_CLEAR(gen->gi_qualname); PyObject_GC_Del(gen); } static PySendResult gen_send_ex2(PyGenObject *gen, PyObject *arg, PyObject **presult, int exc, int closing) { PyThreadState *tstate = _PyThreadState_GET(); _PyInterpreterFrame *frame = &gen->gi_iframe; *presult = NULL; if (gen->gi_frame_state == FRAME_CREATED && arg && arg != Py_None) { const char *msg = "can't send non-None value to a " "just-started generator"; if (PyCoro_CheckExact(gen)) { msg = NON_INIT_CORO_MSG; } else if (PyAsyncGen_CheckExact(gen)) { msg = "can't send non-None value to a " "just-started async generator"; } PyErr_SetString(PyExc_TypeError, msg); return PYGEN_ERROR; } if (gen->gi_frame_state == FRAME_EXECUTING) { const char *msg = "generator already executing"; if (PyCoro_CheckExact(gen)) { msg = "coroutine already executing"; } else if (PyAsyncGen_CheckExact(gen)) { msg = "async generator already executing"; } PyErr_SetString(PyExc_ValueError, msg); return PYGEN_ERROR; } if (FRAME_STATE_FINISHED(gen->gi_frame_state)) { if (PyCoro_CheckExact(gen) && !closing) { /* `gen` is an exhausted coroutine: raise an error, except when called from gen_close(), which should always be a silent method. */ PyErr_SetString( PyExc_RuntimeError, "cannot reuse already awaited coroutine"); } else if (arg && !exc) { /* `gen` is an exhausted generator: only return value if called from send(). */ *presult = Py_NewRef(Py_None); return PYGEN_RETURN; } return PYGEN_ERROR; } assert((gen->gi_frame_state == FRAME_CREATED) || FRAME_STATE_SUSPENDED(gen->gi_frame_state)); /* Push arg onto the frame's value stack */ PyObject *arg_obj = arg ? arg : Py_None; _PyFrame_StackPush(frame, PyStackRef_FromPyObjectNew(arg_obj)); _PyErr_StackItem *prev_exc_info = tstate->exc_info; gen->gi_exc_state.previous_item = prev_exc_info; tstate->exc_info = &gen->gi_exc_state; if (exc) { assert(_PyErr_Occurred(tstate)); _PyErr_ChainStackItem(); } gen->gi_frame_state = FRAME_EXECUTING; EVAL_CALL_STAT_INC(EVAL_CALL_GENERATOR); PyObject *result = _PyEval_EvalFrame(tstate, frame, exc); assert(tstate->exc_info == prev_exc_info); assert(gen->gi_exc_state.previous_item == NULL); assert(gen->gi_frame_state != FRAME_EXECUTING); assert(frame->previous == NULL); /* If the generator just returned (as opposed to yielding), signal * that the generator is exhausted. */ if (result) { if (FRAME_STATE_SUSPENDED(gen->gi_frame_state)) { *presult = result; return PYGEN_NEXT; } assert(result == Py_None || !PyAsyncGen_CheckExact(gen)); if (result == Py_None && !PyAsyncGen_CheckExact(gen) && !arg) { /* Return NULL if called by gen_iternext() */ Py_CLEAR(result); } } else { assert(!PyErr_ExceptionMatches(PyExc_StopIteration)); assert(!PyAsyncGen_CheckExact(gen) || !PyErr_ExceptionMatches(PyExc_StopAsyncIteration)); } assert(gen->gi_exc_state.exc_value == NULL); assert(gen->gi_frame_state == FRAME_CLEARED); *presult = result; return result ? PYGEN_RETURN : PYGEN_ERROR; } static PySendResult PyGen_am_send(PyObject *self, PyObject *arg, PyObject **result) { PyGenObject *gen = _PyGen_CAST(self); return gen_send_ex2(gen, arg, result, 0, 0); } static PyObject * gen_send_ex(PyGenObject *gen, PyObject *arg, int exc, int closing) { PyObject *result; if (gen_send_ex2(gen, arg, &result, exc, closing) == PYGEN_RETURN) { if (PyAsyncGen_CheckExact(gen)) { assert(result == Py_None); PyErr_SetNone(PyExc_StopAsyncIteration); } else if (result == Py_None) { PyErr_SetNone(PyExc_StopIteration); } else { _PyGen_SetStopIterationValue(result); } Py_CLEAR(result); } return result; } PyDoc_STRVAR(send_doc, "send(value) -> send 'value' into generator,\n\ return next yielded value or raise StopIteration."); static PyObject * gen_send(PyObject *gen, PyObject *arg) { return gen_send_ex((PyGenObject*)gen, arg, 0, 0); } PyDoc_STRVAR(close_doc, "close() -> raise GeneratorExit inside generator."); /* * This helper function is used by gen_close and gen_throw to * close a subiterator being delegated to by yield-from. */ static int gen_close_iter(PyObject *yf) { PyObject *retval = NULL; if (PyGen_CheckExact(yf) || PyCoro_CheckExact(yf)) { retval = gen_close((PyObject *)yf, NULL); if (retval == NULL) return -1; } else { PyObject *meth; if (PyObject_GetOptionalAttr(yf, &_Py_ID(close), &meth) < 0) { PyErr_FormatUnraisable("Exception ignored while " "closing generator %R", yf); } if (meth) { retval = _PyObject_CallNoArgs(meth); Py_DECREF(meth); if (retval == NULL) return -1; } } Py_XDECREF(retval); return 0; } static inline bool is_resume(_Py_CODEUNIT *instr) { uint8_t code = FT_ATOMIC_LOAD_UINT8_RELAXED(instr->op.code); return ( code == RESUME || code == RESUME_CHECK || code == INSTRUMENTED_RESUME ); } PyObject * _PyGen_yf(PyGenObject *gen) { if (gen->gi_frame_state == FRAME_SUSPENDED_YIELD_FROM) { _PyInterpreterFrame *frame = &gen->gi_iframe; // GH-122390: These asserts are wrong in the presence of ENTER_EXECUTOR! // assert(is_resume(frame->instr_ptr)); // assert((frame->instr_ptr->op.arg & RESUME_OPARG_LOCATION_MASK) >= RESUME_AFTER_YIELD_FROM); return PyStackRef_AsPyObjectNew(_PyFrame_StackPeek(frame)); } return NULL; } static PyObject * gen_close(PyObject *self, PyObject *args) { PyGenObject *gen = _PyGen_CAST(self); if (gen->gi_frame_state == FRAME_CREATED) { gen->gi_frame_state = FRAME_COMPLETED; Py_RETURN_NONE; } if (FRAME_STATE_FINISHED(gen->gi_frame_state)) { Py_RETURN_NONE; } PyObject *yf = _PyGen_yf(gen); int err = 0; if (yf) { PyFrameState state = gen->gi_frame_state; gen->gi_frame_state = FRAME_EXECUTING; err = gen_close_iter(yf); gen->gi_frame_state = state; Py_DECREF(yf); } _PyInterpreterFrame *frame = &gen->gi_iframe; if (is_resume(frame->instr_ptr)) { bool no_unwind_tools = _PyEval_NoToolsForUnwind(_PyThreadState_GET()); /* We can safely ignore the outermost try block * as it is automatically generated to handle * StopIteration. */ int oparg = frame->instr_ptr->op.arg; if (oparg & RESUME_OPARG_DEPTH1_MASK && no_unwind_tools) { // RESUME after YIELD_VALUE and exception depth is 1 assert((oparg & RESUME_OPARG_LOCATION_MASK) != RESUME_AT_FUNC_START); gen->gi_frame_state = FRAME_COMPLETED; gen_clear_frame(gen); Py_RETURN_NONE; } } if (err == 0) { PyErr_SetNone(PyExc_GeneratorExit); } PyObject *retval = gen_send_ex(gen, Py_None, 1, 1); if (retval) { const char *msg = "generator ignored GeneratorExit"; if (PyCoro_CheckExact(gen)) { msg = "coroutine ignored GeneratorExit"; } else if (PyAsyncGen_CheckExact(gen)) { msg = ASYNC_GEN_IGNORED_EXIT_MSG; } Py_DECREF(retval); PyErr_SetString(PyExc_RuntimeError, msg); return NULL; } assert(PyErr_Occurred()); if (PyErr_ExceptionMatches(PyExc_GeneratorExit)) { PyErr_Clear(); /* ignore this error */ Py_RETURN_NONE; } /* if the generator returned a value while closing, StopIteration was * raised in gen_send_ex() above; retrieve and return the value here */ if (_PyGen_FetchStopIterationValue(&retval) == 0) { return retval; } return NULL; } PyDoc_STRVAR(throw_doc, "throw(value)\n\ throw(type[,value[,tb]])\n\ \n\ Raise exception in generator, return next yielded value or raise\n\ StopIteration.\n\ the (type, val, tb) signature is deprecated, \n\ and may be removed in a future version of Python."); static PyObject * _gen_throw(PyGenObject *gen, int close_on_genexit, PyObject *typ, PyObject *val, PyObject *tb) { PyObject *yf = _PyGen_yf(gen); if (yf) { _PyInterpreterFrame *frame = &gen->gi_iframe; PyObject *ret; int err; if (PyErr_GivenExceptionMatches(typ, PyExc_GeneratorExit) && close_on_genexit ) { /* Asynchronous generators *should not* be closed right away. We have to allow some awaits to work it through, hence the `close_on_genexit` parameter here. */ PyFrameState state = gen->gi_frame_state; gen->gi_frame_state = FRAME_EXECUTING; err = gen_close_iter(yf); gen->gi_frame_state = state; Py_DECREF(yf); if (err < 0) return gen_send_ex(gen, Py_None, 1, 0); goto throw_here; } PyThreadState *tstate = _PyThreadState_GET(); assert(tstate != NULL); if (PyGen_CheckExact(yf) || PyCoro_CheckExact(yf)) { /* `yf` is a generator or a coroutine. */ /* Link frame into the stack to enable complete backtraces. */ /* XXX We should probably be updating the current frame somewhere in ceval.c. */ _PyInterpreterFrame *prev = tstate->current_frame; frame->previous = prev; tstate->current_frame = frame; /* Close the generator that we are currently iterating with 'yield from' or awaiting on with 'await'. */ PyFrameState state = gen->gi_frame_state; gen->gi_frame_state = FRAME_EXECUTING; ret = _gen_throw((PyGenObject *)yf, close_on_genexit, typ, val, tb); gen->gi_frame_state = state; tstate->current_frame = prev; frame->previous = NULL; } else { /* `yf` is an iterator or a coroutine-like object. */ PyObject *meth; if (PyObject_GetOptionalAttr(yf, &_Py_ID(throw), &meth) < 0) { Py_DECREF(yf); return NULL; } if (meth == NULL) { Py_DECREF(yf); goto throw_here; } _PyInterpreterFrame *prev = tstate->current_frame; frame->previous = prev; tstate->current_frame = frame; PyFrameState state = gen->gi_frame_state; gen->gi_frame_state = FRAME_EXECUTING; ret = PyObject_CallFunctionObjArgs(meth, typ, val, tb, NULL); gen->gi_frame_state = state; tstate->current_frame = prev; frame->previous = NULL; Py_DECREF(meth); } Py_DECREF(yf); if (!ret) { ret = gen_send_ex(gen, Py_None, 1, 0); } return ret; } throw_here: /* First, check the traceback argument, replacing None with NULL. */ if (tb == Py_None) { tb = NULL; } else if (tb != NULL && !PyTraceBack_Check(tb)) { PyErr_SetString(PyExc_TypeError, "throw() third argument must be a traceback object"); return NULL; } Py_INCREF(typ); Py_XINCREF(val); Py_XINCREF(tb); if (PyExceptionClass_Check(typ)) PyErr_NormalizeException(&typ, &val, &tb); else if (PyExceptionInstance_Check(typ)) { /* Raising an instance. The value should be a dummy. */ if (val && val != Py_None) { PyErr_SetString(PyExc_TypeError, "instance exception may not have a separate value"); goto failed_throw; } else { /* Normalize to raise <class>, <instance> */ Py_XSETREF(val, typ); typ = Py_NewRef(PyExceptionInstance_Class(typ)); if (tb == NULL) /* Returns NULL if there's no traceback */ tb = PyException_GetTraceback(val); } } else { /* Not something you can raise. throw() fails. */ PyErr_Format(PyExc_TypeError, "exceptions must be classes or instances " "deriving from BaseException, not %s", Py_TYPE(typ)->tp_name); goto failed_throw; } PyErr_Restore(typ, val, tb); return gen_send_ex(gen, Py_None, 1, 0); failed_throw: /* Didn't use our arguments, so restore their original refcounts */ Py_DECREF(typ); Py_XDECREF(val); Py_XDECREF(tb); return NULL; } static PyObject * gen_throw(PyObject *op, PyObject *const *args, Py_ssize_t nargs) { PyGenObject *gen = _PyGen_CAST(op); PyObject *typ; PyObject *tb = NULL; PyObject *val = NULL; if (!_PyArg_CheckPositional("throw", nargs, 1, 3)) { return NULL; } if (nargs > 1) { if (PyErr_WarnEx(PyExc_DeprecationWarning, "the (type, exc, tb) signature of throw() is deprecated, " "use the single-arg signature instead.", 1) < 0) { return NULL; } } typ = args[0]; if (nargs == 3) { val = args[1]; tb = args[2]; } else if (nargs == 2) { val = args[1]; } return _gen_throw(gen, 1, typ, val, tb); } static PyObject * gen_iternext(PyObject *self) { assert(PyGen_CheckExact(self) || PyCoro_CheckExact(self)); PyGenObject *gen = _PyGen_CAST(self); PyObject *result; if (gen_send_ex2(gen, NULL, &result, 0, 0) == PYGEN_RETURN) { if (result != Py_None) { _PyGen_SetStopIterationValue(result); } Py_CLEAR(result); } return result; } /* * Set StopIteration with specified value. Value can be arbitrary object * or NULL. * * Returns 0 if StopIteration is set and -1 if any other exception is set. */ int _PyGen_SetStopIterationValue(PyObject *value) { assert(!PyErr_Occurred()); // Construct an exception instance manually with PyObject_CallOneArg() // but use PyErr_SetRaisedException() instead of PyErr_SetObject() as // PyErr_SetObject(exc_type, value) has a fast path when 'value' // is a tuple, where the value of the StopIteration exception would be // set to 'value[0]' instead of 'value'. PyObject *exc = value == NULL ? PyObject_CallNoArgs(PyExc_StopIteration) : PyObject_CallOneArg(PyExc_StopIteration, value); if (exc == NULL) { return -1; } PyErr_SetRaisedException(exc /* stolen */); return 0; } /* * If StopIteration exception is set, fetches its 'value' * attribute if any, otherwise sets pvalue to None. * * Returns 0 if no exception or StopIteration is set. * If any other exception is set, returns -1 and leaves * pvalue unchanged. */ int _PyGen_FetchStopIterationValue(PyObject **pvalue) { PyObject *value = NULL; if (PyErr_ExceptionMatches(PyExc_StopIteration)) { PyObject *exc = PyErr_GetRaisedException(); value = Py_NewRef(((PyStopIterationObject *)exc)->value); Py_DECREF(exc); } else if (PyErr_Occurred()) { return -1; } if (value == NULL) { value = Py_NewRef(Py_None); } *pvalue = value; return 0; } static PyObject * gen_repr(PyObject *self) { PyGenObject *gen = _PyGen_CAST(self); return PyUnicode_FromFormat("<generator object %S at %p>", gen->gi_qualname, gen); } static PyObject * gen_get_name(PyObject *self, void *Py_UNUSED(ignored)) { PyGenObject *op = _PyGen_CAST(self); PyObject *name = FT_ATOMIC_LOAD_PTR_ACQUIRE(op->gi_name); return Py_NewRef(name); } static int gen_set_name(PyObject *self, PyObject *value, void *Py_UNUSED(ignored)) { PyGenObject *op = _PyGen_CAST(self); /* Not legal to del gen.gi_name or to set it to anything * other than a string object. */ if (value == NULL || !PyUnicode_Check(value)) { PyErr_SetString(PyExc_TypeError, "__name__ must be set to a string object"); return -1; } Py_BEGIN_CRITICAL_SECTION(self); // gh-133931: To prevent use-after-free from other threads that reference // the gi_name. _PyObject_XSetRefDelayed(&op->gi_name, Py_NewRef(value)); Py_END_CRITICAL_SECTION(); return 0; } static PyObject * gen_get_qualname(PyObject *self, void *Py_UNUSED(ignored)) { PyGenObject *op = _PyGen_CAST(self); PyObject *qualname = FT_ATOMIC_LOAD_PTR_ACQUIRE(op->gi_qualname); return Py_NewRef(qualname); } static int gen_set_qualname(PyObject *self, PyObject *value, void *Py_UNUSED(ignored)) { PyGenObject *op = _PyGen_CAST(self); /* Not legal to del gen.__qualname__ or to set it to anything * other than a string object. */ if (value == NULL || !PyUnicode_Check(value)) { PyErr_SetString(PyExc_TypeError, "__qualname__ must be set to a string object"); return -1; } Py_BEGIN_CRITICAL_SECTION(self); // gh-133931: To prevent use-after-free from other threads that reference // the gi_qualname. _PyObject_XSetRefDelayed(&op->gi_qualname, Py_NewRef(value)); Py_END_CRITICAL_SECTION(); return 0; } static PyObject * gen_getyieldfrom(PyObject *gen, void *Py_UNUSED(ignored)) { PyObject *yf = _PyGen_yf(_PyGen_CAST(gen)); if (yf == NULL) { Py_RETURN_NONE; } return yf; } static PyObject * gen_getrunning(PyObject *self, void *Py_UNUSED(ignored)) { PyGenObject *gen = _PyGen_CAST(self); if (gen->gi_frame_state == FRAME_EXECUTING) { Py_RETURN_TRUE; } Py_RETURN_FALSE; } static PyObject * gen_getsuspended(PyObject *self, void *Py_UNUSED(ignored)) { PyGenObject *gen = _PyGen_CAST(self); return PyBool_FromLong(FRAME_STATE_SUSPENDED(gen->gi_frame_state)); } static PyObject * _gen_getframe(PyGenObject *gen, const char *const name) { if (PySys_Audit("object.__getattr__", "Os", gen, name) < 0) { return NULL; } if (FRAME_STATE_FINISHED(gen->gi_frame_state)) { Py_RETURN_NONE; } return _Py_XNewRef((PyObject *)_PyFrame_GetFrameObject(&gen->gi_iframe)); } static PyObject * gen_getframe(PyObject *self, void *Py_UNUSED(ignored)) { PyGenObject *gen = _PyGen_CAST(self); return _gen_getframe(gen, "gi_frame"); } static PyObject * _gen_getcode(PyGenObject *gen, const char *const name) { if (PySys_Audit("object.__getattr__", "Os", gen, name) < 0) { return NULL; } return Py_NewRef(_PyGen_GetCode(gen)); } static PyObject * gen_getcode(PyObject *self, void *Py_UNUSED(ignored)) { PyGenObject *gen = _PyGen_CAST(self); return _gen_getcode(gen, "gi_code"); } static PyGetSetDef gen_getsetlist[] = { {"__name__", gen_get_name, gen_set_name, PyDoc_STR("name of the generator")}, {"__qualname__", gen_get_qualname, gen_set_qualname, PyDoc_STR("qualified name of the generator")}, {"gi_yieldfrom", gen_getyieldfrom, NULL, PyDoc_STR("object being iterated by yield from, or None")}, {"gi_running", gen_getrunning, NULL, NULL}, {"gi_frame", gen_getframe, NULL, NULL}, {"gi_suspended", gen_getsuspended, NULL, NULL}, {"gi_code", gen_getcode, NULL, NULL}, {NULL} /* Sentinel */ }; static PyMemberDef gen_memberlist[] = { {NULL} /* Sentinel */ }; static PyObject * gen_sizeof(PyObject *op, PyObject *Py_UNUSED(ignored)) { PyGenObject *gen = _PyGen_CAST(op); Py_ssize_t res; res = offsetof(PyGenObject, gi_iframe) + offsetof(_PyInterpreterFrame, localsplus); PyCodeObject *code = _PyGen_GetCode(gen); res += _PyFrame_NumSlotsForCodeObject(code) * sizeof(PyObject *); return PyLong_FromSsize_t(res); } PyDoc_STRVAR(sizeof__doc__, "gen.__sizeof__() -> size of gen in memory, in bytes"); static PyMethodDef gen_methods[] = { {"send", gen_send, METH_O, send_doc}, {"throw", _PyCFunction_CAST(gen_throw), METH_FASTCALL, throw_doc}, {"close", gen_close, METH_NOARGS, close_doc}, {"__sizeof__", gen_sizeof, METH_NOARGS, sizeof__doc__}, {"__class_getitem__", Py_GenericAlias, METH_O|METH_CLASS, PyDoc_STR("See PEP 585")}, {NULL, NULL} /* Sentinel */ }; static PyAsyncMethods gen_as_async = { 0, /* am_await */ 0, /* am_aiter */ 0, /* am_anext */ PyGen_am_send, /* am_send */ }; PyTypeObject PyGen_Type = { PyVarObject_HEAD_INIT(&PyType_Type, 0) "generator", /* tp_name */ offsetof(PyGenObject, gi_iframe.localsplus), /* tp_basicsize */ sizeof(PyObject *), /* tp_itemsize */ /* methods */ gen_dealloc, /* tp_dealloc */ 0, /* tp_vectorcall_offset */ 0, /* tp_getattr */ 0, /* tp_setattr */ &gen_as_async, /* tp_as_async */ gen_repr, /* tp_repr */ 0, /* tp_as_number */ 0, /* tp_as_sequence */ 0, /* tp_as_mapping */ 0, /* tp_hash */ 0, /* tp_call */ 0, /* tp_str */ PyObject_GenericGetAttr, /* tp_getattro */ 0, /* tp_setattro */ 0, /* tp_as_buffer */ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */ 0, /* tp_doc */ gen_traverse, /* tp_traverse */ 0, /* tp_clear */ 0, /* tp_richcompare */ offsetof(PyGenObject, gi_weakreflist), /* tp_weaklistoffset */ PyObject_SelfIter, /* tp_iter */ gen_iternext, /* tp_iternext */ gen_methods, /* tp_methods */ gen_memberlist, /* tp_members */ gen_getsetlist, /* tp_getset */ 0, /* tp_base */ 0, /* tp_dict */ 0, /* tp_descr_get */ 0, /* tp_descr_set */ 0, /* tp_dictoffset */ 0, /* tp_init */ 0, /* tp_alloc */ 0, /* tp_new */ 0, /* tp_free */ 0, /* tp_is_gc */ 0, /* tp_bases */ 0, /* tp_mro */ 0, /* tp_cache */ 0, /* tp_subclasses */ 0, /* tp_weaklist */ 0, /* tp_del */ 0, /* tp_version_tag */ _PyGen_Finalize, /* tp_finalize */ }; static PyObject * make_gen(PyTypeObject *type, PyFunctionObject *func) { PyCodeObject *code = (PyCodeObject *)func->func_code; int slots = _PyFrame_NumSlotsForCodeObject(code); PyGenObject *gen = PyObject_GC_NewVar(PyGenObject, type, slots); if (gen == NULL) { return NULL; } gen->gi_frame_state = FRAME_CLEARED; gen->gi_weakreflist = NULL; gen->gi_exc_state.exc_value = NULL; gen->gi_exc_state.previous_item = NULL; gen->gi_iframe.f_executable = PyStackRef_None; assert(func->func_name != NULL); gen->gi_name = Py_NewRef(func->func_name); assert(func->func_qualname != NULL); gen->gi_qualname = Py_NewRef(func->func_qualname); _PyObject_GC_TRACK(gen); return (PyObject *)gen; } static PyObject * compute_cr_origin(int origin_depth, _PyInterpreterFrame *current_frame); PyObject * _Py_MakeCoro(PyFunctionObject *func) { int coro_flags = ((PyCodeObject *)func->func_code)->co_flags & (CO_GENERATOR | CO_COROUTINE | CO_ASYNC_GENERATOR); assert(coro_flags); if (coro_flags == CO_GENERATOR) { return make_gen(&PyGen_Type, func); } if (coro_flags == CO_ASYNC_GENERATOR) { PyAsyncGenObject *ag; ag = (PyAsyncGenObject *)make_gen(&PyAsyncGen_Type, func); if (ag == NULL) { return NULL; } ag->ag_origin_or_finalizer = NULL; ag->ag_closed = 0; ag->ag_hooks_inited = 0; ag->ag_running_async = 0; return (PyObject*)ag; } assert (coro_flags == CO_COROUTINE); PyObject *coro = make_gen(&PyCoro_Type, func); if (!coro) { return NULL; } PyThreadState *tstate = _PyThreadState_GET(); int origin_depth = tstate->coroutine_origin_tracking_depth; if (origin_depth == 0) { ((PyCoroObject *)coro)->cr_origin_or_finalizer = NULL; } else { _PyInterpreterFrame *frame = tstate->current_frame; assert(frame); assert(_PyFrame_IsIncomplete(frame)); frame = _PyFrame_GetFirstComplete(frame->previous); PyObject *cr_origin = compute_cr_origin(origin_depth, frame); ((PyCoroObject *)coro)->cr_origin_or_finalizer = cr_origin; if (!cr_origin) { Py_DECREF(coro); return NULL; } } return coro; } static PyObject * gen_new_with_qualname(PyTypeObject *type, PyFrameObject *f, PyObject *name, PyObject *qualname) { PyCodeObject *code = _PyFrame_GetCode(f->f_frame); int size = code->co_nlocalsplus + code->co_stacksize; PyGenObject *gen = PyObject_GC_NewVar(PyGenObject, type, size); if (gen == NULL) { Py_DECREF(f); return NULL; } /* Copy the frame */ assert(f->f_frame->frame_obj == NULL); assert(f->f_frame->owner == FRAME_OWNED_BY_FRAME_OBJECT); _PyInterpreterFrame *frame = &gen->gi_iframe; _PyFrame_Copy((_PyInterpreterFrame *)f->_f_frame_data, frame); gen->gi_frame_state = FRAME_CREATED; assert(frame->frame_obj == f); f->f_frame = frame; frame->owner = FRAME_OWNED_BY_GENERATOR; assert(PyObject_GC_IsTracked((PyObject *)f)); Py_DECREF(f); gen->gi_weakreflist = NULL; gen->gi_exc_state.exc_value = NULL; gen->gi_exc_state.previous_item = NULL; if (name != NULL) gen->gi_name = Py_NewRef(name); else gen->gi_name = Py_NewRef(_PyGen_GetCode(gen)->co_name); if (qualname != NULL) gen->gi_qualname = Py_NewRef(qualname); else gen->gi_qualname = Py_NewRef(_PyGen_GetCode(gen)->co_qualname); _PyObject_GC_TRACK(gen); return (PyObject *)gen; } PyObject * PyGen_NewWithQualName(PyFrameObject *f, PyObject *name, PyObject *qualname) { return gen_new_with_qualname(&PyGen_Type, f, name, qualname); } PyObject * PyGen_New(PyFrameObject *f) { return gen_new_with_qualname(&PyGen_Type, f, NULL, NULL); } /* Coroutine Object */ typedef struct { PyObject_HEAD PyCoroObject *cw_coroutine; } PyCoroWrapper; #define _PyCoroWrapper_CAST(op) \ (assert(Py_IS_TYPE((op), &_PyCoroWrapper_Type)), \ _Py_CAST(PyCoroWrapper*, (op))) static int gen_is_coroutine(PyObject *o) { if (PyGen_CheckExact(o)) { PyCodeObject *code = _PyGen_GetCode((PyGenObject*)o); if (code->co_flags & CO_ITERABLE_COROUTINE) { return 1; } } return 0; } /* * This helper function returns an awaitable for `o`: * - `o` if `o` is a coroutine-object; * - `type(o)->tp_as_async->am_await(o)` * * Raises a TypeError if it's not possible to return * an awaitable and returns NULL. */ PyObject * _PyCoro_GetAwaitableIter(PyObject *o) { unaryfunc getter = NULL; PyTypeObject *ot; if (PyCoro_CheckExact(o) || gen_is_coroutine(o)) { /* 'o' is a coroutine. */ return Py_NewRef(o); } ot = Py_TYPE(o); if (ot->tp_as_async != NULL) { getter = ot->tp_as_async->am_await; } if (getter != NULL) { PyObject *res = (*getter)(o); if (res != NULL) { if (PyCoro_CheckExact(res) || gen_is_coroutine(res)) { /* __await__ must return an *iterator*, not a coroutine or another awaitable (see PEP 492) */ PyErr_Format(PyExc_TypeError, "%T.__await__() must return an iterator, " "not coroutine", o); Py_CLEAR(res); } else if (!PyIter_Check(res)) { PyErr_Format(PyExc_TypeError, "%T.__await__() must return an iterator, " "not %T", o, res); Py_CLEAR(res); } } return res; } PyErr_Format(PyExc_TypeError, "'%.100s' object can't be awaited", ot->tp_name); return NULL; } static PyObject * coro_repr(PyObject *self) { PyCoroObject *coro = _PyCoroObject_CAST(self); return PyUnicode_FromFormat("<coroutine object %S at %p>", coro->cr_qualname, coro); } static PyObject * coro_await(PyObject *coro) { PyCoroWrapper *cw = PyObject_GC_New(PyCoroWrapper, &_PyCoroWrapper_Type); if (cw == NULL) { return NULL; } cw->cw_coroutine = (PyCoroObject*)Py_NewRef(coro); _PyObject_GC_TRACK(cw); return (PyObject *)cw; } static PyObject * coro_get_cr_await(PyObject *coro, void *Py_UNUSED(ignored)) { PyObject *yf = _PyGen_yf((PyGenObject *) coro); if (yf == NULL) Py_RETURN_NONE; return yf; } static PyObject * cr_getsuspended(PyObject *self, void *Py_UNUSED(ignored)) { PyCoroObject *coro = _PyCoroObject_CAST(self); if (FRAME_STATE_SUSPENDED(coro->cr_frame_state)) { Py_RETURN_TRUE; } Py_RETURN_FALSE; } static PyObject * cr_getrunning(PyObject *self, void *Py_UNUSED(ignored)) { PyCoroObject *coro = _PyCoroObject_CAST(self); if (coro->cr_frame_state == FRAME_EXECUTING) { Py_RETURN_TRUE; } Py_RETURN_FALSE; } static PyObject * cr_getframe(PyObject *coro, void *Py_UNUSED(ignored)) { return _gen_getframe(_PyGen_CAST(coro), "cr_frame"); } static PyObject * cr_getcode(PyObject *coro, void *Py_UNUSED(ignored)) { return _gen_getcode(_PyGen_CAST(coro), "cr_code"); } static PyGetSetDef coro_getsetlist[] = { {"__name__", gen_get_name, gen_set_name, PyDoc_STR("name of the coroutine")}, {"__qualname__", gen_get_qualname, gen_set_qualname, PyDoc_STR("qualified name of the coroutine")}, {"cr_await", coro_get_cr_await, NULL, PyDoc_STR("object being awaited on, or None")}, {"cr_running", cr_getrunning, NULL, NULL}, {"cr_frame", cr_getframe, NULL, NULL}, {"cr_code", cr_getcode, NULL, NULL}, {"cr_suspended", cr_getsuspended, NULL, NULL}, {NULL} /* Sentinel */ }; static PyMemberDef coro_memberlist[] = { {"cr_origin", _Py_T_OBJECT, offsetof(PyCoroObject, cr_origin_or_finalizer), Py_READONLY}, {NULL} /* Sentinel */ }; PyDoc_STRVAR(coro_send_doc, "send(arg) -> send 'arg' into coroutine,\n\ return next iterated value or raise StopIteration."); PyDoc_STRVAR(coro_throw_doc, "throw(value)\n\ throw(type[,value[,traceback]])\n\ \n\ Raise exception in coroutine, return next iterated value or raise\n\ StopIteration.\n\ the (type, val, tb) signature is deprecated, \n\ and may be removed in a future version of Python."); PyDoc_STRVAR(coro_close_doc, "close() -> raise GeneratorExit inside coroutine."); static PyMethodDef coro_methods[] = { {"send", gen_send, METH_O, coro_send_doc}, {"throw",_PyCFunction_CAST(gen_throw), METH_FASTCALL, coro_throw_doc}, {"close", gen_close, METH_NOARGS, coro_close_doc}, {"__sizeof__", gen_sizeof, METH_NOARGS, sizeof__doc__}, {"__class_getitem__", Py_GenericAlias, METH_O|METH_CLASS, PyDoc_STR("See PEP 585")}, {NULL, NULL} /* Sentinel */ }; static PyAsyncMethods coro_as_async = { coro_await, /* am_await */ 0, /* am_aiter */ 0, /* am_anext */ PyGen_am_send, /* am_send */ }; PyTypeObject PyCoro_Type = { PyVarObject_HEAD_INIT(&PyType_Type, 0) "coroutine", /* tp_name */ offsetof(PyCoroObject, cr_iframe.localsplus),/* tp_basicsize */ sizeof(PyObject *), /* tp_itemsize */ /* methods */ gen_dealloc, /* tp_dealloc */ 0, /* tp_vectorcall_offset */ 0, /* tp_getattr */ 0, /* tp_setattr */ &coro_as_async, /* tp_as_async */ coro_repr, /* tp_repr */ 0, /* tp_as_number */ 0, /* tp_as_sequence */ 0, /* tp_as_mapping */ 0, /* tp_hash */ 0, /* tp_call */ 0, /* tp_str */ PyObject_GenericGetAttr, /* tp_getattro */ 0, /* tp_setattro */ 0, /* tp_as_buffer */ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */ 0, /* tp_doc */ gen_traverse, /* tp_traverse */ 0, /* tp_clear */ 0, /* tp_richcompare */ offsetof(PyCoroObject, cr_weakreflist), /* tp_weaklistoffset */ 0, /* tp_iter */ 0, /* tp_iternext */ coro_methods, /* tp_methods */ coro_memberlist, /* tp_members */ coro_getsetlist, /* tp_getset */ 0, /* tp_base */ 0, /* tp_dict */ 0, /* tp_descr_get */ 0, /* tp_descr_set */ 0, /* tp_dictoffset */ 0, /* tp_init */ 0, /* tp_alloc */ 0, /* tp_new */ 0, /* tp_free */ 0, /* tp_is_gc */ 0, /* tp_bases */ 0, /* tp_mro */ 0, /* tp_cache */ 0, /* tp_subclasses */ 0, /* tp_weaklist */ 0, /* tp_del */ 0, /* tp_version_tag */ _PyGen_Finalize, /* tp_finalize */ }; static void coro_wrapper_dealloc(PyObject *self) { PyCoroWrapper *cw = _PyCoroWrapper_CAST(self); _PyObject_GC_UNTRACK((PyObject *)cw); Py_CLEAR(cw->cw_coroutine); PyObject_GC_Del(cw); } static PyObject * coro_wrapper_iternext(PyObject *self) { PyCoroWrapper *cw = _PyCoroWrapper_CAST(self); return gen_iternext((PyObject *)cw->cw_coroutine); } static PyObject * coro_wrapper_send(PyObject *self, PyObject *arg) { PyCoroWrapper *cw = _PyCoroWrapper_CAST(self); return gen_send((PyObject *)cw->cw_coroutine, arg); } static PyObject * coro_wrapper_throw(PyObject *self, PyObject *const *args, Py_ssize_t nargs) { PyCoroWrapper *cw = _PyCoroWrapper_CAST(self); return gen_throw((PyObject*)cw->cw_coroutine, args, nargs); } static PyObject * coro_wrapper_close(PyObject *self, PyObject *args) { PyCoroWrapper *cw = _PyCoroWrapper_CAST(self); return gen_close((PyObject *)cw->cw_coroutine, args); } static int coro_wrapper_traverse(PyObject *self, visitproc visit, void *arg) { PyCoroWrapper *cw = _PyCoroWrapper_CAST(self); Py_VISIT((PyObject *)cw->cw_coroutine); return 0; } static PyMethodDef coro_wrapper_methods[] = { {"send", coro_wrapper_send, METH_O, coro_send_doc}, {"throw", _PyCFunction_CAST(coro_wrapper_throw), METH_FASTCALL, coro_throw_doc}, {"close", coro_wrapper_close, METH_NOARGS, coro_close_doc}, {NULL, NULL} /* Sentinel */ }; PyTypeObject _PyCoroWrapper_Type = { PyVarObject_HEAD_INIT(&PyType_Type, 0) "coroutine_wrapper", sizeof(PyCoroWrapper), /* tp_basicsize */ 0, /* tp_itemsize */ coro_wrapper_dealloc, /* destructor tp_dealloc */ 0, /* tp_vectorcall_offset */ 0, /* tp_getattr */ 0, /* tp_setattr */ 0, /* tp_as_async */ 0, /* tp_repr */ 0, /* tp_as_number */ 0, /* tp_as_sequence */ 0, /* tp_as_mapping */ 0, /* tp_hash */ 0, /* tp_call */ 0, /* tp_str */ PyObject_GenericGetAttr, /* tp_getattro */ 0, /* tp_setattro */ 0, /* tp_as_buffer */ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */ "A wrapper object implementing __await__ for coroutines.", coro_wrapper_traverse, /* tp_traverse */ 0, /* tp_clear */ 0, /* tp_richcompare */ 0, /* tp_weaklistoffset */ PyObject_SelfIter, /* tp_iter */ coro_wrapper_iternext, /* tp_iternext */ coro_wrapper_methods, /* tp_methods */ 0, /* tp_members */ 0, /* tp_getset */ 0, /* tp_base */ 0, /* tp_dict */ 0, /* tp_descr_get */ 0, /* tp_descr_set */ 0, /* tp_dictoffset */ 0, /* tp_init */ 0, /* tp_alloc */ 0, /* tp_new */ 0, /* tp_free */ }; static PyObject * compute_cr_origin(int origin_depth, _PyInterpreterFrame *current_frame) { _PyInterpreterFrame *frame = current_frame; /* First count how many frames we have */ int frame_count = 0; for (; frame && frame_count < origin_depth; ++frame_count) { frame = _PyFrame_GetFirstComplete(frame->previous); } /* Now collect them */ PyObject *cr_origin = PyTuple_New(frame_count); if (cr_origin == NULL) { return NULL; } frame = current_frame; for (int i = 0; i < frame_count; ++i) { PyCodeObject *code = _PyFrame_GetCode(frame); int line = PyUnstable_InterpreterFrame_GetLine(frame); PyObject *frameinfo = Py_BuildValue("OiO", code->co_filename, line, code->co_name); if (!frameinfo) { Py_DECREF(cr_origin); return NULL; } PyTuple_SET_ITEM(cr_origin, i, frameinfo); frame = _PyFrame_GetFirstComplete(frame->previous); } return cr_origin; } PyObject * PyCoro_New(PyFrameObject *f, PyObject *name, PyObject *qualname) { PyObject *coro = gen_new_with_qualname(&PyCoro_Type, f, name, qualname); if (!coro) { return NULL; } PyThreadState *tstate = _PyThreadState_GET(); int origin_depth = tstate->coroutine_origin_tracking_depth; if (origin_depth == 0) { ((PyCoroObject *)coro)->cr_origin_or_finalizer = NULL; } else { PyObject *cr_origin = compute_cr_origin(origin_depth, _PyEval_GetFrame()); ((PyCoroObject *)coro)->cr_origin_or_finalizer = cr_origin; if (!cr_origin) { Py_DECREF(coro); return NULL; } } return coro; } /* ========= Asynchronous Generators ========= */ typedef enum { AWAITABLE_STATE_INIT, /* new awaitable, has not yet been iterated */ AWAITABLE_STATE_ITER, /* being iterated */ AWAITABLE_STATE_CLOSED, /* closed */ } AwaitableState; typedef struct PyAsyncGenASend { PyObject_HEAD PyAsyncGenObject *ags_gen; /* Can be NULL, when in the __anext__() mode (equivalent of "asend(None)") */ PyObject *ags_sendval; AwaitableState ags_state; } PyAsyncGenASend; #define _PyAsyncGenASend_CAST(op) \ _Py_CAST(PyAsyncGenASend*, (op)) typedef struct PyAsyncGenAThrow { PyObject_HEAD PyAsyncGenObject *agt_gen; /* Can be NULL, when in the "aclose()" mode (equivalent of "athrow(GeneratorExit)") */ PyObject *agt_typ; PyObject *agt_tb; PyObject *agt_val; AwaitableState agt_state; } PyAsyncGenAThrow; typedef struct _PyAsyncGenWrappedValue { PyObject_HEAD PyObject *agw_val; } _PyAsyncGenWrappedValue; #define _PyAsyncGenWrappedValue_CheckExact(o) \ Py_IS_TYPE(o, &_PyAsyncGenWrappedValue_Type) #define _PyAsyncGenWrappedValue_CAST(op) \ (assert(_PyAsyncGenWrappedValue_CheckExact(op)), \ _Py_CAST(_PyAsyncGenWrappedValue*, (op))) static int async_gen_traverse(PyObject *self, visitproc visit, void *arg) { PyAsyncGenObject *ag = _PyAsyncGenObject_CAST(self); Py_VISIT(ag->ag_origin_or_finalizer); return gen_traverse((PyObject*)ag, visit, arg); } static PyObject * async_gen_repr(PyObject *self) { PyAsyncGenObject *o = _PyAsyncGenObject_CAST(self); return PyUnicode_FromFormat("<async_generator object %S at %p>", o->ag_qualname, o); } static int async_gen_init_hooks(PyAsyncGenObject *o) { PyThreadState *tstate; PyObject *finalizer; PyObject *firstiter; if (o->ag_hooks_inited) { return 0; } o->ag_hooks_inited = 1; tstate = _PyThreadState_GET(); finalizer = tstate->async_gen_finalizer; if (finalizer) { o->ag_origin_or_finalizer = Py_NewRef(finalizer); } firstiter = tstate->async_gen_firstiter; if (firstiter) { PyObject *res; Py_INCREF(firstiter); res = PyObject_CallOneArg(firstiter, (PyObject *)o); Py_DECREF(firstiter); if (res == NULL) { return 1; } Py_DECREF(res); } return 0; } static PyObject * async_gen_anext(PyObject *self) { PyAsyncGenObject *ag = _PyAsyncGenObject_CAST(self); if (async_gen_init_hooks(ag)) { return NULL; } return async_gen_asend_new(ag, NULL); } static PyObject * async_gen_asend(PyObject *op, PyObject *arg) { PyAsyncGenObject *o = (PyAsyncGenObject*)op; if (async_gen_init_hooks(o)) { return NULL; } return async_gen_asend_new(o, arg); } static PyObject * async_gen_aclose(PyObject *op, PyObject *arg) { PyAsyncGenObject *o = (PyAsyncGenObject*)op; if (async_gen_init_hooks(o)) { return NULL; } return async_gen_athrow_new(o, NULL); } static PyObject * async_gen_athrow(PyObject *op, PyObject *args) { PyAsyncGenObject *o = (PyAsyncGenObject*)op; if (PyTuple_GET_SIZE(args) > 1) { if (PyErr_WarnEx(PyExc_DeprecationWarning, "the (type, exc, tb) signature of athrow() is deprecated, " "use the single-arg signature instead.", 1) < 0) { return NULL; } } if (async_gen_init_hooks(o)) { return NULL; } return async_gen_athrow_new(o, args); } static PyObject * ag_getframe(PyObject *ag, void *Py_UNUSED(ignored)) { return _gen_getframe((PyGenObject *)ag, "ag_frame"); } static PyObject * ag_getcode(PyObject *gen, void *Py_UNUSED(ignored)) { return _gen_getcode((PyGenObject*)gen, "ag_code"); } static PyObject * ag_getsuspended(PyObject *self, void *Py_UNUSED(ignored)) { PyAsyncGenObject *ag = _PyAsyncGenObject_CAST(self); if (FRAME_STATE_SUSPENDED(ag->ag_frame_state)) { Py_RETURN_TRUE; } Py_RETURN_FALSE; } static PyGetSetDef async_gen_getsetlist[] = { {"__name__", gen_get_name, gen_set_name, PyDoc_STR("name of the async generator")}, {"__qualname__", gen_get_qualname, gen_set_qualname, PyDoc_STR("qualified name of the async generator")}, {"ag_await", coro_get_cr_await, NULL, PyDoc_STR("object being awaited on, or None")}, {"ag_frame", ag_getframe, NULL, NULL}, {"ag_code", ag_getcode, NULL, NULL}, {"ag_suspended", ag_getsuspended, NULL, NULL}, {NULL} /* Sentinel */ }; static PyMemberDef async_gen_memberlist[] = { {"ag_running", Py_T_BOOL, offsetof(PyAsyncGenObject, ag_running_async), Py_READONLY}, {NULL} /* Sentinel */ }; PyDoc_STRVAR(async_aclose_doc, "aclose() -> raise GeneratorExit inside generator."); PyDoc_STRVAR(async_asend_doc, "asend(v) -> send 'v' in generator."); PyDoc_STRVAR(async_athrow_doc, "athrow(value)\n\ athrow(type[,value[,tb]])\n\ \n\ raise exception in generator.\n\ the (type, val, tb) signature is deprecated, \n\ and may be removed in a future version of Python."); static PyMethodDef async_gen_methods[] = { {"asend", async_gen_asend, METH_O, async_asend_doc}, {"athrow", async_gen_athrow, METH_VARARGS, async_athrow_doc}, {"aclose", async_gen_aclose, METH_NOARGS, async_aclose_doc}, {"__sizeof__", gen_sizeof, METH_NOARGS, sizeof__doc__}, {"__class_getitem__", Py_GenericAlias, METH_O|METH_CLASS, PyDoc_STR("See PEP 585")}, {NULL, NULL} /* Sentinel */ }; static PyAsyncMethods async_gen_as_async = { 0, /* am_await */ PyObject_SelfIter, /* am_aiter */ async_gen_anext, /* am_anext */ PyGen_am_send, /* am_send */ }; PyTypeObject PyAsyncGen_Type = { PyVarObject_HEAD_INIT(&PyType_Type, 0) "async_generator", /* tp_name */ offsetof(PyAsyncGenObject, ag_iframe.localsplus), /* tp_basicsize */ sizeof(PyObject *), /* tp_itemsize */ /* methods */ gen_dealloc, /* tp_dealloc */ 0, /* tp_vectorcall_offset */ 0, /* tp_getattr */ 0, /* tp_setattr */ &async_gen_as_async, /* tp_as_async */ async_gen_repr, /* tp_repr */ 0, /* tp_as_number */ 0, /* tp_as_sequence */ 0, /* tp_as_mapping */ 0, /* tp_hash */ 0, /* tp_call */ 0, /* tp_str */ PyObject_GenericGetAttr, /* tp_getattro */ 0, /* tp_setattro */ 0, /* tp_as_buffer */ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */ 0, /* tp_doc */ async_gen_traverse, /* tp_traverse */ 0, /* tp_clear */ 0, /* tp_richcompare */ offsetof(PyAsyncGenObject, ag_weakreflist), /* tp_weaklistoffset */ 0, /* tp_iter */ 0, /* tp_iternext */ async_gen_methods, /* tp_methods */ async_gen_memberlist, /* tp_members */ async_gen_getsetlist, /* tp_getset */ 0, /* tp_base */ 0, /* tp_dict */ 0, /* tp_descr_get */ 0, /* tp_descr_set */ 0, /* tp_dictoffset */ 0, /* tp_init */ 0, /* tp_alloc */ 0, /* tp_new */ 0, /* tp_free */ 0, /* tp_is_gc */ 0, /* tp_bases */ 0, /* tp_mro */ 0, /* tp_cache */ 0, /* tp_subclasses */ 0, /* tp_weaklist */ 0, /* tp_del */ 0, /* tp_version_tag */ _PyGen_Finalize, /* tp_finalize */ }; PyObject * PyAsyncGen_New(PyFrameObject *f, PyObject *name, PyObject *qualname) { PyAsyncGenObject *ag; ag = (PyAsyncGenObject *)gen_new_with_qualname(&PyAsyncGen_Type, f, name, qualname); if (ag == NULL) { return NULL; } ag->ag_origin_or_finalizer = NULL; ag->ag_closed = 0; ag->ag_hooks_inited = 0; ag->ag_running_async = 0; return (PyObject*)ag; } static PyObject * async_gen_unwrap_value(PyAsyncGenObject *gen, PyObject *result) { if (result == NULL) { if (!PyErr_Occurred()) { PyErr_SetNone(PyExc_StopAsyncIteration); } if (PyErr_ExceptionMatches(PyExc_StopAsyncIteration) || PyErr_ExceptionMatches(PyExc_GeneratorExit) ) { gen->ag_closed = 1; } gen->ag_running_async = 0; return NULL; } if (_PyAsyncGenWrappedValue_CheckExact(result)) { /* async yield */ _PyGen_SetStopIterationValue(((_PyAsyncGenWrappedValue*)result)->agw_val); Py_DECREF(result); gen->ag_running_async = 0; return NULL; } return result; } /* ---------- Async Generator ASend Awaitable ------------ */ static void async_gen_asend_dealloc(PyObject *self) { assert(PyAsyncGenASend_CheckExact(self)); PyAsyncGenASend *ags = _PyAsyncGenASend_CAST(self); if (PyObject_CallFinalizerFromDealloc(self)) { return; } _PyObject_GC_UNTRACK(self); Py_CLEAR(ags->ags_gen); Py_CLEAR(ags->ags_sendval); _PyGC_CLEAR_FINALIZED(self); _Py_FREELIST_FREE(async_gen_asends, self, PyObject_GC_Del); } static int async_gen_asend_traverse(PyObject *self, visitproc visit, void *arg) { PyAsyncGenASend *ags = _PyAsyncGenASend_CAST(self); Py_VISIT(ags->ags_gen); Py_VISIT(ags->ags_sendval); return 0; } static PyObject * async_gen_asend_send(PyObject *self, PyObject *arg) { PyAsyncGenASend *o = _PyAsyncGenASend_CAST(self); if (o->ags_state == AWAITABLE_STATE_CLOSED) { PyErr_SetString( PyExc_RuntimeError, "cannot reuse already awaited __anext__()/asend()"); return NULL; } if (o->ags_state == AWAITABLE_STATE_INIT) { if (o->ags_gen->ag_running_async) { o->ags_state = AWAITABLE_STATE_CLOSED; PyErr_SetString( PyExc_RuntimeError, "anext(): asynchronous generator is already running"); return NULL; } if (arg == NULL || arg == Py_None) { arg = o->ags_sendval; } o->ags_state = AWAITABLE_STATE_ITER; } o->ags_gen->ag_running_async = 1; PyObject *result = gen_send((PyObject*)o->ags_gen, arg); result = async_gen_unwrap_value(o->ags_gen, result); if (result == NULL) { o->ags_state = AWAITABLE_STATE_CLOSED; } return result; } static PyObject * async_gen_asend_iternext(PyObject *ags) { return async_gen_asend_send(ags, NULL); } static PyObject * async_gen_asend_throw(PyObject *self, PyObject *const *args, Py_ssize_t nargs) { PyAsyncGenASend *o = _PyAsyncGenASend_CAST(self); if (o->ags_state == AWAITABLE_STATE_CLOSED) { PyErr_SetString( PyExc_RuntimeError, "cannot reuse already awaited __anext__()/asend()"); return NULL; } if (o->ags_state == AWAITABLE_STATE_INIT) { if (o->ags_gen->ag_running_async) { o->ags_state = AWAITABLE_STATE_CLOSED; PyErr_SetString( PyExc_RuntimeError, "anext(): asynchronous generator is already running"); return NULL; } o->ags_state = AWAITABLE_STATE_ITER; o->ags_gen->ag_running_async = 1; } PyObject *result = gen_throw((PyObject*)o->ags_gen, args, nargs); result = async_gen_unwrap_value(o->ags_gen, result); if (result == NULL) { o->ags_gen->ag_running_async = 0; o->ags_state = AWAITABLE_STATE_CLOSED; } return result; } static PyObject * async_gen_asend_close(PyObject *self, PyObject *args) { PyAsyncGenASend *o = _PyAsyncGenASend_CAST(self); if (o->ags_state == AWAITABLE_STATE_CLOSED) { Py_RETURN_NONE; } PyObject *result = async_gen_asend_throw(self, &PyExc_GeneratorExit, 1); if (result == NULL) { if (PyErr_ExceptionMatches(PyExc_StopIteration) || PyErr_ExceptionMatches(PyExc_StopAsyncIteration) || PyErr_ExceptionMatches(PyExc_GeneratorExit)) { PyErr_Clear(); Py_RETURN_NONE; } return result; } Py_DECREF(result); PyErr_SetString(PyExc_RuntimeError, "coroutine ignored GeneratorExit"); return NULL; } static void async_gen_asend_finalize(PyObject *self) { PyAsyncGenASend *ags = _PyAsyncGenASend_CAST(self); if (ags->ags_state == AWAITABLE_STATE_INIT) { _PyErr_WarnUnawaitedAgenMethod(ags->ags_gen, &_Py_ID(asend)); } } static PyMethodDef async_gen_asend_methods[] = { {"send", async_gen_asend_send, METH_O, send_doc}, {"throw", _PyCFunction_CAST(async_gen_asend_throw), METH_FASTCALL, throw_doc}, {"close", async_gen_asend_close, METH_NOARGS, close_doc}, {NULL, NULL} /* Sentinel */ }; static PyAsyncMethods async_gen_asend_as_async = { PyObject_SelfIter, /* am_await */ 0, /* am_aiter */ 0, /* am_anext */ 0, /* am_send */ }; PyTypeObject _PyAsyncGenASend_Type = { PyVarObject_HEAD_INIT(&PyType_Type, 0) "async_generator_asend", /* tp_name */ sizeof(PyAsyncGenASend), /* tp_basicsize */ 0, /* tp_itemsize */ /* methods */ async_gen_asend_dealloc, /* tp_dealloc */ 0, /* tp_vectorcall_offset */ 0, /* tp_getattr */ 0, /* tp_setattr */ &async_gen_asend_as_async, /* tp_as_async */ 0, /* tp_repr */ 0, /* tp_as_number */ 0, /* tp_as_sequence */ 0, /* tp_as_mapping */ 0, /* tp_hash */ 0, /* tp_call */ 0, /* tp_str */ PyObject_GenericGetAttr, /* tp_getattro */ 0, /* tp_setattro */ 0, /* tp_as_buffer */ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */ 0, /* tp_doc */ async_gen_asend_traverse, /* tp_traverse */ 0, /* tp_clear */ 0, /* tp_richcompare */ 0, /* tp_weaklistoffset */ PyObject_SelfIter, /* tp_iter */ async_gen_asend_iternext, /* tp_iternext */ async_gen_asend_methods, /* tp_methods */ 0, /* tp_members */ 0, /* tp_getset */ 0, /* tp_base */ 0, /* tp_dict */ 0, /* tp_descr_get */ 0, /* tp_descr_set */ 0, /* tp_dictoffset */ 0, /* tp_init */ 0, /* tp_alloc */ 0, /* tp_new */ .tp_finalize = async_gen_asend_finalize, }; static PyObject * async_gen_asend_new(PyAsyncGenObject *gen, PyObject *sendval) { PyAsyncGenASend *ags = _Py_FREELIST_POP(PyAsyncGenASend, async_gen_asends); if (ags == NULL) { ags = PyObject_GC_New(PyAsyncGenASend, &_PyAsyncGenASend_Type); if (ags == NULL) { return NULL; } } ags->ags_gen = (PyAsyncGenObject*)Py_NewRef(gen); ags->ags_sendval = Py_XNewRef(sendval); ags->ags_state = AWAITABLE_STATE_INIT; _PyObject_GC_TRACK((PyObject*)ags); return (PyObject*)ags; } /* ---------- Async Generator Value Wrapper ------------ */ static void async_gen_wrapped_val_dealloc(PyObject *self) { _PyAsyncGenWrappedValue *agw = _PyAsyncGenWrappedValue_CAST(self); _PyObject_GC_UNTRACK(self); Py_CLEAR(agw->agw_val); _Py_FREELIST_FREE(async_gens, self, PyObject_GC_Del); } static int async_gen_wrapped_val_traverse(PyObject *self, visitproc visit, void *arg) { _PyAsyncGenWrappedValue *agw = _PyAsyncGenWrappedValue_CAST(self); Py_VISIT(agw->agw_val); return 0; } PyTypeObject _PyAsyncGenWrappedValue_Type = { PyVarObject_HEAD_INIT(&PyType_Type, 0) "async_generator_wrapped_value", /* tp_name */ sizeof(_PyAsyncGenWrappedValue), /* tp_basicsize */ 0, /* tp_itemsize */ /* methods */ async_gen_wrapped_val_dealloc, /* tp_dealloc */ 0, /* tp_vectorcall_offset */ 0, /* tp_getattr */ 0, /* tp_setattr */ 0, /* tp_as_async */ 0, /* tp_repr */ 0, /* tp_as_number */ 0, /* tp_as_sequence */ 0, /* tp_as_mapping */ 0, /* tp_hash */ 0, /* tp_call */ 0, /* tp_str */ PyObject_GenericGetAttr, /* tp_getattro */ 0, /* tp_setattro */ 0, /* tp_as_buffer */ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */ 0, /* tp_doc */ async_gen_wrapped_val_traverse, /* tp_traverse */ 0, /* tp_clear */ 0, /* tp_richcompare */ 0, /* tp_weaklistoffset */ 0, /* tp_iter */ 0, /* tp_iternext */ 0, /* tp_methods */ 0, /* tp_members */ 0, /* tp_getset */ 0, /* tp_base */ 0, /* tp_dict */ 0, /* tp_descr_get */ 0, /* tp_descr_set */ 0, /* tp_dictoffset */ 0, /* tp_init */ 0, /* tp_alloc */ 0, /* tp_new */ }; PyObject * _PyAsyncGenValueWrapperNew(PyThreadState *tstate, PyObject *val) { assert(val); _PyAsyncGenWrappedValue *o = _Py_FREELIST_POP(_PyAsyncGenWrappedValue, async_gens); if (o == NULL) { o = PyObject_GC_New(_PyAsyncGenWrappedValue, &_PyAsyncGenWrappedValue_Type); if (o == NULL) { return NULL; } } assert(_PyAsyncGenWrappedValue_CheckExact(o)); o->agw_val = Py_NewRef(val); _PyObject_GC_TRACK((PyObject*)o); return (PyObject*)o; } /* ---------- Async Generator AThrow awaitable ------------ */ #define _PyAsyncGenAThrow_CAST(op) \ (assert(Py_IS_TYPE((op), &_PyAsyncGenAThrow_Type)), \ _Py_CAST(PyAsyncGenAThrow*, (op))) static void async_gen_athrow_dealloc(PyObject *self) { PyAsyncGenAThrow *agt = _PyAsyncGenAThrow_CAST(self); if (PyObject_CallFinalizerFromDealloc(self)) { return; } _PyObject_GC_UNTRACK(self); Py_CLEAR(agt->agt_gen); Py_XDECREF(agt->agt_typ); Py_XDECREF(agt->agt_tb); Py_XDECREF(agt->agt_val); PyObject_GC_Del(self); } static int async_gen_athrow_traverse(PyObject *self, visitproc visit, void *arg) { PyAsyncGenAThrow *agt = _PyAsyncGenAThrow_CAST(self); Py_VISIT(agt->agt_gen); Py_VISIT(agt->agt_typ); Py_VISIT(agt->agt_tb); Py_VISIT(agt->agt_val); return 0; } static PyObject * async_gen_athrow_send(PyObject *self, PyObject *arg) { PyAsyncGenAThrow *o = _PyAsyncGenAThrow_CAST(self); PyGenObject *gen = _PyGen_CAST(o->agt_gen); PyObject *retval; if (o->agt_state == AWAITABLE_STATE_CLOSED) { PyErr_SetString( PyExc_RuntimeError, "cannot reuse already awaited aclose()/athrow()"); return NULL; } if (FRAME_STATE_FINISHED(gen->gi_frame_state)) { o->agt_state = AWAITABLE_STATE_CLOSED; PyErr_SetNone(PyExc_StopIteration); return NULL; } if (o->agt_state == AWAITABLE_STATE_INIT) { if (o->agt_gen->ag_running_async) { o->agt_state = AWAITABLE_STATE_CLOSED; if (o->agt_typ == NULL) { PyErr_SetString( PyExc_RuntimeError, "aclose(): asynchronous generator is already running"); } else { PyErr_SetString( PyExc_RuntimeError, "athrow(): asynchronous generator is already running"); } return NULL; } if (o->agt_gen->ag_closed) { o->agt_state = AWAITABLE_STATE_CLOSED; PyErr_SetNone(PyExc_StopAsyncIteration); return NULL; } if (arg != Py_None) { PyErr_SetString(PyExc_RuntimeError, NON_INIT_CORO_MSG); return NULL; } o->agt_state = AWAITABLE_STATE_ITER; o->agt_gen->ag_running_async = 1; if (o->agt_typ == NULL) { /* aclose() mode */ o->agt_gen->ag_closed = 1; retval = _gen_throw((PyGenObject *)gen, 0, /* Do not close generator when PyExc_GeneratorExit is passed */ PyExc_GeneratorExit, NULL, NULL); if (retval && _PyAsyncGenWrappedValue_CheckExact(retval)) { Py_DECREF(retval); goto yield_close; } } else { retval = _gen_throw((PyGenObject *)gen, 0, /* Do not close generator when PyExc_GeneratorExit is passed */ o->agt_typ, o->agt_val, o->agt_tb); retval = async_gen_unwrap_value(o->agt_gen, retval); } if (retval == NULL) { goto check_error; } return retval; } assert(o->agt_state == AWAITABLE_STATE_ITER); retval = gen_send((PyObject *)gen, arg); if (o->agt_typ) { return async_gen_unwrap_value(o->agt_gen, retval); } else { /* aclose() mode */ if (retval) { if (_PyAsyncGenWrappedValue_CheckExact(retval)) { Py_DECREF(retval); goto yield_close; } else { return retval; } } else { goto check_error; } } yield_close: o->agt_gen->ag_running_async = 0; o->agt_state = AWAITABLE_STATE_CLOSED; PyErr_SetString( PyExc_RuntimeError, ASYNC_GEN_IGNORED_EXIT_MSG); return NULL; check_error: o->agt_gen->ag_running_async = 0; o->agt_state = AWAITABLE_STATE_CLOSED; if (PyErr_ExceptionMatches(PyExc_StopAsyncIteration) || PyErr_ExceptionMatches(PyExc_GeneratorExit)) { if (o->agt_typ == NULL) { /* when aclose() is called we don't want to propagate StopAsyncIteration or GeneratorExit; just raise StopIteration, signalling that this 'aclose()' await is done. */ PyErr_Clear(); PyErr_SetNone(PyExc_StopIteration); } } return NULL; } static PyObject * async_gen_athrow_throw(PyObject *self, PyObject *const *args, Py_ssize_t nargs) { PyAsyncGenAThrow *o = _PyAsyncGenAThrow_CAST(self); if (o->agt_state == AWAITABLE_STATE_CLOSED) { PyErr_SetString( PyExc_RuntimeError, "cannot reuse already awaited aclose()/athrow()"); return NULL; } if (o->agt_state == AWAITABLE_STATE_INIT) { if (o->agt_gen->ag_running_async) { o->agt_state = AWAITABLE_STATE_CLOSED; if (o->agt_typ == NULL) { PyErr_SetString( PyExc_RuntimeError, "aclose(): asynchronous generator is already running"); } else { PyErr_SetString( PyExc_RuntimeError, "athrow(): asynchronous generator is already running"); } return NULL; } o->agt_state = AWAITABLE_STATE_ITER; o->agt_gen->ag_running_async = 1; } PyObject *retval = gen_throw((PyObject*)o->agt_gen, args, nargs); if (o->agt_typ) { retval = async_gen_unwrap_value(o->agt_gen, retval); if (retval == NULL) { o->agt_gen->ag_running_async = 0; o->agt_state = AWAITABLE_STATE_CLOSED; } return retval; } else { /* aclose() mode */ if (retval && _PyAsyncGenWrappedValue_CheckExact(retval)) { o->agt_gen->ag_running_async = 0; o->agt_state = AWAITABLE_STATE_CLOSED; Py_DECREF(retval); PyErr_SetString(PyExc_RuntimeError, ASYNC_GEN_IGNORED_EXIT_MSG); return NULL; } if (retval == NULL) { o->agt_gen->ag_running_async = 0; o->agt_state = AWAITABLE_STATE_CLOSED; } if (PyErr_ExceptionMatches(PyExc_StopAsyncIteration) || PyErr_ExceptionMatches(PyExc_GeneratorExit)) { /* when aclose() is called we don't want to propagate StopAsyncIteration or GeneratorExit; just raise StopIteration, signalling that this 'aclose()' await is done. */ PyErr_Clear(); PyErr_SetNone(PyExc_StopIteration); } return retval; } } static PyObject * async_gen_athrow_iternext(PyObject *agt) { return async_gen_athrow_send(agt, Py_None); } static PyObject * async_gen_athrow_close(PyObject *self, PyObject *args) { PyAsyncGenAThrow *agt = _PyAsyncGenAThrow_CAST(self); if (agt->agt_state == AWAITABLE_STATE_CLOSED) { Py_RETURN_NONE; } PyObject *result = async_gen_athrow_throw((PyObject*)agt, &PyExc_GeneratorExit, 1); if (result == NULL) { if (PyErr_ExceptionMatches(PyExc_StopIteration) || PyErr_ExceptionMatches(PyExc_StopAsyncIteration) || PyErr_ExceptionMatches(PyExc_GeneratorExit)) { PyErr_Clear(); Py_RETURN_NONE; } return result; } else { Py_DECREF(result); PyErr_SetString(PyExc_RuntimeError, "coroutine ignored GeneratorExit"); return NULL; } } static void async_gen_athrow_finalize(PyObject *op) { PyAsyncGenAThrow *o = (PyAsyncGenAThrow*)op; if (o->agt_state == AWAITABLE_STATE_INIT) { PyObject *method = o->agt_typ ? &_Py_ID(athrow) : &_Py_ID(aclose); _PyErr_WarnUnawaitedAgenMethod(o->agt_gen, method); } } static PyMethodDef async_gen_athrow_methods[] = { {"send", async_gen_athrow_send, METH_O, send_doc}, {"throw", _PyCFunction_CAST(async_gen_athrow_throw), METH_FASTCALL, throw_doc}, {"close", async_gen_athrow_close, METH_NOARGS, close_doc}, {NULL, NULL} /* Sentinel */ }; static PyAsyncMethods async_gen_athrow_as_async = { PyObject_SelfIter, /* am_await */ 0, /* am_aiter */ 0, /* am_anext */ 0, /* am_send */ }; PyTypeObject _PyAsyncGenAThrow_Type = { PyVarObject_HEAD_INIT(&PyType_Type, 0) "async_generator_athrow", /* tp_name */ sizeof(PyAsyncGenAThrow), /* tp_basicsize */ 0, /* tp_itemsize */ /* methods */ async_gen_athrow_dealloc, /* tp_dealloc */ 0, /* tp_vectorcall_offset */ 0, /* tp_getattr */ 0, /* tp_setattr */ &async_gen_athrow_as_async, /* tp_as_async */ 0, /* tp_repr */ 0, /* tp_as_number */ 0, /* tp_as_sequence */ 0, /* tp_as_mapping */ 0, /* tp_hash */ 0, /* tp_call */ 0, /* tp_str */ PyObject_GenericGetAttr, /* tp_getattro */ 0, /* tp_setattro */ 0, /* tp_as_buffer */ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */ 0, /* tp_doc */ async_gen_athrow_traverse, /* tp_traverse */ 0, /* tp_clear */ 0, /* tp_richcompare */ 0, /* tp_weaklistoffset */ PyObject_SelfIter, /* tp_iter */ async_gen_athrow_iternext, /* tp_iternext */ async_gen_athrow_methods, /* tp_methods */ 0, /* tp_members */ 0, /* tp_getset */ 0, /* tp_base */ 0, /* tp_dict */ 0, /* tp_descr_get */ 0, /* tp_descr_set */ 0, /* tp_dictoffset */ 0, /* tp_init */ 0, /* tp_alloc */ 0, /* tp_new */ .tp_finalize = async_gen_athrow_finalize, }; static PyObject * async_gen_athrow_new(PyAsyncGenObject *gen, PyObject *args) { PyObject *typ = NULL; PyObject *tb = NULL; PyObject *val = NULL; if (args && !PyArg_UnpackTuple(args, "athrow", 1, 3, &typ, &val, &tb)) { return NULL; } PyAsyncGenAThrow *o; o = PyObject_GC_New(PyAsyncGenAThrow, &_PyAsyncGenAThrow_Type); if (o == NULL) { return NULL; } o->agt_gen = (PyAsyncGenObject*)Py_NewRef(gen); o->agt_typ = Py_XNewRef(typ); o->agt_tb = Py_XNewRef(tb); o->agt_val = Py_XNewRef(val); o->agt_state = AWAITABLE_STATE_INIT; _PyObject_GC_TRACK((PyObject*)o); return (PyObject*)o; }