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Copy pathloop.pyx
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3416 lines (2799 loc) · 115 KB
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# cython: language_level=3, embedsignature=True, freethreading_compatible=True
import asyncio
cimport cython
from .includes.debug cimport UVLOOP_DEBUG
from .includes cimport uv
from .includes cimport system
from .includes.python cimport (
PY_VERSION_HEX,
PyMem_RawMalloc, PyMem_RawFree,
PyMem_RawCalloc, PyMem_RawRealloc,
PyUnicode_EncodeFSDefault,
PyErr_SetInterrupt,
_Py_RestoreSignals,
Context_CopyCurrent,
Context_Enter,
Context_Exit,
PyMemoryView_FromMemory, PyBUF_WRITE,
PyMemoryView_FromObject, PyMemoryView_Check,
PyOS_AfterFork_Parent, PyOS_AfterFork_Child,
PyOS_BeforeFork,
PyUnicode_FromString
)
from .includes.flowcontrol cimport add_flowcontrol_defaults
from libc.stdint cimport uint64_t
from libc.string cimport memset, strerror, memcpy
from libc cimport errno
from cpython cimport PyObject
from cpython cimport PyErr_CheckSignals, PyErr_Occurred
from cpython cimport PyThread_get_thread_ident
from cpython cimport Py_INCREF, Py_DECREF, Py_XDECREF, Py_XINCREF
from cpython cimport (
PyObject_GetBuffer, PyBuffer_Release, PyBUF_SIMPLE,
Py_buffer, PyBytes_AsString, PyBytes_CheckExact,
PyBytes_AsStringAndSize,
Py_SIZE, PyBytes_AS_STRING, PyBUF_WRITABLE
)
from cpython.pycapsule cimport PyCapsule_New, PyCapsule_GetPointer
from . import _noop
include "includes/stdlib.pxi"
include "errors.pyx"
cdef:
int PY39 = PY_VERSION_HEX >= 0x03090000
int PY311 = PY_VERSION_HEX >= 0x030b0000
int PY313 = PY_VERSION_HEX >= 0x030d0000
uint64_t MAX_SLEEP = 3600 * 24 * 365 * 100
cdef _is_sock_stream(sock_type):
if SOCK_NONBLOCK == -1:
return sock_type == uv.SOCK_STREAM
else:
# Linux's socket.type is a bitmask that can include extra info
# about socket (like SOCK_NONBLOCK bit), therefore we can't do simple
# `sock_type == socket.SOCK_STREAM`, see
# https://github.com/torvalds/linux/blob/v4.13/include/linux/net.h#L77
# for more details.
return (sock_type & 0xF) == uv.SOCK_STREAM
cdef _is_sock_dgram(sock_type):
if SOCK_NONBLOCK == -1:
return sock_type == uv.SOCK_DGRAM
else:
# Read the comment in `_is_sock_stream`.
return (sock_type & 0xF) == uv.SOCK_DGRAM
cdef isfuture(obj):
if aio_isfuture is None:
return isinstance(obj, aio_Future)
else:
return aio_isfuture(obj)
cdef inline socket_inc_io_ref(sock):
if isinstance(sock, socket_socket):
sock._io_refs += 1
cdef inline socket_dec_io_ref(sock):
if isinstance(sock, socket_socket):
sock._decref_socketios()
cdef inline run_in_context(context, method):
Context_Enter(context)
try:
return method()
finally:
Context_Exit(context)
cdef inline run_in_context1(context, method, arg):
Context_Enter(context)
try:
return method(arg)
finally:
Context_Exit(context)
cdef inline run_in_context2(context, method, arg1, arg2):
Context_Enter(context)
try:
return method(arg1, arg2)
finally:
Context_Exit(context)
# Used for deprecation and removal of `loop.create_datagram_endpoint()`'s
# *reuse_address* parameter
_unset = object()
@cython.no_gc_clear
cdef class Loop:
def __cinit__(self):
cdef int err
# Install PyMem* memory allocators if they aren't installed yet.
__install_pymem()
# Install pthread_atfork handlers
__install_atfork()
self.uvloop = <uv.uv_loop_t*>PyMem_RawMalloc(sizeof(uv.uv_loop_t))
if self.uvloop is NULL:
raise MemoryError()
self.slow_callback_duration = 0.1
self._closed = 0
self._debug = 0
self._thread_id = 0
self._running = 0
self._stopping = 0
self._transports = weakref_WeakValueDictionary()
self._processes = set()
# Used to keep a reference (and hence keep the fileobj alive)
# for as long as its registered by add_reader or add_writer.
# This is how the selector module and hence asyncio behaves.
self._fd_to_reader_fileobj = {}
self._fd_to_writer_fileobj = {}
self._unix_server_sockets = {}
self._timers = set()
self._polls = {}
self._recv_buffer_in_use = 0
err = uv.uv_loop_init(self.uvloop)
if err < 0:
raise convert_error(err)
self.uvloop.data = <void*> self
self._init_debug_fields()
self.active_process_handler = None
self._last_error = None
self._task_factory = None
self._exception_handler = None
self._default_executor = None
self._queued_streams = set()
self._executing_streams = set()
self._ready = col_deque()
self.handler_async = UVAsync.new(
self, <method_t>self._on_wake, self)
self.handler_idle = UVIdle.new(
self,
new_MethodHandle(
self, "loop._on_idle", <method_t>self._on_idle, None, self))
# Needed to call `UVStream._exec_write` for writes scheduled
# during `Protocol.data_received`.
self.handler_check__exec_writes = UVCheck.new(
self,
new_MethodHandle(
self, "loop._exec_queued_writes",
<method_t>self._exec_queued_writes, None, self))
self._signals = set()
self._ssock = self._csock = None
self._signal_handlers = {}
self._listening_signals = False
self._old_signal_wakeup_id = -1
self._coroutine_debug_set = False
# A weak set of all asynchronous generators that are
# being iterated by the loop.
self._asyncgens = weakref_WeakSet()
# Set to True when `loop.shutdown_asyncgens` is called.
self._asyncgens_shutdown_called = False
# Set to True when `loop.shutdown_default_executor` is called.
self._executor_shutdown_called = False
self._servers = set()
cdef inline _is_main_thread(self):
cdef uint64_t main_thread_id = system.MAIN_THREAD_ID
if system.MAIN_THREAD_ID_SET == 0:
main_thread_id = <uint64_t>threading_main_thread().ident
system.setMainThreadID(main_thread_id)
return main_thread_id == PyThread_get_thread_ident()
def __init__(self):
self.set_debug(
sys_dev_mode or (not sys_ignore_environment
and bool(os_environ.get('PYTHONASYNCIODEBUG'))))
def __dealloc__(self):
if self._running == 1:
raise RuntimeError('deallocating a running event loop!')
if self._closed == 0:
aio_logger.error("deallocating an open event loop")
return
PyMem_RawFree(self.uvloop)
self.uvloop = NULL
cdef _init_debug_fields(self):
self._debug_cc = bool(UVLOOP_DEBUG)
if UVLOOP_DEBUG:
self._debug_handles_current = col_Counter()
self._debug_handles_closed = col_Counter()
self._debug_handles_total = col_Counter()
else:
self._debug_handles_current = None
self._debug_handles_closed = None
self._debug_handles_total = None
self._debug_uv_handles_total = 0
self._debug_uv_handles_freed = 0
self._debug_stream_read_cb_total = 0
self._debug_stream_read_eof_total = 0
self._debug_stream_read_errors_total = 0
self._debug_stream_read_cb_errors_total = 0
self._debug_stream_read_eof_cb_errors_total = 0
self._debug_stream_shutdown_errors_total = 0
self._debug_stream_listen_errors_total = 0
self._debug_stream_write_tries = 0
self._debug_stream_write_errors_total = 0
self._debug_stream_write_ctx_total = 0
self._debug_stream_write_ctx_cnt = 0
self._debug_stream_write_cb_errors_total = 0
self._debug_cb_handles_total = 0
self._debug_cb_handles_count = 0
self._debug_cb_timer_handles_total = 0
self._debug_cb_timer_handles_count = 0
self._poll_read_events_total = 0
self._poll_read_cb_errors_total = 0
self._poll_write_events_total = 0
self._poll_write_cb_errors_total = 0
self._sock_try_write_total = 0
self._debug_exception_handler_cnt = 0
cdef _setup_or_resume_signals(self):
if not self._is_main_thread():
return
if self._listening_signals:
raise RuntimeError('signals handling has been already setup')
if self._ssock is not None:
raise RuntimeError('self-pipe exists before loop run')
# Create a self-pipe and call set_signal_wakeup_fd() with one
# of its ends. This is needed so that libuv knows that it needs
# to wakeup on ^C (no matter if the SIGINT handler is still the
# standard Python's one or or user set their own.)
self._ssock, self._csock = socket_socketpair()
try:
self._ssock.setblocking(False)
self._csock.setblocking(False)
fileno = self._csock.fileno()
self._old_signal_wakeup_id = _set_signal_wakeup_fd(fileno)
except Exception:
# Out of all statements in the try block, only the
# "_set_signal_wakeup_fd()" call can fail, but it shouldn't,
# as we ensure that the current thread is the main thread.
# Still, if something goes horribly wrong we want to clean up
# the socket pair.
self._ssock.close()
self._csock.close()
self._ssock = None
self._csock = None
raise
self._add_reader(
self._ssock,
new_MethodHandle(
self,
"Loop._read_from_self",
<method_t>self._read_from_self,
None,
self))
self._listening_signals = True
cdef _pause_signals(self):
if not self._is_main_thread():
if self._listening_signals:
raise RuntimeError(
'cannot pause signals handling; no longer running in '
'the main thread')
else:
return
if not self._listening_signals:
raise RuntimeError('signals handling has not been setup')
self._listening_signals = False
_set_signal_wakeup_fd(self._old_signal_wakeup_id)
self._remove_reader(self._ssock)
self._ssock.close()
self._csock.close()
self._ssock = None
self._csock = None
cdef _shutdown_signals(self):
if not self._is_main_thread():
if self._signal_handlers:
aio_logger.warning(
'cannot cleanup signal handlers: closing the event loop '
'in a non-main OS thread')
return
if self._listening_signals:
raise RuntimeError(
'cannot shutdown signals handling as it has not been paused')
if self._ssock:
raise RuntimeError(
'self-pipe was not cleaned up after loop was run')
for sig in list(self._signal_handlers):
self.remove_signal_handler(sig)
def __sighandler(self, signum, frame):
self._signals.add(signum)
cdef inline _ceval_process_signals(self):
# Invoke CPython eval loop to let process signals.
PyErr_CheckSignals()
# Calling a pure-Python function will invoke
# _PyEval_EvalFrameDefault which will process
# pending signal callbacks.
_noop.noop() # Might raise ^C
cdef _read_from_self(self):
cdef bytes sigdata
sigdata = b''
while True:
try:
data = self._ssock.recv(65536)
if not data:
break
sigdata += data
except InterruptedError:
continue
except BlockingIOError:
break
if sigdata:
self._invoke_signals(sigdata)
cdef _invoke_signals(self, bytes data):
cdef set sigs
self._ceval_process_signals()
sigs = self._signals.copy()
self._signals.clear()
for signum in data:
if not signum:
# ignore null bytes written by set_wakeup_fd()
continue
sigs.discard(signum)
self._handle_signal(signum)
for signum in sigs:
# Since not all signals are registered by add_signal_handler()
# (for instance, we use the default SIGINT handler) not all
# signals will trigger loop.__sighandler() callback. Therefore
# we combine two datasources: one is self-pipe, one is data
# from __sighandler; this ensures that signals shouldn't be
# lost even if set_wakeup_fd() couldn't write to the self-pipe.
self._handle_signal(signum)
cdef _handle_signal(self, sig):
cdef Handle handle
try:
handle = <Handle>(self._signal_handlers[sig])
except KeyError:
handle = None
if handle is None:
self._ceval_process_signals()
return
if handle._cancelled:
self.remove_signal_handler(sig) # Remove it properly.
else:
self._append_ready_handle(handle)
self.handler_async.send()
cdef _on_wake(self):
if ((len(self._ready) > 0 or self._stopping) and
not self.handler_idle.running):
self.handler_idle.start()
cdef _on_idle(self):
cdef:
int i, ntodo
object popleft = self._ready.popleft
Handle handler
ntodo = len(self._ready)
if self._debug:
for i from 0 <= i < ntodo:
handler = <Handle> popleft()
if handler._cancelled == 0:
try:
started = time_monotonic()
handler._run()
except BaseException as ex:
self._stop(ex)
return
else:
delta = time_monotonic() - started
if delta > self.slow_callback_duration:
aio_logger.warning(
'Executing %s took %.3f seconds',
handler._format_handle(), delta)
else:
for i from 0 <= i < ntodo:
handler = <Handle> popleft()
if handler._cancelled == 0:
try:
handler._run()
except BaseException as ex:
self._stop(ex)
return
if len(self._queued_streams):
self._exec_queued_writes()
if len(self._ready) == 0 and self.handler_idle.running:
self.handler_idle.stop()
if self._stopping:
uv.uv_stop(self.uvloop) # void
cdef _stop(self, exc):
if exc is not None:
self._last_error = exc
if self._stopping == 1:
return
self._stopping = 1
if not self.handler_idle.running:
self.handler_idle.start()
cdef __run(self, uv.uv_run_mode mode):
# Although every UVHandle holds a reference to the loop,
# we want to do everything to ensure that the loop will
# never deallocate during the run -- so we do some
# manual refs management.
Py_INCREF(self)
with nogil:
err = uv.uv_run(self.uvloop, mode)
Py_DECREF(self)
if err < 0:
raise convert_error(err)
cdef _run(self, uv.uv_run_mode mode):
cdef int err
if self._closed == 1:
raise RuntimeError('unable to start the loop; it was closed')
if self._running == 1:
raise RuntimeError('this event loop is already running.')
if (aio_get_running_loop is not None and
aio_get_running_loop() is not None):
raise RuntimeError(
'Cannot run the event loop while another loop is running')
# reset _last_error
self._last_error = None
self._thread_id = PyThread_get_thread_ident()
self._running = 1
self.handler_check__exec_writes.start()
self.handler_idle.start()
self._setup_or_resume_signals()
if aio_set_running_loop is not None:
aio_set_running_loop(self)
try:
self.__run(mode)
finally:
if aio_set_running_loop is not None:
aio_set_running_loop(None)
self.handler_check__exec_writes.stop()
self.handler_idle.stop()
self._pause_signals()
self._thread_id = 0
self._running = 0
self._stopping = 0
if self._last_error is not None:
# The loop was stopped with an error with 'loop._stop(error)' call
raise self._last_error
cdef _close(self):
cdef int err
if self._running == 1:
raise RuntimeError("Cannot close a running event loop")
if self._closed == 1:
return
self._closed = 1
for cb_handle in self._ready:
cb_handle.cancel()
self._ready.clear()
if self._polls:
for poll_handle in self._polls.values():
(<UVHandle>poll_handle)._close()
self._polls.clear()
if self._timers:
for timer_cbhandle in tuple(self._timers):
timer_cbhandle.cancel()
# Close all remaining handles
self.handler_async._close()
self.handler_idle._close()
self.handler_check__exec_writes._close()
__close_all_handles(self)
self._shutdown_signals()
# During this run there should be no open handles,
# so it should finish right away
self.__run(uv.UV_RUN_DEFAULT)
if self._fd_to_writer_fileobj:
for fileobj in self._fd_to_writer_fileobj.values():
socket_dec_io_ref(fileobj)
self._fd_to_writer_fileobj.clear()
if self._fd_to_reader_fileobj:
for fileobj in self._fd_to_reader_fileobj.values():
socket_dec_io_ref(fileobj)
self._fd_to_reader_fileobj.clear()
if self._timers:
raise RuntimeError(
f"new timers were queued during loop closing: {self._timers}")
if self._polls:
raise RuntimeError(
f"new poll handles were queued during loop closing: "
f"{self._polls}")
if self._ready:
raise RuntimeError(
f"new callbacks were queued during loop closing: "
f"{self._ready}")
err = uv.uv_loop_close(self.uvloop)
if err < 0:
raise convert_error(err)
self.handler_async = None
self.handler_idle = None
self.handler_check__exec_writes = None
self._executor_shutdown_called = True
executor = self._default_executor
if executor is not None:
self._default_executor = None
executor.shutdown(wait=False)
cdef uint64_t _time(self):
# asyncio doesn't have a time cache, neither should uvloop.
uv.uv_update_time(self.uvloop) # void
return uv.uv_now(self.uvloop)
cdef inline _queue_write(self, UVStream stream):
self._queued_streams.add(stream)
if not self.handler_check__exec_writes.running:
self.handler_check__exec_writes.start()
cdef _exec_queued_writes(self):
if len(self._queued_streams) == 0:
if self.handler_check__exec_writes.running:
self.handler_check__exec_writes.stop()
return
cdef:
UVStream stream
streams = self._queued_streams
self._queued_streams = self._executing_streams
self._executing_streams = streams
try:
for pystream in streams:
stream = <UVStream>pystream
stream._exec_write()
finally:
streams.clear()
if self.handler_check__exec_writes.running:
if len(self._queued_streams) == 0:
self.handler_check__exec_writes.stop()
cdef inline _call_soon(self, object callback, object args, object context):
cdef Handle handle
handle = new_Handle(self, callback, args, context)
self._call_soon_handle(handle)
return handle
cdef inline _append_ready_handle(self, Handle handle):
self._check_closed()
self._ready.append(handle)
cdef inline _call_soon_handle(self, Handle handle):
self._append_ready_handle(handle)
if not self.handler_idle.running:
self.handler_idle.start()
cdef _call_later(self, uint64_t delay, object callback, object args,
object context):
return TimerHandle(self, callback, args, delay, context)
cdef void _handle_exception(self, object ex):
if isinstance(ex, Exception):
self.call_exception_handler({'exception': ex})
else:
# BaseException
self._last_error = ex
# Exit ASAP
self._stop(None)
cdef inline _check_signal(self, sig):
if not isinstance(sig, int):
raise TypeError('sig must be an int, not {!r}'.format(sig))
if not (1 <= sig < signal_NSIG):
raise ValueError(
'sig {} out of range(1, {})'.format(sig, signal_NSIG))
cdef inline _check_closed(self):
if self._closed == 1:
raise RuntimeError('Event loop is closed')
cdef inline _check_thread(self):
if self._thread_id == 0:
return
cdef uint64_t thread_id
thread_id = <uint64_t>PyThread_get_thread_ident()
if thread_id != self._thread_id:
raise RuntimeError(
"Non-thread-safe operation invoked on an event loop other "
"than the current one")
cdef inline _new_future(self):
return aio_Future(loop=self)
cdef _track_transport(self, UVBaseTransport transport):
self._transports[transport._fileno()] = transport
cdef _track_process(self, UVProcess proc):
self._processes.add(proc)
cdef _untrack_process(self, UVProcess proc):
self._processes.discard(proc)
cdef _fileobj_to_fd(self, fileobj):
"""Return a file descriptor from a file object.
Parameters:
fileobj -- file object or file descriptor
Returns:
corresponding file descriptor
Raises:
ValueError if the object is invalid
"""
# Copy of the `selectors._fileobj_to_fd()` function.
if isinstance(fileobj, int):
fd = fileobj
else:
try:
fd = int(fileobj.fileno())
except (AttributeError, TypeError, ValueError):
raise ValueError("Invalid file object: "
"{!r}".format(fileobj)) from None
if fd < 0:
raise ValueError("Invalid file descriptor: {}".format(fd))
return fd
cdef _ensure_fd_no_transport(self, fd):
cdef UVBaseTransport tr
try:
tr = <UVBaseTransport>(self._transports[fd])
except KeyError:
pass
else:
if tr._is_alive():
raise RuntimeError(
'File descriptor {!r} is used by transport {!r}'.format(
fd, tr))
cdef _add_reader(self, fileobj, Handle handle):
cdef:
UVPoll poll
self._check_closed()
fd = self._fileobj_to_fd(fileobj)
self._ensure_fd_no_transport(fd)
try:
poll = <UVPoll>(self._polls[fd])
except KeyError:
poll = UVPoll.new(self, fd)
self._polls[fd] = poll
poll.start_reading(handle)
old_fileobj = self._fd_to_reader_fileobj.pop(fd, None)
if old_fileobj is not None:
socket_dec_io_ref(old_fileobj)
self._fd_to_reader_fileobj[fd] = fileobj
socket_inc_io_ref(fileobj)
cdef _remove_reader(self, fileobj):
cdef:
UVPoll poll
fd = self._fileobj_to_fd(fileobj)
self._ensure_fd_no_transport(fd)
mapped_fileobj = self._fd_to_reader_fileobj.pop(fd, None)
if mapped_fileobj is not None:
socket_dec_io_ref(mapped_fileobj)
if self._closed == 1:
return False
try:
poll = <UVPoll>(self._polls[fd])
except KeyError:
return False
result = poll.stop_reading()
if not poll.is_active():
del self._polls[fd]
poll._close()
return result
cdef _has_reader(self, fileobj):
cdef:
UVPoll poll
self._check_closed()
fd = self._fileobj_to_fd(fileobj)
try:
poll = <UVPoll>(self._polls[fd])
except KeyError:
return False
return poll.is_reading()
cdef _add_writer(self, fileobj, Handle handle):
cdef:
UVPoll poll
self._check_closed()
fd = self._fileobj_to_fd(fileobj)
self._ensure_fd_no_transport(fd)
try:
poll = <UVPoll>(self._polls[fd])
except KeyError:
poll = UVPoll.new(self, fd)
self._polls[fd] = poll
poll.start_writing(handle)
old_fileobj = self._fd_to_writer_fileobj.pop(fd, None)
if old_fileobj is not None:
socket_dec_io_ref(old_fileobj)
self._fd_to_writer_fileobj[fd] = fileobj
socket_inc_io_ref(fileobj)
cdef _remove_writer(self, fileobj):
cdef:
UVPoll poll
fd = self._fileobj_to_fd(fileobj)
self._ensure_fd_no_transport(fd)
mapped_fileobj = self._fd_to_writer_fileobj.pop(fd, None)
if mapped_fileobj is not None:
socket_dec_io_ref(mapped_fileobj)
if self._closed == 1:
return False
try:
poll = <UVPoll>(self._polls[fd])
except KeyError:
return False
result = poll.stop_writing()
if not poll.is_active():
del self._polls[fd]
poll._close()
return result
cdef _has_writer(self, fileobj):
cdef:
UVPoll poll
self._check_closed()
fd = self._fileobj_to_fd(fileobj)
try:
poll = <UVPoll>(self._polls[fd])
except KeyError:
return False
return poll.is_writing()
cdef _getaddrinfo(self, object host, object port,
int family, int type,
int proto, int flags,
int unpack):
if isinstance(port, str):
port = port.encode()
elif isinstance(port, int):
port = str(port).encode()
if port is not None and not isinstance(port, bytes):
raise TypeError('port must be a str, bytes or int')
if isinstance(host, str):
host = host.encode('idna')
if host is not None:
if not isinstance(host, bytes):
raise TypeError('host must be a str or bytes')
fut = self._new_future()
def callback(result):
if AddrInfo.isinstance(result):
try:
if unpack == 0:
data = result
else:
data = (<AddrInfo>result).unpack()
except (KeyboardInterrupt, SystemExit):
raise
except BaseException as ex:
if not fut.cancelled():
fut.set_exception(ex)
else:
if not fut.cancelled():
fut.set_result(data)
else:
if not fut.cancelled():
fut.set_exception(result)
AddrInfoRequest(self, host, port, family, type, proto, flags, callback)
return fut
cdef _getnameinfo(self, system.sockaddr *addr, int flags):
cdef NameInfoRequest nr
fut = self._new_future()
def callback(result):
if isinstance(result, tuple):
fut.set_result(result)
else:
fut.set_exception(result)
nr = NameInfoRequest(self, callback)
nr.query(addr, flags)
return fut
cdef _sock_recv(self, fut, sock, n):
if UVLOOP_DEBUG:
if fut.cancelled():
# Shouldn't happen with _SyncSocketReaderFuture.
raise RuntimeError(
f'_sock_recv is called on a cancelled Future')
if not self._has_reader(sock):
raise RuntimeError(
f'socket {sock!r} does not have a reader '
f'in the _sock_recv callback')
try:
data = sock.recv(n)
except (BlockingIOError, InterruptedError):
# No need to re-add the reader, let's just wait until
# the poll handler calls this callback again.
pass
except (KeyboardInterrupt, SystemExit):
raise
except BaseException as exc:
fut.set_exception(exc)
self._remove_reader(sock)
else:
fut.set_result(data)
self._remove_reader(sock)
cdef _sock_recv_into(self, fut, sock, buf):
if UVLOOP_DEBUG:
if fut.cancelled():
# Shouldn't happen with _SyncSocketReaderFuture.
raise RuntimeError(
f'_sock_recv_into is called on a cancelled Future')
if not self._has_reader(sock):
raise RuntimeError(
f'socket {sock!r} does not have a reader '
f'in the _sock_recv_into callback')
try:
data = sock.recv_into(buf)
except (BlockingIOError, InterruptedError):
# No need to re-add the reader, let's just wait until
# the poll handler calls this callback again.
pass
except (KeyboardInterrupt, SystemExit):
raise
except BaseException as exc:
fut.set_exception(exc)
self._remove_reader(sock)
else:
fut.set_result(data)
self._remove_reader(sock)
cdef _sock_sendall(self, fut, sock, data):
cdef:
Handle handle
int n