mirror of
https://github.com/python/cpython.git
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2319 lines
75 KiB
C
2319 lines
75 KiB
C
/* Generator object implementation */
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#define _PY_INTERPRETER
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#include "Python.h"
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#include "pycore_call.h" // _PyObject_CallNoArgs()
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#include "pycore_ceval.h" // _PyEval_EvalFrame()
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#include "pycore_frame.h" // _PyInterpreterFrame
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#include "pycore_genobject.h" // struct _Py_async_gen_state
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#include "pycore_object.h" // _PyObject_GC_UNTRACK()
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#include "pycore_pyerrors.h" // _PyErr_ClearExcState()
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#include "pycore_pystate.h" // _PyThreadState_GET()
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#include "structmember.h" // PyMemberDef
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#include "opcode.h" // SEND
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#include "pystats.h"
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static PyObject *gen_close(PyGenObject *, PyObject *);
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static PyObject *async_gen_asend_new(PyAsyncGenObject *, PyObject *);
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static PyObject *async_gen_athrow_new(PyAsyncGenObject *, PyObject *);
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static const char *NON_INIT_CORO_MSG = "can't send non-None value to a "
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"just-started coroutine";
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static const char *ASYNC_GEN_IGNORED_EXIT_MSG =
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"async generator ignored GeneratorExit";
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/* Returns a borrowed reference */
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static inline PyCodeObject *
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_PyGen_GetCode(PyGenObject *gen) {
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_PyInterpreterFrame *frame = (_PyInterpreterFrame *)(gen->gi_iframe);
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return frame->f_code;
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}
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PyCodeObject *
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PyGen_GetCode(PyGenObject *gen) {
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assert(PyGen_Check(gen));
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PyCodeObject *res = _PyGen_GetCode(gen);
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Py_INCREF(res);
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return res;
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}
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static inline int
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exc_state_traverse(_PyErr_StackItem *exc_state, visitproc visit, void *arg)
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{
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Py_VISIT(exc_state->exc_value);
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return 0;
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}
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static int
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gen_traverse(PyGenObject *gen, visitproc visit, void *arg)
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{
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Py_VISIT(gen->gi_name);
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Py_VISIT(gen->gi_qualname);
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if (gen->gi_frame_state < FRAME_CLEARED) {
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_PyInterpreterFrame *frame = (_PyInterpreterFrame *)(gen->gi_iframe);
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assert(frame->frame_obj == NULL ||
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frame->frame_obj->f_frame->owner == FRAME_OWNED_BY_GENERATOR);
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int err = _PyFrame_Traverse(frame, visit, arg);
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if (err) {
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return err;
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}
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}
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/* No need to visit cr_origin, because it's just tuples/str/int, so can't
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participate in a reference cycle. */
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return exc_state_traverse(&gen->gi_exc_state, visit, arg);
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}
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void
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_PyGen_Finalize(PyObject *self)
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{
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PyGenObject *gen = (PyGenObject *)self;
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if (gen->gi_frame_state >= FRAME_COMPLETED) {
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/* Generator isn't paused, so no need to close */
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return;
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}
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if (PyAsyncGen_CheckExact(self)) {
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PyAsyncGenObject *agen = (PyAsyncGenObject*)self;
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PyObject *finalizer = agen->ag_origin_or_finalizer;
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if (finalizer && !agen->ag_closed) {
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/* Save the current exception, if any. */
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PyObject *exc = PyErr_GetRaisedException();
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PyObject *res = PyObject_CallOneArg(finalizer, self);
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if (res == NULL) {
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PyErr_WriteUnraisable(self);
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} else {
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Py_DECREF(res);
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}
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/* Restore the saved exception. */
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PyErr_SetRaisedException(exc);
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return;
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}
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}
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/* Save the current exception, if any. */
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PyObject *exc = PyErr_GetRaisedException();
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/* If `gen` is a coroutine, and if it was never awaited on,
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issue a RuntimeWarning. */
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assert(_PyGen_GetCode(gen) != NULL);
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if (_PyGen_GetCode(gen)->co_flags & CO_COROUTINE &&
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gen->gi_frame_state == FRAME_CREATED)
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{
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_PyErr_WarnUnawaitedCoroutine((PyObject *)gen);
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}
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else {
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PyObject *res = gen_close(gen, NULL);
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if (res == NULL) {
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if (PyErr_Occurred()) {
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PyErr_WriteUnraisable(self);
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}
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}
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else {
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Py_DECREF(res);
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}
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}
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/* Restore the saved exception. */
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PyErr_SetRaisedException(exc);
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}
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static void
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gen_dealloc(PyGenObject *gen)
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{
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PyObject *self = (PyObject *) gen;
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_PyObject_GC_UNTRACK(gen);
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if (gen->gi_weakreflist != NULL)
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PyObject_ClearWeakRefs(self);
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_PyObject_GC_TRACK(self);
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if (PyObject_CallFinalizerFromDealloc(self))
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return; /* resurrected. :( */
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_PyObject_GC_UNTRACK(self);
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if (PyAsyncGen_CheckExact(gen)) {
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/* We have to handle this case for asynchronous generators
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right here, because this code has to be between UNTRACK
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and GC_Del. */
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Py_CLEAR(((PyAsyncGenObject*)gen)->ag_origin_or_finalizer);
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}
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if (gen->gi_frame_state < FRAME_CLEARED) {
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_PyInterpreterFrame *frame = (_PyInterpreterFrame *)gen->gi_iframe;
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gen->gi_frame_state = FRAME_CLEARED;
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frame->previous = NULL;
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_PyFrame_ClearExceptCode(frame);
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}
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if (_PyGen_GetCode(gen)->co_flags & CO_COROUTINE) {
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Py_CLEAR(((PyCoroObject *)gen)->cr_origin_or_finalizer);
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}
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Py_DECREF(_PyGen_GetCode(gen));
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Py_CLEAR(gen->gi_name);
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Py_CLEAR(gen->gi_qualname);
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_PyErr_ClearExcState(&gen->gi_exc_state);
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PyObject_GC_Del(gen);
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}
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static PySendResult
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gen_send_ex2(PyGenObject *gen, PyObject *arg, PyObject **presult,
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int exc, int closing)
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{
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PyThreadState *tstate = _PyThreadState_GET();
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_PyInterpreterFrame *frame = (_PyInterpreterFrame *)gen->gi_iframe;
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PyObject *result;
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*presult = NULL;
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if (gen->gi_frame_state == FRAME_CREATED && arg && arg != Py_None) {
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const char *msg = "can't send non-None value to a "
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"just-started generator";
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if (PyCoro_CheckExact(gen)) {
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msg = NON_INIT_CORO_MSG;
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}
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else if (PyAsyncGen_CheckExact(gen)) {
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msg = "can't send non-None value to a "
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"just-started async generator";
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}
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PyErr_SetString(PyExc_TypeError, msg);
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return PYGEN_ERROR;
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}
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if (gen->gi_frame_state == FRAME_EXECUTING) {
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const char *msg = "generator already executing";
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if (PyCoro_CheckExact(gen)) {
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msg = "coroutine already executing";
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}
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else if (PyAsyncGen_CheckExact(gen)) {
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msg = "async generator already executing";
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}
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PyErr_SetString(PyExc_ValueError, msg);
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return PYGEN_ERROR;
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}
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if (gen->gi_frame_state >= FRAME_COMPLETED) {
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if (PyCoro_CheckExact(gen) && !closing) {
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/* `gen` is an exhausted coroutine: raise an error,
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except when called from gen_close(), which should
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always be a silent method. */
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PyErr_SetString(
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PyExc_RuntimeError,
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"cannot reuse already awaited coroutine");
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}
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else if (arg && !exc) {
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/* `gen` is an exhausted generator:
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only return value if called from send(). */
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*presult = Py_NewRef(Py_None);
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return PYGEN_RETURN;
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}
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return PYGEN_ERROR;
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}
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assert(gen->gi_frame_state < FRAME_EXECUTING);
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/* Push arg onto the frame's value stack */
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result = arg ? arg : Py_None;
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_PyFrame_StackPush(frame, Py_NewRef(result));
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_PyErr_StackItem *prev_exc_info = tstate->exc_info;
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gen->gi_exc_state.previous_item = prev_exc_info;
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tstate->exc_info = &gen->gi_exc_state;
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if (exc) {
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assert(_PyErr_Occurred(tstate));
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_PyErr_ChainStackItem(NULL);
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}
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gen->gi_frame_state = FRAME_EXECUTING;
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EVAL_CALL_STAT_INC(EVAL_CALL_GENERATOR);
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result = _PyEval_EvalFrame(tstate, frame, exc);
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assert(tstate->exc_info == prev_exc_info);
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assert(gen->gi_exc_state.previous_item == NULL);
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assert(gen->gi_frame_state != FRAME_EXECUTING);
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assert(frame->previous == NULL);
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/* If the generator just returned (as opposed to yielding), signal
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* that the generator is exhausted. */
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if (result) {
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if (gen->gi_frame_state == FRAME_SUSPENDED) {
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*presult = result;
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return PYGEN_NEXT;
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}
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assert(result == Py_None || !PyAsyncGen_CheckExact(gen));
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if (result == Py_None && !PyAsyncGen_CheckExact(gen) && !arg) {
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/* Return NULL if called by gen_iternext() */
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Py_CLEAR(result);
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}
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}
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else {
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assert(!PyErr_ExceptionMatches(PyExc_StopIteration));
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assert(!PyAsyncGen_CheckExact(gen) ||
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!PyErr_ExceptionMatches(PyExc_StopAsyncIteration));
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}
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/* generator can't be rerun, so release the frame */
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/* first clean reference cycle through stored exception traceback */
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_PyErr_ClearExcState(&gen->gi_exc_state);
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assert(gen->gi_frame_state == FRAME_CLEARED);
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*presult = result;
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return result ? PYGEN_RETURN : PYGEN_ERROR;
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}
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static PySendResult
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PyGen_am_send(PyGenObject *gen, PyObject *arg, PyObject **result)
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{
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return gen_send_ex2(gen, arg, result, 0, 0);
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}
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static PyObject *
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gen_send_ex(PyGenObject *gen, PyObject *arg, int exc, int closing)
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{
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PyObject *result;
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if (gen_send_ex2(gen, arg, &result, exc, closing) == PYGEN_RETURN) {
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if (PyAsyncGen_CheckExact(gen)) {
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assert(result == Py_None);
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PyErr_SetNone(PyExc_StopAsyncIteration);
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}
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else if (result == Py_None) {
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PyErr_SetNone(PyExc_StopIteration);
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}
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else {
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_PyGen_SetStopIterationValue(result);
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}
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Py_CLEAR(result);
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}
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return result;
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}
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PyDoc_STRVAR(send_doc,
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"send(arg) -> send 'arg' into generator,\n\
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return next yielded value or raise StopIteration.");
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static PyObject *
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gen_send(PyGenObject *gen, PyObject *arg)
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{
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return gen_send_ex(gen, arg, 0, 0);
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}
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PyDoc_STRVAR(close_doc,
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"close() -> raise GeneratorExit inside generator.");
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/*
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* This helper function is used by gen_close and gen_throw to
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* close a subiterator being delegated to by yield-from.
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*/
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static int
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gen_close_iter(PyObject *yf)
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{
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PyObject *retval = NULL;
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if (PyGen_CheckExact(yf) || PyCoro_CheckExact(yf)) {
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retval = gen_close((PyGenObject *)yf, NULL);
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if (retval == NULL)
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return -1;
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}
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else {
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PyObject *meth;
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if (_PyObject_LookupAttr(yf, &_Py_ID(close), &meth) < 0) {
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PyErr_WriteUnraisable(yf);
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}
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if (meth) {
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retval = _PyObject_CallNoArgs(meth);
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Py_DECREF(meth);
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if (retval == NULL)
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return -1;
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}
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}
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Py_XDECREF(retval);
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return 0;
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}
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PyObject *
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_PyGen_yf(PyGenObject *gen)
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{
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PyObject *yf = NULL;
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if (gen->gi_frame_state < FRAME_CLEARED) {
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_PyInterpreterFrame *frame = (_PyInterpreterFrame *)gen->gi_iframe;
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if (gen->gi_frame_state == FRAME_CREATED) {
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/* Return immediately if the frame didn't start yet. SEND
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always come after LOAD_CONST: a code object should not start
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with SEND */
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assert(_PyCode_CODE(_PyGen_GetCode(gen))[0].op.code != SEND);
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return NULL;
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}
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_Py_CODEUNIT next = frame->prev_instr[1];
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if (next.op.code != RESUME || next.op.arg < 2)
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{
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/* Not in a yield from */
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return NULL;
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}
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yf = Py_NewRef(_PyFrame_StackPeek(frame));
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}
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return yf;
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}
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static PyObject *
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gen_close(PyGenObject *gen, PyObject *args)
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{
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PyObject *retval;
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PyObject *yf = _PyGen_yf(gen);
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int err = 0;
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if (gen->gi_frame_state == FRAME_CREATED) {
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gen->gi_frame_state = FRAME_COMPLETED;
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Py_RETURN_NONE;
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}
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if (gen->gi_frame_state >= FRAME_COMPLETED) {
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Py_RETURN_NONE;
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}
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if (yf) {
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PyFrameState state = gen->gi_frame_state;
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gen->gi_frame_state = FRAME_EXECUTING;
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err = gen_close_iter(yf);
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gen->gi_frame_state = state;
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Py_DECREF(yf);
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}
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_PyInterpreterFrame *frame = (_PyInterpreterFrame *)gen->gi_iframe;
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/* It is possible for the previous instruction to not be a
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* YIELD_VALUE if the debugger has changed the lineno. */
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if (err == 0 && frame->prev_instr[0].op.code == YIELD_VALUE) {
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assert(frame->prev_instr[1].op.code == RESUME);
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int exception_handler_depth = frame->prev_instr[0].op.code;
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assert(exception_handler_depth > 0);
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/* We can safely ignore the outermost try block
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* as it automatically generated to handle
|
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* StopIteration. */
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if (exception_handler_depth == 1) {
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Py_RETURN_NONE;
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}
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}
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if (err == 0) {
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PyErr_SetNone(PyExc_GeneratorExit);
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}
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retval = gen_send_ex(gen, Py_None, 1, 1);
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if (retval) {
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const char *msg = "generator ignored GeneratorExit";
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if (PyCoro_CheckExact(gen)) {
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msg = "coroutine ignored GeneratorExit";
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} else if (PyAsyncGen_CheckExact(gen)) {
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msg = ASYNC_GEN_IGNORED_EXIT_MSG;
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}
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Py_DECREF(retval);
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PyErr_SetString(PyExc_RuntimeError, msg);
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return NULL;
|
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}
|
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if (PyErr_ExceptionMatches(PyExc_StopIteration)
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|| PyErr_ExceptionMatches(PyExc_GeneratorExit)) {
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PyErr_Clear(); /* ignore these errors */
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Py_RETURN_NONE;
|
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}
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return NULL;
|
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}
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PyDoc_STRVAR(throw_doc,
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"throw(value)\n\
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throw(type[,value[,tb]])\n\
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\n\
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Raise exception in generator, return next yielded value or raise\n\
|
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StopIteration.\n\
|
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the (type, val, tb) signature is deprecated, \n\
|
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and may be removed in a future version of Python.");
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|
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static PyObject *
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_gen_throw(PyGenObject *gen, int close_on_genexit,
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PyObject *typ, PyObject *val, PyObject *tb)
|
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{
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PyObject *yf = _PyGen_yf(gen);
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|
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if (yf) {
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_PyInterpreterFrame *frame = (_PyInterpreterFrame *)gen->gi_iframe;
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PyObject *ret;
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int err;
|
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if (PyErr_GivenExceptionMatches(typ, PyExc_GeneratorExit) &&
|
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close_on_genexit
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) {
|
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/* Asynchronous generators *should not* be closed right away.
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We have to allow some awaits to work it through, hence the
|
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`close_on_genexit` parameter here.
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*/
|
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PyFrameState state = gen->gi_frame_state;
|
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gen->gi_frame_state = FRAME_EXECUTING;
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err = gen_close_iter(yf);
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gen->gi_frame_state = state;
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Py_DECREF(yf);
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if (err < 0)
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return gen_send_ex(gen, Py_None, 1, 0);
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goto throw_here;
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}
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if (PyGen_CheckExact(yf) || PyCoro_CheckExact(yf)) {
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/* `yf` is a generator or a coroutine. */
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PyThreadState *tstate = _PyThreadState_GET();
|
|
/* Since we are fast-tracking things by skipping the eval loop,
|
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we need to update the current frame so the stack trace
|
|
will be reported correctly to the user. */
|
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/* XXX We should probably be updating the current frame
|
|
somewhere in ceval.c. */
|
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_PyInterpreterFrame *prev = tstate->cframe->current_frame;
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frame->previous = prev;
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tstate->cframe->current_frame = frame;
|
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/* Close the generator that we are currently iterating with
|
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'yield from' or awaiting on with 'await'. */
|
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PyFrameState state = gen->gi_frame_state;
|
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gen->gi_frame_state = FRAME_EXECUTING;
|
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ret = _gen_throw((PyGenObject *)yf, close_on_genexit,
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typ, val, tb);
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gen->gi_frame_state = state;
|
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tstate->cframe->current_frame = prev;
|
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frame->previous = NULL;
|
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} else {
|
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/* `yf` is an iterator or a coroutine-like object. */
|
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PyObject *meth;
|
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if (_PyObject_LookupAttr(yf, &_Py_ID(throw), &meth) < 0) {
|
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Py_DECREF(yf);
|
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return NULL;
|
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}
|
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if (meth == NULL) {
|
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Py_DECREF(yf);
|
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goto throw_here;
|
|
}
|
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PyFrameState state = gen->gi_frame_state;
|
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gen->gi_frame_state = FRAME_EXECUTING;
|
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ret = PyObject_CallFunctionObjArgs(meth, typ, val, tb, NULL);
|
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gen->gi_frame_state = state;
|
|
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(PyGenObject *gen, PyObject *const *args, Py_ssize_t nargs)
|
|
{
|
|
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(PyGenObject *gen)
|
|
{
|
|
PyObject *result;
|
|
assert(PyGen_CheckExact(gen) || PyCoro_CheckExact(gen));
|
|
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)
|
|
{
|
|
PyObject *e;
|
|
|
|
if (value == NULL ||
|
|
(!PyTuple_Check(value) && !PyExceptionInstance_Check(value)))
|
|
{
|
|
/* Delay exception instantiation if we can */
|
|
PyErr_SetObject(PyExc_StopIteration, value);
|
|
return 0;
|
|
}
|
|
/* Construct an exception instance manually with
|
|
* PyObject_CallOneArg and pass it to PyErr_SetObject.
|
|
*
|
|
* We do this to handle a situation when "value" is a tuple, in which
|
|
* case PyErr_SetObject would set the value of StopIteration to
|
|
* the first element of the tuple.
|
|
*
|
|
* (See PyErr_SetObject/_PyErr_CreateException code for details.)
|
|
*/
|
|
e = PyObject_CallOneArg(PyExc_StopIteration, value);
|
|
if (e == NULL) {
|
|
return -1;
|
|
}
|
|
PyErr_SetObject(PyExc_StopIteration, e);
|
|
Py_DECREF(e);
|
|
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(PyGenObject *gen)
|
|
{
|
|
return PyUnicode_FromFormat("<generator object %S at %p>",
|
|
gen->gi_qualname, gen);
|
|
}
|
|
|
|
static PyObject *
|
|
gen_get_name(PyGenObject *op, void *Py_UNUSED(ignored))
|
|
{
|
|
return Py_NewRef(op->gi_name);
|
|
}
|
|
|
|
static int
|
|
gen_set_name(PyGenObject *op, PyObject *value, void *Py_UNUSED(ignored))
|
|
{
|
|
/* 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_XSETREF(op->gi_name, Py_NewRef(value));
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
gen_get_qualname(PyGenObject *op, void *Py_UNUSED(ignored))
|
|
{
|
|
return Py_NewRef(op->gi_qualname);
|
|
}
|
|
|
|
static int
|
|
gen_set_qualname(PyGenObject *op, PyObject *value, void *Py_UNUSED(ignored))
|
|
{
|
|
/* 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_XSETREF(op->gi_qualname, Py_NewRef(value));
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
gen_getyieldfrom(PyGenObject *gen, void *Py_UNUSED(ignored))
|
|
{
|
|
PyObject *yf = _PyGen_yf(gen);
|
|
if (yf == NULL)
|
|
Py_RETURN_NONE;
|
|
return yf;
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
gen_getrunning(PyGenObject *gen, void *Py_UNUSED(ignored))
|
|
{
|
|
if (gen->gi_frame_state == FRAME_EXECUTING) {
|
|
Py_RETURN_TRUE;
|
|
}
|
|
Py_RETURN_FALSE;
|
|
}
|
|
|
|
static PyObject *
|
|
gen_getsuspended(PyGenObject *gen, void *Py_UNUSED(ignored))
|
|
{
|
|
return PyBool_FromLong(gen->gi_frame_state == FRAME_SUSPENDED);
|
|
}
|
|
|
|
static PyObject *
|
|
_gen_getframe(PyGenObject *gen, const char *const name)
|
|
{
|
|
if (PySys_Audit("object.__getattr__", "Os", gen, name) < 0) {
|
|
return NULL;
|
|
}
|
|
if (gen->gi_frame_state == FRAME_CLEARED) {
|
|
Py_RETURN_NONE;
|
|
}
|
|
return _Py_XNewRef((PyObject *)_PyFrame_GetFrameObject((_PyInterpreterFrame *)gen->gi_iframe));
|
|
}
|
|
|
|
static PyObject *
|
|
gen_getframe(PyGenObject *gen, void *Py_UNUSED(ignored))
|
|
{
|
|
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(PyGenObject *gen, void *Py_UNUSED(ignored))
|
|
{
|
|
return _gen_getcode(gen, "gi_code");
|
|
}
|
|
|
|
static PyGetSetDef gen_getsetlist[] = {
|
|
{"__name__", (getter)gen_get_name, (setter)gen_set_name,
|
|
PyDoc_STR("name of the generator")},
|
|
{"__qualname__", (getter)gen_get_qualname, (setter)gen_set_qualname,
|
|
PyDoc_STR("qualified name of the generator")},
|
|
{"gi_yieldfrom", (getter)gen_getyieldfrom, NULL,
|
|
PyDoc_STR("object being iterated by yield from, or None")},
|
|
{"gi_running", (getter)gen_getrunning, NULL, NULL},
|
|
{"gi_frame", (getter)gen_getframe, NULL, NULL},
|
|
{"gi_suspended", (getter)gen_getsuspended, NULL, NULL},
|
|
{"gi_code", (getter)gen_getcode, NULL, NULL},
|
|
{NULL} /* Sentinel */
|
|
};
|
|
|
|
static PyMemberDef gen_memberlist[] = {
|
|
{NULL} /* Sentinel */
|
|
};
|
|
|
|
static PyObject *
|
|
gen_sizeof(PyGenObject *gen, PyObject *Py_UNUSED(ignored))
|
|
{
|
|
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",(PyCFunction)gen_send, METH_O, send_doc},
|
|
{"throw",_PyCFunction_CAST(gen_throw), METH_FASTCALL, throw_doc},
|
|
{"close",(PyCFunction)gen_close, METH_NOARGS, close_doc},
|
|
{"__sizeof__", (PyCFunction)gen_sizeof, METH_NOARGS, sizeof__doc__},
|
|
{NULL, NULL} /* Sentinel */
|
|
};
|
|
|
|
static PyAsyncMethods gen_as_async = {
|
|
0, /* am_await */
|
|
0, /* am_aiter */
|
|
0, /* am_anext */
|
|
(sendfunc)PyGen_am_send, /* am_send */
|
|
};
|
|
|
|
|
|
PyTypeObject PyGen_Type = {
|
|
PyVarObject_HEAD_INIT(&PyType_Type, 0)
|
|
"generator", /* tp_name */
|
|
offsetof(PyGenObject, gi_iframe) +
|
|
offsetof(_PyInterpreterFrame, localsplus), /* tp_basicsize */
|
|
sizeof(PyObject *), /* tp_itemsize */
|
|
/* methods */
|
|
(destructor)gen_dealloc, /* tp_dealloc */
|
|
0, /* tp_vectorcall_offset */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
&gen_as_async, /* tp_as_async */
|
|
(reprfunc)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 */
|
|
(traverseproc)gen_traverse, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
0, /* tp_richcompare */
|
|
offsetof(PyGenObject, gi_weakreflist), /* tp_weaklistoffset */
|
|
PyObject_SelfIter, /* tp_iter */
|
|
(iternextfunc)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;
|
|
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 *o;
|
|
o = (PyAsyncGenObject *)make_gen(&PyAsyncGen_Type, func);
|
|
if (o == NULL) {
|
|
return NULL;
|
|
}
|
|
o->ag_origin_or_finalizer = NULL;
|
|
o->ag_closed = 0;
|
|
o->ag_hooks_inited = 0;
|
|
o->ag_running_async = 0;
|
|
return (PyObject*)o;
|
|
}
|
|
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->cframe->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 = f->f_frame->f_code;
|
|
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 = (_PyInterpreterFrame *)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;
|
|
|
|
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_SetString(PyExc_TypeError,
|
|
"__await__() returned a coroutine");
|
|
Py_CLEAR(res);
|
|
} else if (!PyIter_Check(res)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"__await__() returned non-iterator "
|
|
"of type '%.100s'",
|
|
Py_TYPE(res)->tp_name);
|
|
Py_CLEAR(res);
|
|
}
|
|
}
|
|
return res;
|
|
}
|
|
|
|
PyErr_Format(PyExc_TypeError,
|
|
"object %.100s can't be used in 'await' expression",
|
|
ot->tp_name);
|
|
return NULL;
|
|
}
|
|
|
|
static PyObject *
|
|
coro_repr(PyCoroObject *coro)
|
|
{
|
|
return PyUnicode_FromFormat("<coroutine object %S at %p>",
|
|
coro->cr_qualname, coro);
|
|
}
|
|
|
|
static PyObject *
|
|
coro_await(PyCoroObject *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(PyCoroObject *coro, void *Py_UNUSED(ignored))
|
|
{
|
|
PyObject *yf = _PyGen_yf((PyGenObject *) coro);
|
|
if (yf == NULL)
|
|
Py_RETURN_NONE;
|
|
return yf;
|
|
}
|
|
|
|
static PyObject *
|
|
cr_getsuspended(PyCoroObject *coro, void *Py_UNUSED(ignored))
|
|
{
|
|
if (coro->cr_frame_state == FRAME_SUSPENDED) {
|
|
Py_RETURN_TRUE;
|
|
}
|
|
Py_RETURN_FALSE;
|
|
}
|
|
|
|
static PyObject *
|
|
cr_getrunning(PyCoroObject *coro, void *Py_UNUSED(ignored))
|
|
{
|
|
if (coro->cr_frame_state == FRAME_EXECUTING) {
|
|
Py_RETURN_TRUE;
|
|
}
|
|
Py_RETURN_FALSE;
|
|
}
|
|
|
|
static PyObject *
|
|
cr_getframe(PyCoroObject *coro, void *Py_UNUSED(ignored))
|
|
{
|
|
return _gen_getframe((PyGenObject *)coro, "cr_frame");
|
|
}
|
|
|
|
static PyObject *
|
|
cr_getcode(PyCoroObject *coro, void *Py_UNUSED(ignored))
|
|
{
|
|
return _gen_getcode((PyGenObject *)coro, "cr_code");
|
|
}
|
|
|
|
|
|
static PyGetSetDef coro_getsetlist[] = {
|
|
{"__name__", (getter)gen_get_name, (setter)gen_set_name,
|
|
PyDoc_STR("name of the coroutine")},
|
|
{"__qualname__", (getter)gen_get_qualname, (setter)gen_set_qualname,
|
|
PyDoc_STR("qualified name of the coroutine")},
|
|
{"cr_await", (getter)coro_get_cr_await, NULL,
|
|
PyDoc_STR("object being awaited on, or None")},
|
|
{"cr_running", (getter)cr_getrunning, NULL, NULL},
|
|
{"cr_frame", (getter)cr_getframe, NULL, NULL},
|
|
{"cr_code", (getter)cr_getcode, NULL, NULL},
|
|
{"cr_suspended", (getter)cr_getsuspended, NULL, NULL},
|
|
{NULL} /* Sentinel */
|
|
};
|
|
|
|
static PyMemberDef coro_memberlist[] = {
|
|
{"cr_origin", T_OBJECT, offsetof(PyCoroObject, cr_origin_or_finalizer), 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",(PyCFunction)gen_send, METH_O, coro_send_doc},
|
|
{"throw",_PyCFunction_CAST(gen_throw), METH_FASTCALL, coro_throw_doc},
|
|
{"close",(PyCFunction)gen_close, METH_NOARGS, coro_close_doc},
|
|
{"__sizeof__", (PyCFunction)gen_sizeof, METH_NOARGS, sizeof__doc__},
|
|
{NULL, NULL} /* Sentinel */
|
|
};
|
|
|
|
static PyAsyncMethods coro_as_async = {
|
|
(unaryfunc)coro_await, /* am_await */
|
|
0, /* am_aiter */
|
|
0, /* am_anext */
|
|
(sendfunc)PyGen_am_send, /* am_send */
|
|
};
|
|
|
|
PyTypeObject PyCoro_Type = {
|
|
PyVarObject_HEAD_INIT(&PyType_Type, 0)
|
|
"coroutine", /* tp_name */
|
|
offsetof(PyCoroObject, cr_iframe) +
|
|
offsetof(_PyInterpreterFrame, localsplus), /* tp_basicsize */
|
|
sizeof(PyObject *), /* tp_itemsize */
|
|
/* methods */
|
|
(destructor)gen_dealloc, /* tp_dealloc */
|
|
0, /* tp_vectorcall_offset */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
&coro_as_async, /* tp_as_async */
|
|
(reprfunc)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 */
|
|
(traverseproc)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(PyCoroWrapper *cw)
|
|
{
|
|
_PyObject_GC_UNTRACK((PyObject *)cw);
|
|
Py_CLEAR(cw->cw_coroutine);
|
|
PyObject_GC_Del(cw);
|
|
}
|
|
|
|
static PyObject *
|
|
coro_wrapper_iternext(PyCoroWrapper *cw)
|
|
{
|
|
return gen_iternext((PyGenObject *)cw->cw_coroutine);
|
|
}
|
|
|
|
static PyObject *
|
|
coro_wrapper_send(PyCoroWrapper *cw, PyObject *arg)
|
|
{
|
|
return gen_send((PyGenObject *)cw->cw_coroutine, arg);
|
|
}
|
|
|
|
static PyObject *
|
|
coro_wrapper_throw(PyCoroWrapper *cw, PyObject *const *args, Py_ssize_t nargs)
|
|
{
|
|
return gen_throw((PyGenObject *)cw->cw_coroutine, args, nargs);
|
|
}
|
|
|
|
static PyObject *
|
|
coro_wrapper_close(PyCoroWrapper *cw, PyObject *args)
|
|
{
|
|
return gen_close((PyGenObject *)cw->cw_coroutine, args);
|
|
}
|
|
|
|
static int
|
|
coro_wrapper_traverse(PyCoroWrapper *cw, visitproc visit, void *arg)
|
|
{
|
|
Py_VISIT((PyObject *)cw->cw_coroutine);
|
|
return 0;
|
|
}
|
|
|
|
static PyMethodDef coro_wrapper_methods[] = {
|
|
{"send",(PyCFunction)coro_wrapper_send, METH_O, coro_send_doc},
|
|
{"throw",_PyCFunction_CAST(coro_wrapper_throw),
|
|
METH_FASTCALL, coro_throw_doc},
|
|
{"close",(PyCFunction)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 */
|
|
(destructor)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.",
|
|
(traverseproc)coro_wrapper_traverse, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
0, /* tp_richcompare */
|
|
0, /* tp_weaklistoffset */
|
|
PyObject_SelfIter, /* tp_iter */
|
|
(iternextfunc)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 = frame->f_code;
|
|
int line = _PyInterpreterFrame_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;
|
|
|
|
|
|
typedef struct PyAsyncGenAThrow {
|
|
PyObject_HEAD
|
|
PyAsyncGenObject *agt_gen;
|
|
|
|
/* Can be NULL, when in the "aclose()" mode
|
|
(equivalent of "athrow(GeneratorExit)") */
|
|
PyObject *agt_args;
|
|
|
|
AwaitableState agt_state;
|
|
} PyAsyncGenAThrow;
|
|
|
|
|
|
typedef struct _PyAsyncGenWrappedValue {
|
|
PyObject_HEAD
|
|
PyObject *agw_val;
|
|
} _PyAsyncGenWrappedValue;
|
|
|
|
|
|
#define _PyAsyncGenWrappedValue_CheckExact(o) \
|
|
Py_IS_TYPE(o, &_PyAsyncGenWrappedValue_Type)
|
|
|
|
#define PyAsyncGenASend_CheckExact(o) \
|
|
Py_IS_TYPE(o, &_PyAsyncGenASend_Type)
|
|
|
|
|
|
static int
|
|
async_gen_traverse(PyAsyncGenObject *gen, visitproc visit, void *arg)
|
|
{
|
|
Py_VISIT(gen->ag_origin_or_finalizer);
|
|
return gen_traverse((PyGenObject*)gen, visit, arg);
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
async_gen_repr(PyAsyncGenObject *o)
|
|
{
|
|
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(PyAsyncGenObject *o)
|
|
{
|
|
if (async_gen_init_hooks(o)) {
|
|
return NULL;
|
|
}
|
|
return async_gen_asend_new(o, NULL);
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
async_gen_asend(PyAsyncGenObject *o, PyObject *arg)
|
|
{
|
|
if (async_gen_init_hooks(o)) {
|
|
return NULL;
|
|
}
|
|
return async_gen_asend_new(o, arg);
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
async_gen_aclose(PyAsyncGenObject *o, PyObject *arg)
|
|
{
|
|
if (async_gen_init_hooks(o)) {
|
|
return NULL;
|
|
}
|
|
return async_gen_athrow_new(o, NULL);
|
|
}
|
|
|
|
static PyObject *
|
|
async_gen_athrow(PyAsyncGenObject *o, PyObject *args)
|
|
{
|
|
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(PyAsyncGenObject *ag, void *Py_UNUSED(ignored))
|
|
{
|
|
return _gen_getframe((PyGenObject *)ag, "ag_frame");
|
|
}
|
|
|
|
static PyObject *
|
|
ag_getcode(PyGenObject *gen, void *Py_UNUSED(ignored))
|
|
{
|
|
return _gen_getcode(gen, "ag_code");
|
|
}
|
|
|
|
static PyGetSetDef async_gen_getsetlist[] = {
|
|
{"__name__", (getter)gen_get_name, (setter)gen_set_name,
|
|
PyDoc_STR("name of the async generator")},
|
|
{"__qualname__", (getter)gen_get_qualname, (setter)gen_set_qualname,
|
|
PyDoc_STR("qualified name of the async generator")},
|
|
{"ag_await", (getter)coro_get_cr_await, NULL,
|
|
PyDoc_STR("object being awaited on, or None")},
|
|
{"ag_frame", (getter)ag_getframe, NULL, NULL},
|
|
{"ag_code", (getter)ag_getcode, NULL, NULL},
|
|
{NULL} /* Sentinel */
|
|
};
|
|
|
|
static PyMemberDef async_gen_memberlist[] = {
|
|
{"ag_running", T_BOOL, offsetof(PyAsyncGenObject, ag_running_async),
|
|
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", (PyCFunction)async_gen_asend, METH_O, async_asend_doc},
|
|
{"athrow",(PyCFunction)async_gen_athrow, METH_VARARGS, async_athrow_doc},
|
|
{"aclose", (PyCFunction)async_gen_aclose, METH_NOARGS, async_aclose_doc},
|
|
{"__sizeof__", (PyCFunction)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 */
|
|
(unaryfunc)async_gen_anext, /* am_anext */
|
|
(sendfunc)PyGen_am_send, /* am_send */
|
|
};
|
|
|
|
|
|
PyTypeObject PyAsyncGen_Type = {
|
|
PyVarObject_HEAD_INIT(&PyType_Type, 0)
|
|
"async_generator", /* tp_name */
|
|
offsetof(PyAsyncGenObject, ag_iframe) +
|
|
offsetof(_PyInterpreterFrame, localsplus), /* tp_basicsize */
|
|
sizeof(PyObject *), /* tp_itemsize */
|
|
/* methods */
|
|
(destructor)gen_dealloc, /* tp_dealloc */
|
|
0, /* tp_vectorcall_offset */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
&async_gen_as_async, /* tp_as_async */
|
|
(reprfunc)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 */
|
|
(traverseproc)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 */
|
|
};
|
|
|
|
|
|
#if _PyAsyncGen_MAXFREELIST > 0
|
|
static struct _Py_async_gen_state *
|
|
get_async_gen_state(void)
|
|
{
|
|
PyInterpreterState *interp = _PyInterpreterState_GET();
|
|
return &interp->async_gen;
|
|
}
|
|
#endif
|
|
|
|
|
|
PyObject *
|
|
PyAsyncGen_New(PyFrameObject *f, PyObject *name, PyObject *qualname)
|
|
{
|
|
PyAsyncGenObject *o;
|
|
o = (PyAsyncGenObject *)gen_new_with_qualname(
|
|
&PyAsyncGen_Type, f, name, qualname);
|
|
if (o == NULL) {
|
|
return NULL;
|
|
}
|
|
o->ag_origin_or_finalizer = NULL;
|
|
o->ag_closed = 0;
|
|
o->ag_hooks_inited = 0;
|
|
o->ag_running_async = 0;
|
|
return (PyObject*)o;
|
|
}
|
|
|
|
|
|
void
|
|
_PyAsyncGen_ClearFreeLists(PyInterpreterState *interp)
|
|
{
|
|
#if _PyAsyncGen_MAXFREELIST > 0
|
|
struct _Py_async_gen_state *state = &interp->async_gen;
|
|
|
|
while (state->value_numfree) {
|
|
_PyAsyncGenWrappedValue *o;
|
|
o = state->value_freelist[--state->value_numfree];
|
|
assert(_PyAsyncGenWrappedValue_CheckExact(o));
|
|
PyObject_GC_Del(o);
|
|
}
|
|
|
|
while (state->asend_numfree) {
|
|
PyAsyncGenASend *o;
|
|
o = state->asend_freelist[--state->asend_numfree];
|
|
assert(Py_IS_TYPE(o, &_PyAsyncGenASend_Type));
|
|
PyObject_GC_Del(o);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void
|
|
_PyAsyncGen_Fini(PyInterpreterState *interp)
|
|
{
|
|
_PyAsyncGen_ClearFreeLists(interp);
|
|
#if defined(Py_DEBUG) && _PyAsyncGen_MAXFREELIST > 0
|
|
struct _Py_async_gen_state *state = &interp->async_gen;
|
|
state->value_numfree = -1;
|
|
state->asend_numfree = -1;
|
|
#endif
|
|
}
|
|
|
|
|
|
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(PyAsyncGenASend *o)
|
|
{
|
|
_PyObject_GC_UNTRACK((PyObject *)o);
|
|
Py_CLEAR(o->ags_gen);
|
|
Py_CLEAR(o->ags_sendval);
|
|
#if _PyAsyncGen_MAXFREELIST > 0
|
|
struct _Py_async_gen_state *state = get_async_gen_state();
|
|
#ifdef Py_DEBUG
|
|
// async_gen_asend_dealloc() must not be called after _PyAsyncGen_Fini()
|
|
assert(state->asend_numfree != -1);
|
|
#endif
|
|
if (state->asend_numfree < _PyAsyncGen_MAXFREELIST) {
|
|
assert(PyAsyncGenASend_CheckExact(o));
|
|
state->asend_freelist[state->asend_numfree++] = o;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
PyObject_GC_Del(o);
|
|
}
|
|
}
|
|
|
|
static int
|
|
async_gen_asend_traverse(PyAsyncGenASend *o, visitproc visit, void *arg)
|
|
{
|
|
Py_VISIT(o->ags_gen);
|
|
Py_VISIT(o->ags_sendval);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
async_gen_asend_send(PyAsyncGenASend *o, PyObject *arg)
|
|
{
|
|
PyObject *result;
|
|
|
|
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) {
|
|
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;
|
|
result = gen_send((PyGenObject*)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(PyAsyncGenASend *o)
|
|
{
|
|
return async_gen_asend_send(o, NULL);
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
async_gen_asend_throw(PyAsyncGenASend *o, PyObject *const *args, Py_ssize_t nargs)
|
|
{
|
|
PyObject *result;
|
|
|
|
if (o->ags_state == AWAITABLE_STATE_CLOSED) {
|
|
PyErr_SetString(
|
|
PyExc_RuntimeError,
|
|
"cannot reuse already awaited __anext__()/asend()");
|
|
return NULL;
|
|
}
|
|
|
|
result = gen_throw((PyGenObject*)o->ags_gen, args, nargs);
|
|
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_close(PyAsyncGenASend *o, PyObject *args)
|
|
{
|
|
o->ags_state = AWAITABLE_STATE_CLOSED;
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
|
|
static PyMethodDef async_gen_asend_methods[] = {
|
|
{"send", (PyCFunction)async_gen_asend_send, METH_O, send_doc},
|
|
{"throw", _PyCFunction_CAST(async_gen_asend_throw), METH_FASTCALL, throw_doc},
|
|
{"close", (PyCFunction)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 */
|
|
(destructor)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 */
|
|
(traverseproc)async_gen_asend_traverse, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
0, /* tp_richcompare */
|
|
0, /* tp_weaklistoffset */
|
|
PyObject_SelfIter, /* tp_iter */
|
|
(iternextfunc)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 */
|
|
};
|
|
|
|
|
|
static PyObject *
|
|
async_gen_asend_new(PyAsyncGenObject *gen, PyObject *sendval)
|
|
{
|
|
PyAsyncGenASend *o;
|
|
#if _PyAsyncGen_MAXFREELIST > 0
|
|
struct _Py_async_gen_state *state = get_async_gen_state();
|
|
#ifdef Py_DEBUG
|
|
// async_gen_asend_new() must not be called after _PyAsyncGen_Fini()
|
|
assert(state->asend_numfree != -1);
|
|
#endif
|
|
if (state->asend_numfree) {
|
|
state->asend_numfree--;
|
|
o = state->asend_freelist[state->asend_numfree];
|
|
_Py_NewReference((PyObject *)o);
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
o = PyObject_GC_New(PyAsyncGenASend, &_PyAsyncGenASend_Type);
|
|
if (o == NULL) {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
o->ags_gen = (PyAsyncGenObject*)Py_NewRef(gen);
|
|
|
|
o->ags_sendval = Py_XNewRef(sendval);
|
|
|
|
o->ags_state = AWAITABLE_STATE_INIT;
|
|
|
|
_PyObject_GC_TRACK((PyObject*)o);
|
|
return (PyObject*)o;
|
|
}
|
|
|
|
|
|
/* ---------- Async Generator Value Wrapper ------------ */
|
|
|
|
|
|
static void
|
|
async_gen_wrapped_val_dealloc(_PyAsyncGenWrappedValue *o)
|
|
{
|
|
_PyObject_GC_UNTRACK((PyObject *)o);
|
|
Py_CLEAR(o->agw_val);
|
|
#if _PyAsyncGen_MAXFREELIST > 0
|
|
struct _Py_async_gen_state *state = get_async_gen_state();
|
|
#ifdef Py_DEBUG
|
|
// async_gen_wrapped_val_dealloc() must not be called after _PyAsyncGen_Fini()
|
|
assert(state->value_numfree != -1);
|
|
#endif
|
|
if (state->value_numfree < _PyAsyncGen_MAXFREELIST) {
|
|
assert(_PyAsyncGenWrappedValue_CheckExact(o));
|
|
state->value_freelist[state->value_numfree++] = o;
|
|
OBJECT_STAT_INC(to_freelist);
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
PyObject_GC_Del(o);
|
|
}
|
|
}
|
|
|
|
|
|
static int
|
|
async_gen_wrapped_val_traverse(_PyAsyncGenWrappedValue *o,
|
|
visitproc visit, void *arg)
|
|
{
|
|
Py_VISIT(o->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 */
|
|
(destructor)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 */
|
|
(traverseproc)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)
|
|
{
|
|
_PyAsyncGenWrappedValue *o;
|
|
assert(val);
|
|
|
|
#if _PyAsyncGen_MAXFREELIST > 0
|
|
struct _Py_async_gen_state *state = &tstate->interp->async_gen;
|
|
#ifdef Py_DEBUG
|
|
// _PyAsyncGenValueWrapperNew() must not be called after _PyAsyncGen_Fini()
|
|
assert(state->value_numfree != -1);
|
|
#endif
|
|
if (state->value_numfree) {
|
|
state->value_numfree--;
|
|
o = state->value_freelist[state->value_numfree];
|
|
OBJECT_STAT_INC(from_freelist);
|
|
assert(_PyAsyncGenWrappedValue_CheckExact(o));
|
|
_Py_NewReference((PyObject*)o);
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
o = PyObject_GC_New(_PyAsyncGenWrappedValue,
|
|
&_PyAsyncGenWrappedValue_Type);
|
|
if (o == NULL) {
|
|
return NULL;
|
|
}
|
|
}
|
|
o->agw_val = Py_NewRef(val);
|
|
_PyObject_GC_TRACK((PyObject*)o);
|
|
return (PyObject*)o;
|
|
}
|
|
|
|
|
|
/* ---------- Async Generator AThrow awaitable ------------ */
|
|
|
|
|
|
static void
|
|
async_gen_athrow_dealloc(PyAsyncGenAThrow *o)
|
|
{
|
|
_PyObject_GC_UNTRACK((PyObject *)o);
|
|
Py_CLEAR(o->agt_gen);
|
|
Py_CLEAR(o->agt_args);
|
|
PyObject_GC_Del(o);
|
|
}
|
|
|
|
|
|
static int
|
|
async_gen_athrow_traverse(PyAsyncGenAThrow *o, visitproc visit, void *arg)
|
|
{
|
|
Py_VISIT(o->agt_gen);
|
|
Py_VISIT(o->agt_args);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
async_gen_athrow_send(PyAsyncGenAThrow *o, PyObject *arg)
|
|
{
|
|
PyGenObject *gen = (PyGenObject*)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 (gen->gi_frame_state >= FRAME_COMPLETED) {
|
|
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_args == 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_args == 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 {
|
|
PyObject *typ;
|
|
PyObject *tb = NULL;
|
|
PyObject *val = NULL;
|
|
|
|
if (!PyArg_UnpackTuple(o->agt_args, "athrow", 1, 3,
|
|
&typ, &val, &tb)) {
|
|
return NULL;
|
|
}
|
|
|
|
retval = _gen_throw((PyGenObject *)gen,
|
|
0, /* Do not close generator when
|
|
PyExc_GeneratorExit is passed */
|
|
typ, val, 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((PyGenObject *)gen, arg);
|
|
if (o->agt_args) {
|
|
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_args == 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(PyAsyncGenAThrow *o, PyObject *const *args, Py_ssize_t nargs)
|
|
{
|
|
PyObject *retval;
|
|
|
|
if (o->agt_state == AWAITABLE_STATE_CLOSED) {
|
|
PyErr_SetString(
|
|
PyExc_RuntimeError,
|
|
"cannot reuse already awaited aclose()/athrow()");
|
|
return NULL;
|
|
}
|
|
|
|
retval = gen_throw((PyGenObject*)o->agt_gen, args, nargs);
|
|
if (o->agt_args) {
|
|
return async_gen_unwrap_value(o->agt_gen, 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 (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(PyAsyncGenAThrow *o)
|
|
{
|
|
return async_gen_athrow_send(o, Py_None);
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
async_gen_athrow_close(PyAsyncGenAThrow *o, PyObject *args)
|
|
{
|
|
o->agt_state = AWAITABLE_STATE_CLOSED;
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
|
|
static PyMethodDef async_gen_athrow_methods[] = {
|
|
{"send", (PyCFunction)async_gen_athrow_send, METH_O, send_doc},
|
|
{"throw", _PyCFunction_CAST(async_gen_athrow_throw),
|
|
METH_FASTCALL, throw_doc},
|
|
{"close", (PyCFunction)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 */
|
|
(destructor)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 */
|
|
(traverseproc)async_gen_athrow_traverse, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
0, /* tp_richcompare */
|
|
0, /* tp_weaklistoffset */
|
|
PyObject_SelfIter, /* tp_iter */
|
|
(iternextfunc)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 */
|
|
};
|
|
|
|
|
|
static PyObject *
|
|
async_gen_athrow_new(PyAsyncGenObject *gen, PyObject *args)
|
|
{
|
|
PyAsyncGenAThrow *o;
|
|
o = PyObject_GC_New(PyAsyncGenAThrow, &_PyAsyncGenAThrow_Type);
|
|
if (o == NULL) {
|
|
return NULL;
|
|
}
|
|
o->agt_gen = (PyAsyncGenObject*)Py_NewRef(gen);
|
|
o->agt_args = Py_XNewRef(args);
|
|
o->agt_state = AWAITABLE_STATE_INIT;
|
|
_PyObject_GC_TRACK((PyObject*)o);
|
|
return (PyObject*)o;
|
|
}
|