2080 lines
68 KiB
C
2080 lines
68 KiB
C
/* Generator object implementation */
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#include "Python.h"
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#include "frameobject.h"
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#include "structmember.h"
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#include "opcode.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 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 char *ASYNC_GEN_IGNORED_EXIT_MSG =
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"async generator ignored GeneratorExit";
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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((PyObject *)gen->gi_frame);
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Py_VISIT(gen->gi_code);
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Py_VISIT(gen->gi_name);
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Py_VISIT(gen->gi_qualname);
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return 0;
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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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PyObject *res = NULL;
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PyObject *error_type, *error_value, *error_traceback;
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if (gen->gi_frame == NULL || gen->gi_frame->f_stacktop == NULL)
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/* Generator isn't paused, so no need to close */
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return;
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if (PyAsyncGen_CheckExact(self)) {
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PyAsyncGenObject *agen = (PyAsyncGenObject*)self;
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PyObject *finalizer = agen->ag_finalizer;
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if (finalizer && !agen->ag_closed) {
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/* Save the current exception, if any. */
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PyErr_Fetch(&error_type, &error_value, &error_traceback);
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res = PyObject_CallFunctionObjArgs(finalizer, self, NULL);
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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_Restore(error_type, error_value, error_traceback);
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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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PyErr_Fetch(&error_type, &error_value, &error_traceback);
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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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if (gen->gi_code != NULL &&
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((PyCodeObject *)gen->gi_code)->co_flags & CO_COROUTINE &&
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gen->gi_frame->f_lasti == -1) {
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if (!error_value) {
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PyErr_WarnFormat(PyExc_RuntimeWarning, 1,
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"coroutine '%.50S' was never awaited",
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gen->gi_qualname);
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}
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}
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else {
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res = gen_close(gen, NULL);
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}
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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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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_Restore(error_type, error_value, error_traceback);
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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_finalizer);
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}
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if (gen->gi_frame != NULL) {
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gen->gi_frame->f_gen = NULL;
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Py_CLEAR(gen->gi_frame);
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}
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Py_CLEAR(gen->gi_code);
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Py_CLEAR(gen->gi_name);
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Py_CLEAR(gen->gi_qualname);
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PyObject_GC_Del(gen);
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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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PyThreadState *tstate = PyThreadState_GET();
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PyFrameObject *f = gen->gi_frame;
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PyObject *result;
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if (gen->gi_running) {
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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 NULL;
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}
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if (f == NULL || f->f_stacktop == NULL) {
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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 set exception if called from send(). */
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if (PyAsyncGen_CheckExact(gen)) {
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PyErr_SetNone(PyExc_StopAsyncIteration);
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}
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else {
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PyErr_SetNone(PyExc_StopIteration);
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}
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}
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return NULL;
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}
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if (f->f_lasti == -1) {
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if (arg && arg != Py_None) {
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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 NULL;
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}
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} else {
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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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Py_INCREF(result);
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*(f->f_stacktop++) = result;
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}
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/* Generators always return to their most recent caller, not
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* necessarily their creator. */
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Py_XINCREF(tstate->frame);
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assert(f->f_back == NULL);
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f->f_back = tstate->frame;
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gen->gi_running = 1;
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result = PyEval_EvalFrameEx(f, exc);
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gen->gi_running = 0;
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/* Don't keep the reference to f_back any longer than necessary. It
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* may keep a chain of frames alive or it could create a reference
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* cycle. */
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assert(f->f_back == tstate->frame);
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Py_CLEAR(f->f_back);
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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 && f->f_stacktop == NULL) {
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if (result == Py_None) {
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/* Delay exception instantiation if we can */
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if (PyAsyncGen_CheckExact(gen)) {
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PyErr_SetNone(PyExc_StopAsyncIteration);
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}
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else {
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PyErr_SetNone(PyExc_StopIteration);
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}
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}
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else {
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/* Async generators cannot return anything but None */
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assert(!PyAsyncGen_CheckExact(gen));
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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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else if (!result && PyErr_ExceptionMatches(PyExc_StopIteration)) {
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/* Check for __future__ generator_stop and conditionally turn
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* a leaking StopIteration into RuntimeError (with its cause
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* set appropriately). */
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const int check_stop_iter_error_flags = CO_FUTURE_GENERATOR_STOP |
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CO_COROUTINE |
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CO_ITERABLE_COROUTINE |
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CO_ASYNC_GENERATOR;
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if (gen->gi_code != NULL &&
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((PyCodeObject *)gen->gi_code)->co_flags &
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check_stop_iter_error_flags)
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{
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/* `gen` is either:
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* a generator with CO_FUTURE_GENERATOR_STOP flag;
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* a coroutine;
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* a generator with CO_ITERABLE_COROUTINE flag
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(decorated with types.coroutine decorator);
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* an async generator.
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*/
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const char *msg = "generator raised StopIteration";
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if (PyCoro_CheckExact(gen)) {
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msg = "coroutine raised StopIteration";
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}
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else if PyAsyncGen_CheckExact(gen) {
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msg = "async generator raised StopIteration";
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}
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_PyErr_FormatFromCause(PyExc_RuntimeError, "%s", msg);
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}
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else {
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/* `gen` is an ordinary generator without
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CO_FUTURE_GENERATOR_STOP flag.
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*/
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PyObject *exc, *val, *tb;
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/* Pop the exception before issuing a warning. */
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PyErr_Fetch(&exc, &val, &tb);
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if (PyErr_WarnFormat(PyExc_DeprecationWarning, 1,
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"generator '%.50S' raised StopIteration",
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gen->gi_qualname)) {
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/* Warning was converted to an error. */
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Py_XDECREF(exc);
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Py_XDECREF(val);
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Py_XDECREF(tb);
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}
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else {
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PyErr_Restore(exc, val, tb);
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}
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}
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}
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else if (PyAsyncGen_CheckExact(gen) && !result &&
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PyErr_ExceptionMatches(PyExc_StopAsyncIteration))
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{
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/* code in `gen` raised a StopAsyncIteration error:
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raise a RuntimeError.
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*/
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const char *msg = "async generator raised StopAsyncIteration";
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_PyErr_FormatFromCause(PyExc_RuntimeError, "%s", msg);
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}
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if (!result || f->f_stacktop == NULL) {
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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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PyObject *t, *v, *tb;
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t = f->f_exc_type;
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v = f->f_exc_value;
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tb = f->f_exc_traceback;
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f->f_exc_type = NULL;
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f->f_exc_value = NULL;
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f->f_exc_traceback = NULL;
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Py_XDECREF(t);
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Py_XDECREF(v);
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Py_XDECREF(tb);
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gen->gi_frame->f_gen = NULL;
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gen->gi_frame = NULL;
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Py_DECREF(f);
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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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PyObject *
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_PyGen_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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_Py_IDENTIFIER(close);
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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 = _PyObject_GetAttrId(yf, &PyId_close);
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if (meth == NULL) {
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if (!PyErr_ExceptionMatches(PyExc_AttributeError))
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PyErr_WriteUnraisable(yf);
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PyErr_Clear();
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}
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else {
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retval = _PyObject_CallNoArg(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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PyFrameObject *f = gen->gi_frame;
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|
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if (f && f->f_stacktop) {
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PyObject *bytecode = f->f_code->co_code;
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unsigned char *code = (unsigned char *)PyBytes_AS_STRING(bytecode);
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|
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if (f->f_lasti < 0) {
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/* Return immediately if the frame didn't start yet. YIELD_FROM
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always come after LOAD_CONST: a code object should not start
|
|
with YIELD_FROM */
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assert(code[0] != YIELD_FROM);
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return NULL;
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}
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|
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if (code[f->f_lasti + sizeof(_Py_CODEUNIT)] != YIELD_FROM)
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|
return NULL;
|
|
yf = f->f_stacktop[-1];
|
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Py_INCREF(yf);
|
|
}
|
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|
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return yf;
|
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}
|
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|
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static PyObject *
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gen_close(PyGenObject *gen, PyObject *args)
|
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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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|
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if (yf) {
|
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gen->gi_running = 1;
|
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err = gen_close_iter(yf);
|
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gen->gi_running = 0;
|
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Py_DECREF(yf);
|
|
}
|
|
if (err == 0)
|
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PyErr_SetNone(PyExc_GeneratorExit);
|
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retval = gen_send_ex(gen, Py_None, 1, 1);
|
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if (retval) {
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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);
|
|
return NULL;
|
|
}
|
|
if (PyErr_ExceptionMatches(PyExc_StopIteration)
|
|
|| PyErr_ExceptionMatches(PyExc_GeneratorExit)) {
|
|
PyErr_Clear(); /* ignore these errors */
|
|
Py_RETURN_NONE;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
|
|
PyDoc_STRVAR(throw_doc,
|
|
"throw(typ[,val[,tb]]) -> raise exception in generator,\n\
|
|
return next yielded value or raise StopIteration.");
|
|
|
|
static PyObject *
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_gen_throw(PyGenObject *gen, int close_on_genexit,
|
|
PyObject *typ, PyObject *val, PyObject *tb)
|
|
{
|
|
PyObject *yf = _PyGen_yf(gen);
|
|
_Py_IDENTIFIER(throw);
|
|
|
|
if (yf) {
|
|
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.
|
|
*/
|
|
gen->gi_running = 1;
|
|
err = gen_close_iter(yf);
|
|
gen->gi_running = 0;
|
|
Py_DECREF(yf);
|
|
if (err < 0)
|
|
return gen_send_ex(gen, Py_None, 1, 0);
|
|
goto throw_here;
|
|
}
|
|
if (PyGen_CheckExact(yf) || PyCoro_CheckExact(yf)) {
|
|
/* `yf` is a generator or a coroutine. */
|
|
gen->gi_running = 1;
|
|
/* Close the generator that we are currently iterating with
|
|
'yield from' or awaiting on with 'await'. */
|
|
ret = _gen_throw((PyGenObject *)yf, close_on_genexit,
|
|
typ, val, tb);
|
|
gen->gi_running = 0;
|
|
} else {
|
|
/* `yf` is an iterator or a coroutine-like object. */
|
|
PyObject *meth = _PyObject_GetAttrId(yf, &PyId_throw);
|
|
if (meth == NULL) {
|
|
if (!PyErr_ExceptionMatches(PyExc_AttributeError)) {
|
|
Py_DECREF(yf);
|
|
return NULL;
|
|
}
|
|
PyErr_Clear();
|
|
Py_DECREF(yf);
|
|
goto throw_here;
|
|
}
|
|
gen->gi_running = 1;
|
|
ret = PyObject_CallFunctionObjArgs(meth, typ, val, tb, NULL);
|
|
gen->gi_running = 0;
|
|
Py_DECREF(meth);
|
|
}
|
|
Py_DECREF(yf);
|
|
if (!ret) {
|
|
PyObject *val;
|
|
/* Pop subiterator from stack */
|
|
ret = *(--gen->gi_frame->f_stacktop);
|
|
assert(ret == yf);
|
|
Py_DECREF(ret);
|
|
/* Termination repetition of YIELD_FROM */
|
|
assert(gen->gi_frame->f_lasti >= 0);
|
|
gen->gi_frame->f_lasti += sizeof(_Py_CODEUNIT);
|
|
if (_PyGen_FetchStopIterationValue(&val) == 0) {
|
|
ret = gen_send_ex(gen, val, 0, 0);
|
|
Py_DECREF(val);
|
|
} else {
|
|
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_XDECREF(val);
|
|
val = typ;
|
|
typ = PyExceptionInstance_Class(typ);
|
|
Py_INCREF(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 *args)
|
|
{
|
|
PyObject *typ;
|
|
PyObject *tb = NULL;
|
|
PyObject *val = NULL;
|
|
|
|
if (!PyArg_UnpackTuple(args, "throw", 1, 3, &typ, &val, &tb)) {
|
|
return NULL;
|
|
}
|
|
|
|
return _gen_throw(gen, 1, typ, val, tb);
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
gen_iternext(PyGenObject *gen)
|
|
{
|
|
return gen_send_ex(gen, NULL, 0, 0);
|
|
}
|
|
|
|
/*
|
|
* 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) &&
|
|
!PyObject_TypeCheck(value, (PyTypeObject *) PyExc_StopIteration)))
|
|
{
|
|
/* Delay exception instantiation if we can */
|
|
PyErr_SetObject(PyExc_StopIteration, value);
|
|
return 0;
|
|
}
|
|
/* Construct an exception instance manually with
|
|
* PyObject_CallFunctionObjArgs 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_CallFunctionObjArgs(PyExc_StopIteration, value, NULL);
|
|
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 *et, *ev, *tb;
|
|
PyObject *value = NULL;
|
|
|
|
if (PyErr_ExceptionMatches(PyExc_StopIteration)) {
|
|
PyErr_Fetch(&et, &ev, &tb);
|
|
if (ev) {
|
|
/* exception will usually be normalised already */
|
|
if (PyObject_TypeCheck(ev, (PyTypeObject *) et)) {
|
|
value = ((PyStopIterationObject *)ev)->value;
|
|
Py_INCREF(value);
|
|
Py_DECREF(ev);
|
|
} else if (et == PyExc_StopIteration && !PyTuple_Check(ev)) {
|
|
/* Avoid normalisation and take ev as value.
|
|
*
|
|
* Normalization is required if the value is a tuple, in
|
|
* that case the value of StopIteration would be set to
|
|
* the first element of the tuple.
|
|
*
|
|
* (See _PyErr_CreateException code for details.)
|
|
*/
|
|
value = ev;
|
|
} else {
|
|
/* normalisation required */
|
|
PyErr_NormalizeException(&et, &ev, &tb);
|
|
if (!PyObject_TypeCheck(ev, (PyTypeObject *)PyExc_StopIteration)) {
|
|
PyErr_Restore(et, ev, tb);
|
|
return -1;
|
|
}
|
|
value = ((PyStopIterationObject *)ev)->value;
|
|
Py_INCREF(value);
|
|
Py_DECREF(ev);
|
|
}
|
|
}
|
|
Py_XDECREF(et);
|
|
Py_XDECREF(tb);
|
|
} else if (PyErr_Occurred()) {
|
|
return -1;
|
|
}
|
|
if (value == NULL) {
|
|
value = Py_None;
|
|
Py_INCREF(value);
|
|
}
|
|
*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)
|
|
{
|
|
Py_INCREF(op->gi_name);
|
|
return op->gi_name;
|
|
}
|
|
|
|
static int
|
|
gen_set_name(PyGenObject *op, PyObject *value)
|
|
{
|
|
/* 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_INCREF(value);
|
|
Py_XSETREF(op->gi_name, value);
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
gen_get_qualname(PyGenObject *op)
|
|
{
|
|
Py_INCREF(op->gi_qualname);
|
|
return op->gi_qualname;
|
|
}
|
|
|
|
static int
|
|
gen_set_qualname(PyGenObject *op, PyObject *value)
|
|
{
|
|
/* 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_INCREF(value);
|
|
Py_XSETREF(op->gi_qualname, value);
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
gen_getyieldfrom(PyGenObject *gen)
|
|
{
|
|
PyObject *yf = _PyGen_yf(gen);
|
|
if (yf == NULL)
|
|
Py_RETURN_NONE;
|
|
return yf;
|
|
}
|
|
|
|
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")},
|
|
{NULL} /* Sentinel */
|
|
};
|
|
|
|
static PyMemberDef gen_memberlist[] = {
|
|
{"gi_frame", T_OBJECT, offsetof(PyGenObject, gi_frame), READONLY},
|
|
{"gi_running", T_BOOL, offsetof(PyGenObject, gi_running), READONLY},
|
|
{"gi_code", T_OBJECT, offsetof(PyGenObject, gi_code), READONLY},
|
|
{NULL} /* Sentinel */
|
|
};
|
|
|
|
static PyMethodDef gen_methods[] = {
|
|
{"send",(PyCFunction)_PyGen_Send, METH_O, send_doc},
|
|
{"throw",(PyCFunction)gen_throw, METH_VARARGS, throw_doc},
|
|
{"close",(PyCFunction)gen_close, METH_NOARGS, close_doc},
|
|
{NULL, NULL} /* Sentinel */
|
|
};
|
|
|
|
PyTypeObject PyGen_Type = {
|
|
PyVarObject_HEAD_INIT(&PyType_Type, 0)
|
|
"generator", /* tp_name */
|
|
sizeof(PyGenObject), /* tp_basicsize */
|
|
0, /* tp_itemsize */
|
|
/* methods */
|
|
(destructor)gen_dealloc, /* tp_dealloc */
|
|
0, /* tp_print */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
0, /* 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 |
|
|
Py_TPFLAGS_HAVE_FINALIZE, /* 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 *
|
|
gen_new_with_qualname(PyTypeObject *type, PyFrameObject *f,
|
|
PyObject *name, PyObject *qualname)
|
|
{
|
|
PyGenObject *gen = PyObject_GC_New(PyGenObject, type);
|
|
if (gen == NULL) {
|
|
Py_DECREF(f);
|
|
return NULL;
|
|
}
|
|
gen->gi_frame = f;
|
|
f->f_gen = (PyObject *) gen;
|
|
Py_INCREF(f->f_code);
|
|
gen->gi_code = (PyObject *)(f->f_code);
|
|
gen->gi_running = 0;
|
|
gen->gi_weakreflist = NULL;
|
|
if (name != NULL)
|
|
gen->gi_name = name;
|
|
else
|
|
gen->gi_name = ((PyCodeObject *)gen->gi_code)->co_name;
|
|
Py_INCREF(gen->gi_name);
|
|
if (qualname != NULL)
|
|
gen->gi_qualname = qualname;
|
|
else
|
|
gen->gi_qualname = gen->gi_name;
|
|
Py_INCREF(gen->gi_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);
|
|
}
|
|
|
|
int
|
|
PyGen_NeedsFinalizing(PyGenObject *gen)
|
|
{
|
|
int i;
|
|
PyFrameObject *f = gen->gi_frame;
|
|
|
|
if (f == NULL || f->f_stacktop == NULL)
|
|
return 0; /* no frame or empty blockstack == no finalization */
|
|
|
|
/* Any block type besides a loop requires cleanup. */
|
|
for (i = 0; i < f->f_iblock; i++)
|
|
if (f->f_blockstack[i].b_type != SETUP_LOOP)
|
|
return 1;
|
|
|
|
/* No blocks except loops, it's safe to skip finalization. */
|
|
return 0;
|
|
}
|
|
|
|
/* Coroutine Object */
|
|
|
|
typedef struct {
|
|
PyObject_HEAD
|
|
PyCoroObject *cw_coroutine;
|
|
} PyCoroWrapper;
|
|
|
|
static int
|
|
gen_is_coroutine(PyObject *o)
|
|
{
|
|
if (PyGen_CheckExact(o)) {
|
|
PyCodeObject *code = (PyCodeObject *)((PyGenObject*)o)->gi_code;
|
|
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. */
|
|
Py_INCREF(o);
|
|
return 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;
|
|
}
|
|
Py_INCREF(coro);
|
|
cw->cw_coroutine = coro;
|
|
_PyObject_GC_TRACK(cw);
|
|
return (PyObject *)cw;
|
|
}
|
|
|
|
static PyObject *
|
|
coro_get_cr_await(PyCoroObject *coro)
|
|
{
|
|
PyObject *yf = _PyGen_yf((PyGenObject *) coro);
|
|
if (yf == NULL)
|
|
Py_RETURN_NONE;
|
|
return yf;
|
|
}
|
|
|
|
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")},
|
|
{NULL} /* Sentinel */
|
|
};
|
|
|
|
static PyMemberDef coro_memberlist[] = {
|
|
{"cr_frame", T_OBJECT, offsetof(PyCoroObject, cr_frame), READONLY},
|
|
{"cr_running", T_BOOL, offsetof(PyCoroObject, cr_running), READONLY},
|
|
{"cr_code", T_OBJECT, offsetof(PyCoroObject, cr_code), 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(typ[,val[,tb]]) -> raise exception in coroutine,\n\
|
|
return next iterated value or raise StopIteration.");
|
|
|
|
PyDoc_STRVAR(coro_close_doc,
|
|
"close() -> raise GeneratorExit inside coroutine.");
|
|
|
|
static PyMethodDef coro_methods[] = {
|
|
{"send",(PyCFunction)_PyGen_Send, METH_O, coro_send_doc},
|
|
{"throw",(PyCFunction)gen_throw, METH_VARARGS, coro_throw_doc},
|
|
{"close",(PyCFunction)gen_close, METH_NOARGS, coro_close_doc},
|
|
{NULL, NULL} /* Sentinel */
|
|
};
|
|
|
|
static PyAsyncMethods coro_as_async = {
|
|
(unaryfunc)coro_await, /* am_await */
|
|
0, /* am_aiter */
|
|
0 /* am_anext */
|
|
};
|
|
|
|
PyTypeObject PyCoro_Type = {
|
|
PyVarObject_HEAD_INIT(&PyType_Type, 0)
|
|
"coroutine", /* tp_name */
|
|
sizeof(PyCoroObject), /* tp_basicsize */
|
|
0, /* tp_itemsize */
|
|
/* methods */
|
|
(destructor)gen_dealloc, /* tp_dealloc */
|
|
0, /* tp_print */
|
|
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 |
|
|
Py_TPFLAGS_HAVE_FINALIZE, /* 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_send_ex((PyGenObject *)cw->cw_coroutine, NULL, 0, 0);
|
|
}
|
|
|
|
static PyObject *
|
|
coro_wrapper_send(PyCoroWrapper *cw, PyObject *arg)
|
|
{
|
|
return gen_send_ex((PyGenObject *)cw->cw_coroutine, arg, 0, 0);
|
|
}
|
|
|
|
static PyObject *
|
|
coro_wrapper_throw(PyCoroWrapper *cw, PyObject *args)
|
|
{
|
|
return gen_throw((PyGenObject *)cw->cw_coroutine, args);
|
|
}
|
|
|
|
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)coro_wrapper_throw, METH_VARARGS, 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_print */
|
|
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 */
|
|
};
|
|
|
|
PyObject *
|
|
PyCoro_New(PyFrameObject *f, PyObject *name, PyObject *qualname)
|
|
{
|
|
return gen_new_with_qualname(&PyCoro_Type, f, name, qualname);
|
|
}
|
|
|
|
|
|
/* __aiter__ wrapper; see http://bugs.python.org/issue27243 for details. */
|
|
|
|
typedef struct {
|
|
PyObject_HEAD
|
|
PyObject *ags_aiter;
|
|
} PyAIterWrapper;
|
|
|
|
|
|
static PyObject *
|
|
aiter_wrapper_iternext(PyAIterWrapper *aw)
|
|
{
|
|
_PyGen_SetStopIterationValue(aw->ags_aiter);
|
|
return NULL;
|
|
}
|
|
|
|
static int
|
|
aiter_wrapper_traverse(PyAIterWrapper *aw, visitproc visit, void *arg)
|
|
{
|
|
Py_VISIT((PyObject *)aw->ags_aiter);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
aiter_wrapper_dealloc(PyAIterWrapper *aw)
|
|
{
|
|
_PyObject_GC_UNTRACK((PyObject *)aw);
|
|
Py_CLEAR(aw->ags_aiter);
|
|
PyObject_GC_Del(aw);
|
|
}
|
|
|
|
static PyAsyncMethods aiter_wrapper_as_async = {
|
|
PyObject_SelfIter, /* am_await */
|
|
0, /* am_aiter */
|
|
0 /* am_anext */
|
|
};
|
|
|
|
PyTypeObject _PyAIterWrapper_Type = {
|
|
PyVarObject_HEAD_INIT(&PyType_Type, 0)
|
|
"aiter_wrapper",
|
|
sizeof(PyAIterWrapper), /* tp_basicsize */
|
|
0, /* tp_itemsize */
|
|
(destructor)aiter_wrapper_dealloc, /* destructor tp_dealloc */
|
|
0, /* tp_print */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
&aiter_wrapper_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 */
|
|
"A wrapper object for __aiter__ bakwards compatibility.",
|
|
(traverseproc)aiter_wrapper_traverse, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
0, /* tp_richcompare */
|
|
0, /* tp_weaklistoffset */
|
|
PyObject_SelfIter, /* tp_iter */
|
|
(iternextfunc)aiter_wrapper_iternext, /* 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 */
|
|
0, /* tp_free */
|
|
};
|
|
|
|
|
|
PyObject *
|
|
_PyAIterWrapper_New(PyObject *aiter)
|
|
{
|
|
PyAIterWrapper *aw = PyObject_GC_New(PyAIterWrapper,
|
|
&_PyAIterWrapper_Type);
|
|
if (aw == NULL) {
|
|
return NULL;
|
|
}
|
|
Py_INCREF(aiter);
|
|
aw->ags_aiter = aiter;
|
|
_PyObject_GC_TRACK(aw);
|
|
return (PyObject *)aw;
|
|
}
|
|
|
|
|
|
/* ========= 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 {
|
|
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 {
|
|
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 {
|
|
PyObject_HEAD
|
|
PyObject *agw_val;
|
|
} _PyAsyncGenWrappedValue;
|
|
|
|
|
|
#ifndef _PyAsyncGen_MAXFREELIST
|
|
#define _PyAsyncGen_MAXFREELIST 80
|
|
#endif
|
|
|
|
/* Freelists boost performance 6-10%; they also reduce memory
|
|
fragmentation, as _PyAsyncGenWrappedValue and PyAsyncGenASend
|
|
are short-living objects that are instantiated for every
|
|
__anext__ call.
|
|
*/
|
|
|
|
static _PyAsyncGenWrappedValue *ag_value_freelist[_PyAsyncGen_MAXFREELIST];
|
|
static int ag_value_freelist_free = 0;
|
|
|
|
static PyAsyncGenASend *ag_asend_freelist[_PyAsyncGen_MAXFREELIST];
|
|
static int ag_asend_freelist_free = 0;
|
|
|
|
#define _PyAsyncGenWrappedValue_CheckExact(o) \
|
|
(Py_TYPE(o) == &_PyAsyncGenWrappedValue_Type)
|
|
|
|
#define PyAsyncGenASend_CheckExact(o) \
|
|
(Py_TYPE(o) == &_PyAsyncGenASend_Type)
|
|
|
|
|
|
static int
|
|
async_gen_traverse(PyAsyncGenObject *gen, visitproc visit, void *arg)
|
|
{
|
|
Py_VISIT(gen->ag_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) {
|
|
Py_INCREF(finalizer);
|
|
o->ag_finalizer = finalizer;
|
|
}
|
|
|
|
firstiter = tstate->async_gen_firstiter;
|
|
if (firstiter) {
|
|
PyObject *res;
|
|
|
|
Py_INCREF(firstiter);
|
|
res = PyObject_CallFunctionObjArgs(firstiter, o, NULL);
|
|
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 (async_gen_init_hooks(o)) {
|
|
return NULL;
|
|
}
|
|
return async_gen_athrow_new(o, args);
|
|
}
|
|
|
|
|
|
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")},
|
|
{NULL} /* Sentinel */
|
|
};
|
|
|
|
static PyMemberDef async_gen_memberlist[] = {
|
|
{"ag_frame", T_OBJECT, offsetof(PyAsyncGenObject, ag_frame), READONLY},
|
|
{"ag_running", T_BOOL, offsetof(PyAsyncGenObject, ag_running), READONLY},
|
|
{"ag_code", T_OBJECT, offsetof(PyAsyncGenObject, ag_code), 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(typ[,val[,tb]]) -> raise exception in generator.");
|
|
|
|
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},
|
|
{NULL, NULL} /* Sentinel */
|
|
};
|
|
|
|
|
|
static PyAsyncMethods async_gen_as_async = {
|
|
0, /* am_await */
|
|
PyObject_SelfIter, /* am_aiter */
|
|
(unaryfunc)async_gen_anext /* am_anext */
|
|
};
|
|
|
|
|
|
PyTypeObject PyAsyncGen_Type = {
|
|
PyVarObject_HEAD_INIT(&PyType_Type, 0)
|
|
"async_generator", /* tp_name */
|
|
sizeof(PyAsyncGenObject), /* tp_basicsize */
|
|
0, /* tp_itemsize */
|
|
/* methods */
|
|
(destructor)gen_dealloc, /* tp_dealloc */
|
|
0, /* tp_print */
|
|
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 |
|
|
Py_TPFLAGS_HAVE_FINALIZE, /* 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 */
|
|
};
|
|
|
|
|
|
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_finalizer = NULL;
|
|
o->ag_closed = 0;
|
|
o->ag_hooks_inited = 0;
|
|
return (PyObject*)o;
|
|
}
|
|
|
|
|
|
int
|
|
PyAsyncGen_ClearFreeLists(void)
|
|
{
|
|
int ret = ag_value_freelist_free + ag_asend_freelist_free;
|
|
|
|
while (ag_value_freelist_free) {
|
|
_PyAsyncGenWrappedValue *o;
|
|
o = ag_value_freelist[--ag_value_freelist_free];
|
|
assert(_PyAsyncGenWrappedValue_CheckExact(o));
|
|
PyObject_GC_Del(o);
|
|
}
|
|
|
|
while (ag_asend_freelist_free) {
|
|
PyAsyncGenASend *o;
|
|
o = ag_asend_freelist[--ag_asend_freelist_free];
|
|
assert(Py_TYPE(o) == &_PyAsyncGenASend_Type);
|
|
PyObject_GC_Del(o);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
void
|
|
PyAsyncGen_Fini(void)
|
|
{
|
|
PyAsyncGen_ClearFreeLists();
|
|
}
|
|
|
|
|
|
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;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
if (_PyAsyncGenWrappedValue_CheckExact(result)) {
|
|
/* async yield */
|
|
_PyGen_SetStopIterationValue(((_PyAsyncGenWrappedValue*)result)->agw_val);
|
|
Py_DECREF(result);
|
|
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 (ag_asend_freelist_free < _PyAsyncGen_MAXFREELIST) {
|
|
assert(PyAsyncGenASend_CheckExact(o));
|
|
ag_asend_freelist[ag_asend_freelist_free++] = o;
|
|
} else {
|
|
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_SetNone(PyExc_StopIteration);
|
|
return NULL;
|
|
}
|
|
|
|
if (o->ags_state == AWAITABLE_STATE_INIT) {
|
|
if (arg == NULL || arg == Py_None) {
|
|
arg = o->ags_sendval;
|
|
}
|
|
o->ags_state = AWAITABLE_STATE_ITER;
|
|
}
|
|
|
|
result = gen_send_ex((PyGenObject*)o->ags_gen, arg, 0, 0);
|
|
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 *args)
|
|
{
|
|
PyObject *result;
|
|
|
|
if (o->ags_state == AWAITABLE_STATE_CLOSED) {
|
|
PyErr_SetNone(PyExc_StopIteration);
|
|
return NULL;
|
|
}
|
|
|
|
result = gen_throw((PyGenObject*)o->ags_gen, args);
|
|
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)async_gen_asend_throw, METH_VARARGS, 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 */
|
|
};
|
|
|
|
|
|
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_print */
|
|
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 (ag_asend_freelist_free) {
|
|
ag_asend_freelist_free--;
|
|
o = ag_asend_freelist[ag_asend_freelist_free];
|
|
_Py_NewReference((PyObject *)o);
|
|
} else {
|
|
o = PyObject_GC_New(PyAsyncGenASend, &_PyAsyncGenASend_Type);
|
|
if (o == NULL) {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
Py_INCREF(gen);
|
|
o->ags_gen = gen;
|
|
|
|
Py_XINCREF(sendval);
|
|
o->ags_sendval = 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 (ag_value_freelist_free < _PyAsyncGen_MAXFREELIST) {
|
|
assert(_PyAsyncGenWrappedValue_CheckExact(o));
|
|
ag_value_freelist[ag_value_freelist_free++] = o;
|
|
} else {
|
|
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_print */
|
|
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(PyObject *val)
|
|
{
|
|
_PyAsyncGenWrappedValue *o;
|
|
assert(val);
|
|
|
|
if (ag_value_freelist_free) {
|
|
ag_value_freelist_free--;
|
|
o = ag_value_freelist[ag_value_freelist_free];
|
|
assert(_PyAsyncGenWrappedValue_CheckExact(o));
|
|
_Py_NewReference((PyObject*)o);
|
|
} else {
|
|
o = PyObject_GC_New(_PyAsyncGenWrappedValue,
|
|
&_PyAsyncGenWrappedValue_Type);
|
|
if (o == NULL) {
|
|
return NULL;
|
|
}
|
|
}
|
|
o->agw_val = val;
|
|
Py_INCREF(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;
|
|
PyFrameObject *f = gen->gi_frame;
|
|
PyObject *retval;
|
|
|
|
if (f == NULL || f->f_stacktop == NULL ||
|
|
o->agt_state == AWAITABLE_STATE_CLOSED) {
|
|
PyErr_SetNone(PyExc_StopIteration);
|
|
return NULL;
|
|
}
|
|
|
|
if (o->agt_state == AWAITABLE_STATE_INIT) {
|
|
if (o->agt_gen->ag_closed) {
|
|
PyErr_SetNone(PyExc_StopIteration);
|
|
return NULL;
|
|
}
|
|
|
|
if (arg != Py_None) {
|
|
PyErr_SetString(PyExc_RuntimeError, NON_INIT_CORO_MSG);
|
|
return NULL;
|
|
}
|
|
|
|
o->agt_state = AWAITABLE_STATE_ITER;
|
|
|
|
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_ex((PyGenObject *)gen, arg, 0, 0);
|
|
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:
|
|
PyErr_SetString(
|
|
PyExc_RuntimeError, ASYNC_GEN_IGNORED_EXIT_MSG);
|
|
return NULL;
|
|
|
|
check_error:
|
|
if (PyErr_ExceptionMatches(PyExc_StopAsyncIteration)) {
|
|
o->agt_state = AWAITABLE_STATE_CLOSED;
|
|
if (o->agt_args == NULL) {
|
|
/* when aclose() is called we don't want to propagate
|
|
StopAsyncIteration; just raise StopIteration, signalling
|
|
that 'aclose()' is done. */
|
|
PyErr_Clear();
|
|
PyErr_SetNone(PyExc_StopIteration);
|
|
}
|
|
}
|
|
else if (PyErr_ExceptionMatches(PyExc_GeneratorExit)) {
|
|
o->agt_state = AWAITABLE_STATE_CLOSED;
|
|
PyErr_Clear(); /* ignore these errors */
|
|
PyErr_SetNone(PyExc_StopIteration);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
async_gen_athrow_throw(PyAsyncGenAThrow *o, PyObject *args)
|
|
{
|
|
PyObject *retval;
|
|
|
|
if (o->agt_state == AWAITABLE_STATE_INIT) {
|
|
PyErr_SetString(PyExc_RuntimeError, NON_INIT_CORO_MSG);
|
|
return NULL;
|
|
}
|
|
|
|
if (o->agt_state == AWAITABLE_STATE_CLOSED) {
|
|
PyErr_SetNone(PyExc_StopIteration);
|
|
return NULL;
|
|
}
|
|
|
|
retval = gen_throw((PyGenObject*)o->agt_gen, args);
|
|
if (o->agt_args) {
|
|
return async_gen_unwrap_value(o->agt_gen, retval);
|
|
} else {
|
|
/* aclose() mode */
|
|
if (retval && _PyAsyncGenWrappedValue_CheckExact(retval)) {
|
|
Py_DECREF(retval);
|
|
PyErr_SetString(PyExc_RuntimeError, ASYNC_GEN_IGNORED_EXIT_MSG);
|
|
return NULL;
|
|
}
|
|
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)async_gen_athrow_throw, METH_VARARGS, 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 */
|
|
};
|
|
|
|
|
|
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_print */
|
|
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 = gen;
|
|
o->agt_args = args;
|
|
o->agt_state = AWAITABLE_STATE_INIT;
|
|
Py_INCREF(gen);
|
|
Py_XINCREF(args);
|
|
_PyObject_GC_TRACK((PyObject*)o);
|
|
return (PyObject*)o;
|
|
}
|