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Issue #28544: Implement asyncio.Task in C. 

This implementation provides additional 10-20% speed boost for
asyncio programs.

The patch also fixes _asynciomodule.c to use Arguments Clinic, and
makes '_schedule_callbacks' an overridable method (as it was in 3.5).
This commit is contained in:
Yury Selivanov 2016-10-28 12:52:37 -04:00
parent bbcb79920b
commit a0c1ba608e
10 changed files with 2717 additions and 557 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Lib/asyncio/base_events.py
View File

@ -57,7 +57,7 @@ _FATAL_ERROR_IGNORE = (BrokenPipeError,
def _format_handle(handle):
cb = handle._callback
if inspect.ismethod(cb) and isinstance(cb.__self__, tasks.Task):
if isinstance(getattr(cb, '__self__', None), tasks.Task):
# format the task
return repr(cb.__self__)
else:

70
Lib/asyncio/base_futures.py Normal file
View File

@ -0,0 +1,70 @@
__all__ = []
import concurrent.futures._base
import reprlib
from . import events
Error = concurrent.futures._base.Error
CancelledError = concurrent.futures.CancelledError
TimeoutError = concurrent.futures.TimeoutError
class InvalidStateError(Error):
"""The operation is not allowed in this state."""
# States for Future.
_PENDING = 'PENDING'
_CANCELLED = 'CANCELLED'
_FINISHED = 'FINISHED'
def isfuture(obj):
"""Check for a Future.
This returns True when obj is a Future instance or is advertising
itself as duck-type compatible by setting _asyncio_future_blocking.
See comment in Future for more details.
"""
return getattr(obj, '_asyncio_future_blocking', None) is not None
def _format_callbacks(cb):
"""helper function for Future.__repr__"""
size = len(cb)
if not size:
cb = ''
def format_cb(callback):
return events._format_callback_source(callback, ())
if size == 1:
cb = format_cb(cb[0])
elif size == 2:
cb = '{}, {}'.format(format_cb(cb[0]), format_cb(cb[1]))
elif size > 2:
cb = '{}, <{} more>, {}'.format(format_cb(cb[0]),
size - 2,
format_cb(cb[-1]))
return 'cb=[%s]' % cb
def _future_repr_info(future):
# (Future) -> str
"""helper function for Future.__repr__"""
info = [future._state.lower()]
if future._state == _FINISHED:
if future._exception is not None:
info.append('exception={!r}'.format(future._exception))
else:
# use reprlib to limit the length of the output, especially
# for very long strings
result = reprlib.repr(future._result)
info.append('result={}'.format(result))
if future._callbacks:
info.append(_format_callbacks(future._callbacks))
if future._source_traceback:
frame = future._source_traceback[-1]
info.append('created at %s:%s' % (frame[0], frame[1]))
return info

76
Lib/asyncio/base_tasks.py Normal file
View File

@ -0,0 +1,76 @@
import linecache
import traceback
from . import base_futures
from . import coroutines
def _task_repr_info(task):
info = base_futures._future_repr_info(task)
if task._must_cancel:
# replace status
info[0] = 'cancelling'
coro = coroutines._format_coroutine(task._coro)
info.insert(1, 'coro=<%s>' % coro)
if task._fut_waiter is not None:
info.insert(2, 'wait_for=%r' % task._fut_waiter)
return info
def _task_get_stack(task, limit):
frames = []
try:
# 'async def' coroutines
f = task._coro.cr_frame
except AttributeError:
f = task._coro.gi_frame
if f is not None:
while f is not None:
if limit is not None:
if limit <= 0:
break
limit -= 1
frames.append(f)
f = f.f_back
frames.reverse()
elif task._exception is not None:
tb = task._exception.__traceback__
while tb is not None:
if limit is not None:
if limit <= 0:
break
limit -= 1
frames.append(tb.tb_frame)
tb = tb.tb_next
return frames
def _task_print_stack(task, limit, file):
extracted_list = []
checked = set()
for f in task.get_stack(limit=limit):
lineno = f.f_lineno
co = f.f_code
filename = co.co_filename
name = co.co_name
if filename not in checked:
checked.add(filename)
linecache.checkcache(filename)
line = linecache.getline(filename, lineno, f.f_globals)
extracted_list.append((filename, lineno, name, line))
exc = task._exception
if not extracted_list:
print('No stack for %r' % task, file=file)
elif exc is not None:
print('Traceback for %r (most recent call last):' % task,
file=file)
else:
print('Stack for %r (most recent call last):' % task,
file=file)
traceback.print_list(extracted_list, file=file)
if exc is not None:
for line in traceback.format_exception_only(exc.__class__, exc):
print(line, file=file, end='')

4
Lib/asyncio/coroutines.py
View File

@ -11,7 +11,7 @@ import types
from . import compat
from . import events
from . import futures
from . import base_futures
from .log import logger
@ -204,7 +204,7 @@ def coroutine(func):
@functools.wraps(func)
def coro(*args, **kw):
res = func(*args, **kw)
if (futures.isfuture(res) or inspect.isgenerator(res) or
if (base_futures.isfuture(res) or inspect.isgenerator(res) or
isinstance(res, CoroWrapper)):
res = yield from res
elif _AwaitableABC is not None:

91
Lib/asyncio/futures.py
View File

@ -1,35 +1,32 @@
"""A Future class similar to the one in PEP 3148."""
__all__ = ['CancelledError', 'TimeoutError',
'InvalidStateError',
'Future', 'wrap_future', 'isfuture'
]
__all__ = ['CancelledError', 'TimeoutError', 'InvalidStateError',
'Future', 'wrap_future', 'isfuture']
import concurrent.futures._base
import concurrent.futures
import logging
import reprlib
import sys
import traceback
from . import base_futures
from . import compat
from . import events
# States for Future.
_PENDING = 'PENDING'
_CANCELLED = 'CANCELLED'
_FINISHED = 'FINISHED'
Error = concurrent.futures._base.Error
CancelledError = concurrent.futures.CancelledError
TimeoutError = concurrent.futures.TimeoutError
CancelledError = base_futures.CancelledError
InvalidStateError = base_futures.InvalidStateError
TimeoutError = base_futures.TimeoutError
isfuture = base_futures.isfuture
_PENDING = base_futures._PENDING
_CANCELLED = base_futures._CANCELLED
_FINISHED = base_futures._FINISHED
STACK_DEBUG = logging.DEBUG - 1 # heavy-duty debugging
class InvalidStateError(Error):
"""The operation is not allowed in this state."""
class _TracebackLogger:
"""Helper to log a traceback upon destruction if not cleared.
@ -110,56 +107,6 @@ class _TracebackLogger:
self.loop.call_exception_handler({'message': msg})
def isfuture(obj):
"""Check for a Future.
This returns True when obj is a Future instance or is advertising
itself as duck-type compatible by setting _asyncio_future_blocking.
See comment in Future for more details.
"""
return getattr(obj, '_asyncio_future_blocking', None) is not None
def _format_callbacks(cb):
"""helper function for Future.__repr__"""
size = len(cb)
if not size:
cb = ''
def format_cb(callback):
return events._format_callback_source(callback, ())
if size == 1:
cb = format_cb(cb[0])
elif size == 2:
cb = '{}, {}'.format(format_cb(cb[0]), format_cb(cb[1]))
elif size > 2:
cb = '{}, <{} more>, {}'.format(format_cb(cb[0]),
size-2,
format_cb(cb[-1]))
return 'cb=[%s]' % cb
def _future_repr_info(future):
# (Future) -> str
"""helper function for Future.__repr__"""
info = [future._state.lower()]
if future._state == _FINISHED:
if future._exception is not None:
info.append('exception={!r}'.format(future._exception))
else:
# use reprlib to limit the length of the output, especially
# for very long strings
result = reprlib.repr(future._result)
info.append('result={}'.format(result))
if future._callbacks:
info.append(_format_callbacks(future._callbacks))
if future._source_traceback:
frame = future._source_traceback[-1]
info.append('created at %s:%s' % (frame[0], frame[1]))
return info
class Future:
"""This class is *almost* compatible with concurrent.futures.Future.
@ -212,7 +159,7 @@ class Future:
if self._loop.get_debug():
self._source_traceback = traceback.extract_stack(sys._getframe(1))
_repr_info = _future_repr_info
_repr_info = base_futures._future_repr_info
def __repr__(self):
return '<%s %s>' % (self.__class__.__name__, ' '.join(self._repr_info()))
@ -247,10 +194,10 @@ class Future:
if self._state != _PENDING:
return False
self._state = _CANCELLED
self.__schedule_callbacks()
self._schedule_callbacks()
return True
def __schedule_callbacks(self):
def _schedule_callbacks(self):
"""Internal: Ask the event loop to call all callbacks.
The callbacks are scheduled to be called as soon as possible. Also
@ -352,7 +299,7 @@ class Future:
raise InvalidStateError('{}: {!r}'.format(self._state, self))
self._result = result
self._state = _FINISHED
self.__schedule_callbacks()
self._schedule_callbacks()
def set_exception(self, exception):
"""Mark the future done and set an exception.
@ -369,7 +316,7 @@ class Future:
"and cannot be raised into a Future")
self._exception = exception
self._state = _FINISHED
self.__schedule_callbacks()
self._schedule_callbacks()
if compat.PY34:
self._log_traceback = True
else:

80
Lib/asyncio/tasks.py
View File

@ -9,11 +9,10 @@ __all__ = ['Task',
import concurrent.futures
import functools
import inspect
import linecache
import traceback
import warnings
import weakref
from . import base_tasks
from . import compat
from . import coroutines
from . import events
@ -93,18 +92,7 @@ class Task(futures.Future):
futures.Future.__del__(self)
def _repr_info(self):
info = super()._repr_info()
if self._must_cancel:
# replace status
info[0] = 'cancelling'
coro = coroutines._format_coroutine(self._coro)
info.insert(1, 'coro=<%s>' % coro)
if self._fut_waiter is not None:
info.insert(2, 'wait_for=%r' % self._fut_waiter)
return info
return base_tasks._task_repr_info(self)
def get_stack(self, *, limit=None):
"""Return the list of stack frames for this task's coroutine.
@ -127,31 +115,7 @@ class Task(futures.Future):
For reasons beyond our control, only one stack frame is
returned for a suspended coroutine.
"""
frames = []
try:
# 'async def' coroutines
f = self._coro.cr_frame
except AttributeError:
f = self._coro.gi_frame
if f is not None:
while f is not None:
if limit is not None:
if limit <= 0:
break
limit -= 1
frames.append(f)
f = f.f_back
frames.reverse()
elif self._exception is not None:
tb = self._exception.__traceback__
while tb is not None:
if limit is not None:
if limit <= 0:
break
limit -= 1
frames.append(tb.tb_frame)
tb = tb.tb_next
return frames
return base_tasks._task_get_stack(self, limit)
def print_stack(self, *, limit=None, file=None):
"""Print the stack or traceback for this task's coroutine.
@ -162,31 +126,7 @@ class Task(futures.Future):
to which the output is written; by default output is written
to sys.stderr.
"""
extracted_list = []
checked = set()
for f in self.get_stack(limit=limit):
lineno = f.f_lineno
co = f.f_code
filename = co.co_filename
name = co.co_name
if filename not in checked:
checked.add(filename)
linecache.checkcache(filename)
line = linecache.getline(filename, lineno, f.f_globals)
extracted_list.append((filename, lineno, name, line))
exc = self._exception
if not extracted_list:
print('No stack for %r' % self, file=file)
elif exc is not None:
print('Traceback for %r (most recent call last):' % self,
file=file)
else:
print('Stack for %r (most recent call last):' % self,
file=file)
traceback.print_list(extracted_list, file=file)
if exc is not None:
for line in traceback.format_exception_only(exc.__class__, exc):
print(line, file=file, end='')
return base_tasks._task_print_stack(self, limit, file)
def cancel(self):
"""Request that this task cancel itself.
@ -316,6 +256,18 @@ class Task(futures.Future):
self = None # Needed to break cycles when an exception occurs.
_PyTask = Task
try:
import _asyncio
except ImportError:
pass
else:
# _CTask is needed for tests.
Task = _CTask = _asyncio.Task
# wait() and as_completed() similar to those in PEP 3148.
FIRST_COMPLETED = concurrent.futures.FIRST_COMPLETED

439
Lib/test/test_asyncio/test_tasks.py
View File

File diff suppressed because it is too large Load Diff

2
Misc/NEWS
View File

@ -85,6 +85,8 @@ Library
threadpool executor.
Initial patch by Hans Lawrenz.
- Issue #28544: Implement asyncio.Task in C.
Windows
-------

1990
Modules/_asynciomodule.c
View File

File diff suppressed because it is too large Load Diff

520
Modules/clinic/_asynciomodule.c.h Normal file
View File

@ -0,0 +1,520 @@
/*[clinic input]
preserve
[clinic start generated code]*/
PyDoc_STRVAR(_asyncio_Future___init____doc__,
"Future(*, loop=None)\n"
"--\n"
"\n"
"This class is *almost* compatible with concurrent.futures.Future.\n"
"\n"
" Differences:\n"
"\n"
" - result() and exception() do not take a timeout argument and\n"
" raise an exception when the future isn\'t done yet.\n"
"\n"
" - Callbacks registered with add_done_callback() are always called\n"
" via the event loop\'s call_soon_threadsafe().\n"
"\n"
" - This class is not compatible with the wait() and as_completed()\n"
" methods in the concurrent.futures package.");
static int
_asyncio_Future___init___impl(FutureObj *self, PyObject *loop);
static int
_asyncio_Future___init__(PyObject *self, PyObject *args, PyObject *kwargs)
{
int return_value = -1;
static const char * const _keywords[] = {"loop", NULL};
static _PyArg_Parser _parser = {"|$O:Future", _keywords, 0};
PyObject *loop = NULL;
if (!_PyArg_ParseTupleAndKeywordsFast(args, kwargs, &_parser,
&loop)) {
goto exit;
}
return_value = _asyncio_Future___init___impl((FutureObj *)self, loop);
exit:
return return_value;
}
PyDoc_STRVAR(_asyncio_Future_result__doc__,
"result($self, /)\n"
"--\n"
"\n"
"Return the result this future represents.\n"
"\n"
"If the future has been cancelled, raises CancelledError. If the\n"
"future\'s result isn\'t yet available, raises InvalidStateError. If\n"
"the future is done and has an exception set, this exception is raised.");
#define _ASYNCIO_FUTURE_RESULT_METHODDEF \
{"result", (PyCFunction)_asyncio_Future_result, METH_NOARGS, _asyncio_Future_result__doc__},
static PyObject *
_asyncio_Future_result_impl(FutureObj *self);
static PyObject *
_asyncio_Future_result(FutureObj *self, PyObject *Py_UNUSED(ignored))
{
return _asyncio_Future_result_impl(self);
}
PyDoc_STRVAR(_asyncio_Future_exception__doc__,
"exception($self, /)\n"
"--\n"
"\n"
"Return the exception that was set on this future.\n"
"\n"
"The exception (or None if no exception was set) is returned only if\n"
"the future is done. If the future has been cancelled, raises\n"
"CancelledError. If the future isn\'t done yet, raises\n"
"InvalidStateError.");
#define _ASYNCIO_FUTURE_EXCEPTION_METHODDEF \
{"exception", (PyCFunction)_asyncio_Future_exception, METH_NOARGS, _asyncio_Future_exception__doc__},
static PyObject *
_asyncio_Future_exception_impl(FutureObj *self);
static PyObject *
_asyncio_Future_exception(FutureObj *self, PyObject *Py_UNUSED(ignored))
{
return _asyncio_Future_exception_impl(self);
}
PyDoc_STRVAR(_asyncio_Future_set_result__doc__,
"set_result($self, res, /)\n"
"--\n"
"\n"
"Mark the future done and set its result.\n"
"\n"
"If the future is already done when this method is called, raises\n"
"InvalidStateError.");
#define _ASYNCIO_FUTURE_SET_RESULT_METHODDEF \
{"set_result", (PyCFunction)_asyncio_Future_set_result, METH_O, _asyncio_Future_set_result__doc__},
PyDoc_STRVAR(_asyncio_Future_set_exception__doc__,
"set_exception($self, exception, /)\n"
"--\n"
"\n"
"Mark the future done and set an exception.\n"
"\n"
"If the future is already done when this method is called, raises\n"
"InvalidStateError.");
#define _ASYNCIO_FUTURE_SET_EXCEPTION_METHODDEF \
{"set_exception", (PyCFunction)_asyncio_Future_set_exception, METH_O, _asyncio_Future_set_exception__doc__},
PyDoc_STRVAR(_asyncio_Future_add_done_callback__doc__,
"add_done_callback($self, fn, /)\n"
"--\n"
"\n"
"Add a callback to be run when the future becomes done.\n"
"\n"
"The callback is called with a single argument - the future object. If\n"
"the future is already done when this is called, the callback is\n"
"scheduled with call_soon.");
#define _ASYNCIO_FUTURE_ADD_DONE_CALLBACK_METHODDEF \
{"add_done_callback", (PyCFunction)_asyncio_Future_add_done_callback, METH_O, _asyncio_Future_add_done_callback__doc__},
PyDoc_STRVAR(_asyncio_Future_remove_done_callback__doc__,
"remove_done_callback($self, fn, /)\n"
"--\n"
"\n"
"Remove all instances of a callback from the \"call when done\" list.\n"
"\n"
"Returns the number of callbacks removed.");
#define _ASYNCIO_FUTURE_REMOVE_DONE_CALLBACK_METHODDEF \
{"remove_done_callback", (PyCFunction)_asyncio_Future_remove_done_callback, METH_O, _asyncio_Future_remove_done_callback__doc__},
PyDoc_STRVAR(_asyncio_Future_cancel__doc__,
"cancel($self, /)\n"
"--\n"
"\n"
"Cancel the future and schedule callbacks.\n"
"\n"
"If the future is already done or cancelled, return False. Otherwise,\n"
"change the future\'s state to cancelled, schedule the callbacks and\n"
"return True.");
#define _ASYNCIO_FUTURE_CANCEL_METHODDEF \
{"cancel", (PyCFunction)_asyncio_Future_cancel, METH_NOARGS, _asyncio_Future_cancel__doc__},
static PyObject *
_asyncio_Future_cancel_impl(FutureObj *self);
static PyObject *
_asyncio_Future_cancel(FutureObj *self, PyObject *Py_UNUSED(ignored))
{
return _asyncio_Future_cancel_impl(self);
}
PyDoc_STRVAR(_asyncio_Future_cancelled__doc__,
"cancelled($self, /)\n"
"--\n"
"\n"
"Return True if the future was cancelled.");
#define _ASYNCIO_FUTURE_CANCELLED_METHODDEF \
{"cancelled", (PyCFunction)_asyncio_Future_cancelled, METH_NOARGS, _asyncio_Future_cancelled__doc__},
static PyObject *
_asyncio_Future_cancelled_impl(FutureObj *self);
static PyObject *
_asyncio_Future_cancelled(FutureObj *self, PyObject *Py_UNUSED(ignored))
{
return _asyncio_Future_cancelled_impl(self);
}
PyDoc_STRVAR(_asyncio_Future_done__doc__,
"done($self, /)\n"
"--\n"
"\n"
"Return True if the future is done.\n"
"\n"
"Done means either that a result / exception are available, or that the\n"
"future was cancelled.");
#define _ASYNCIO_FUTURE_DONE_METHODDEF \
{"done", (PyCFunction)_asyncio_Future_done, METH_NOARGS, _asyncio_Future_done__doc__},
static PyObject *
_asyncio_Future_done_impl(FutureObj *self);
static PyObject *
_asyncio_Future_done(FutureObj *self, PyObject *Py_UNUSED(ignored))
{
return _asyncio_Future_done_impl(self);
}
PyDoc_STRVAR(_asyncio_Future__repr_info__doc__,
"_repr_info($self, /)\n"
"--\n"
"\n");
#define _ASYNCIO_FUTURE__REPR_INFO_METHODDEF \
{"_repr_info", (PyCFunction)_asyncio_Future__repr_info, METH_NOARGS, _asyncio_Future__repr_info__doc__},
static PyObject *
_asyncio_Future__repr_info_impl(FutureObj *self);
static PyObject *
_asyncio_Future__repr_info(FutureObj *self, PyObject *Py_UNUSED(ignored))
{
return _asyncio_Future__repr_info_impl(self);
}
PyDoc_STRVAR(_asyncio_Future__schedule_callbacks__doc__,
"_schedule_callbacks($self, /)\n"
"--\n"
"\n");
#define _ASYNCIO_FUTURE__SCHEDULE_CALLBACKS_METHODDEF \
{"_schedule_callbacks", (PyCFunction)_asyncio_Future__schedule_callbacks, METH_NOARGS, _asyncio_Future__schedule_callbacks__doc__},
static PyObject *
_asyncio_Future__schedule_callbacks_impl(FutureObj *self);
static PyObject *
_asyncio_Future__schedule_callbacks(FutureObj *self, PyObject *Py_UNUSED(ignored))
{
return _asyncio_Future__schedule_callbacks_impl(self);
}
PyDoc_STRVAR(_asyncio_Task___init____doc__,
"Task(coro, *, loop=None)\n"
"--\n"
"\n"
"A coroutine wrapped in a Future.");
static int
_asyncio_Task___init___impl(TaskObj *self, PyObject *coro, PyObject *loop);
static int
_asyncio_Task___init__(PyObject *self, PyObject *args, PyObject *kwargs)
{
int return_value = -1;
static const char * const _keywords[] = {"coro", "loop", NULL};
static _PyArg_Parser _parser = {"O|$O:Task", _keywords, 0};
PyObject *coro;
PyObject *loop = NULL;
if (!_PyArg_ParseTupleAndKeywordsFast(args, kwargs, &_parser,
&coro, &loop)) {
goto exit;
}
return_value = _asyncio_Task___init___impl((TaskObj *)self, coro, loop);
exit:
return return_value;
}
PyDoc_STRVAR(_asyncio_Task_current_task__doc__,
"current_task($type, /, loop=None)\n"
"--\n"
"\n"
"Return the currently running task in an event loop or None.\n"
"\n"
"By default the current task for the current event loop is returned.\n"
"\n"
"None is returned when called not in the context of a Task.");
#define _ASYNCIO_TASK_CURRENT_TASK_METHODDEF \
{"current_task", (PyCFunction)_asyncio_Task_current_task, METH_FASTCALL|METH_CLASS, _asyncio_Task_current_task__doc__},
static PyObject *
_asyncio_Task_current_task_impl(PyTypeObject *type, PyObject *loop);
static PyObject *
_asyncio_Task_current_task(PyTypeObject *type, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
{
PyObject *return_value = NULL;
static const char * const _keywords[] = {"loop", NULL};
static _PyArg_Parser _parser = {"|O:current_task", _keywords, 0};
PyObject *loop = NULL;
if (!_PyArg_ParseStack(args, nargs, kwnames, &_parser,
&loop)) {
goto exit;
}
return_value = _asyncio_Task_current_task_impl(type, loop);
exit:
return return_value;
}
PyDoc_STRVAR(_asyncio_Task_all_tasks__doc__,
"all_tasks($type, /, loop=None)\n"
"--\n"
"\n"
"Return a set of all tasks for an event loop.\n"
"\n"
"By default all tasks for the current event loop are returned.");
#define _ASYNCIO_TASK_ALL_TASKS_METHODDEF \
{"all_tasks", (PyCFunction)_asyncio_Task_all_tasks, METH_FASTCALL|METH_CLASS, _asyncio_Task_all_tasks__doc__},
static PyObject *
_asyncio_Task_all_tasks_impl(PyTypeObject *type, PyObject *loop);
static PyObject *
_asyncio_Task_all_tasks(PyTypeObject *type, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
{
PyObject *return_value = NULL;
static const char * const _keywords[] = {"loop", NULL};
static _PyArg_Parser _parser = {"|O:all_tasks", _keywords, 0};
PyObject *loop = NULL;
if (!_PyArg_ParseStack(args, nargs, kwnames, &_parser,
&loop)) {
goto exit;
}
return_value = _asyncio_Task_all_tasks_impl(type, loop);
exit:
return return_value;
}
PyDoc_STRVAR(_asyncio_Task__repr_info__doc__,
"_repr_info($self, /)\n"
"--\n"
"\n");
#define _ASYNCIO_TASK__REPR_INFO_METHODDEF \
{"_repr_info", (PyCFunction)_asyncio_Task__repr_info, METH_NOARGS, _asyncio_Task__repr_info__doc__},
static PyObject *
_asyncio_Task__repr_info_impl(TaskObj *self);
static PyObject *
_asyncio_Task__repr_info(TaskObj *self, PyObject *Py_UNUSED(ignored))
{
return _asyncio_Task__repr_info_impl(self);
}
PyDoc_STRVAR(_asyncio_Task_cancel__doc__,
"cancel($self, /)\n"
"--\n"
"\n"
"Request that this task cancel itself.\n"
"\n"
"This arranges for a CancelledError to be thrown into the\n"
"wrapped coroutine on the next cycle through the event loop.\n"
"The coroutine then has a chance to clean up or even deny\n"
"the request using try/except/finally.\n"
"\n"
"Unlike Future.cancel, this does not guarantee that the\n"
"task will be cancelled: the exception might be caught and\n"
"acted upon, delaying cancellation of the task or preventing\n"
"cancellation completely. The task may also return a value or\n"
"raise a different exception.\n"
"\n"
"Immediately after this method is called, Task.cancelled() will\n"
"not return True (unless the task was already cancelled). A\n"
"task will be marked as cancelled when the wrapped coroutine\n"
"terminates with a CancelledError exception (even if cancel()\n"
"was not called).");
#define _ASYNCIO_TASK_CANCEL_METHODDEF \
{"cancel", (PyCFunction)_asyncio_Task_cancel, METH_NOARGS, _asyncio_Task_cancel__doc__},
static PyObject *
_asyncio_Task_cancel_impl(TaskObj *self);
static PyObject *
_asyncio_Task_cancel(TaskObj *self, PyObject *Py_UNUSED(ignored))
{
return _asyncio_Task_cancel_impl(self);
}
PyDoc_STRVAR(_asyncio_Task_get_stack__doc__,
"get_stack($self, /, *, limit=None)\n"
"--\n"
"\n"
"Return the list of stack frames for this task\'s coroutine.\n"
"\n"
"If the coroutine is not done, this returns the stack where it is\n"
"suspended. If the coroutine has completed successfully or was\n"
"cancelled, this returns an empty list. If the coroutine was\n"
"terminated by an exception, this returns the list of traceback\n"
"frames.\n"
"\n"
"The frames are always ordered from oldest to newest.\n"
"\n"
"The optional limit gives the maximum number of frames to\n"
"return; by default all available frames are returned. Its\n"
"meaning differs depending on whether a stack or a traceback is\n"
"returned: the newest frames of a stack are returned, but the\n"
"oldest frames of a traceback are returned. (This matches the\n"
"behavior of the traceback module.)\n"
"\n"
"For reasons beyond our control, only one stack frame is\n"
"returned for a suspended coroutine.");
#define _ASYNCIO_TASK_GET_STACK_METHODDEF \
{"get_stack", (PyCFunction)_asyncio_Task_get_stack, METH_FASTCALL, _asyncio_Task_get_stack__doc__},
static PyObject *
_asyncio_Task_get_stack_impl(TaskObj *self, PyObject *limit);
static PyObject *
_asyncio_Task_get_stack(TaskObj *self, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
{
PyObject *return_value = NULL;
static const char * const _keywords[] = {"limit", NULL};
static _PyArg_Parser _parser = {"|$O:get_stack", _keywords, 0};
PyObject *limit = Py_None;
if (!_PyArg_ParseStack(args, nargs, kwnames, &_parser,
&limit)) {
goto exit;
}
return_value = _asyncio_Task_get_stack_impl(self, limit);
exit:
return return_value;
}
PyDoc_STRVAR(_asyncio_Task_print_stack__doc__,
"print_stack($self, /, *, limit=None, file=None)\n"
"--\n"
"\n"
"Print the stack or traceback for this task\'s coroutine.\n"
"\n"
"This produces output similar to that of the traceback module,\n"
"for the frames retrieved by get_stack(). The limit argument\n"
"is passed to get_stack(). The file argument is an I/O stream\n"
"to which the output is written; by default output is written\n"
"to sys.stderr.");
#define _ASYNCIO_TASK_PRINT_STACK_METHODDEF \
{"print_stack", (PyCFunction)_asyncio_Task_print_stack, METH_FASTCALL, _asyncio_Task_print_stack__doc__},
static PyObject *
_asyncio_Task_print_stack_impl(TaskObj *self, PyObject *limit,
PyObject *file);
static PyObject *
_asyncio_Task_print_stack(TaskObj *self, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
{
PyObject *return_value = NULL;
static const char * const _keywords[] = {"limit", "file", NULL};
static _PyArg_Parser _parser = {"|$OO:print_stack", _keywords, 0};
PyObject *limit = Py_None;
PyObject *file = Py_None;
if (!_PyArg_ParseStack(args, nargs, kwnames, &_parser,
&limit, &file)) {
goto exit;
}
return_value = _asyncio_Task_print_stack_impl(self, limit, file);
exit:
return return_value;
}
PyDoc_STRVAR(_asyncio_Task__step__doc__,
"_step($self, /, exc=None)\n"
"--\n"
"\n");
#define _ASYNCIO_TASK__STEP_METHODDEF \
{"_step", (PyCFunction)_asyncio_Task__step, METH_FASTCALL, _asyncio_Task__step__doc__},
static PyObject *
_asyncio_Task__step_impl(TaskObj *self, PyObject *exc);
static PyObject *
_asyncio_Task__step(TaskObj *self, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
{
PyObject *return_value = NULL;
static const char * const _keywords[] = {"exc", NULL};
static _PyArg_Parser _parser = {"|O:_step", _keywords, 0};
PyObject *exc = NULL;
if (!_PyArg_ParseStack(args, nargs, kwnames, &_parser,
&exc)) {
goto exit;
}
return_value = _asyncio_Task__step_impl(self, exc);
exit:
return return_value;
}
PyDoc_STRVAR(_asyncio_Task__wakeup__doc__,
"_wakeup($self, /, fut)\n"
"--\n"
"\n");
#define _ASYNCIO_TASK__WAKEUP_METHODDEF \
{"_wakeup", (PyCFunction)_asyncio_Task__wakeup, METH_FASTCALL, _asyncio_Task__wakeup__doc__},
static PyObject *
_asyncio_Task__wakeup_impl(TaskObj *self, PyObject *fut);
static PyObject *
_asyncio_Task__wakeup(TaskObj *self, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
{
PyObject *return_value = NULL;
static const char * const _keywords[] = {"fut", NULL};
static _PyArg_Parser _parser = {"O:_wakeup", _keywords, 0};
PyObject *fut;
if (!_PyArg_ParseStack(args, nargs, kwnames, &_parser,
&fut)) {
goto exit;
}
return_value = _asyncio_Task__wakeup_impl(self, fut);
exit:
return return_value;
}
/*[clinic end generated code: output=8f036321bb083066 input=a9049054013a1b77]*/