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bpo-38019: correctly handle pause/resume reading of closed asyncio unix pipe (GH-16472)

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Andrew Svetlov 2019-09-29 15:00:35 +03:00 • committed by GitHub
parent 9a7d951950
commit 58498bc717
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3 changed files with 39 additions and 0 deletions
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11
Lib/asyncio/unix_events.py
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@ -445,6 +445,7 @@ class _UnixReadPipeTransport(transports.ReadTransport):
self._fileno = pipe.fileno()
self._protocol = protocol
self._closing = False
self._paused = False
mode = os.fstat(self._fileno).st_mode
if not (stat.S_ISFIFO(mode) or
@ -506,10 +507,20 @@ class _UnixReadPipeTransport(transports.ReadTransport):
self._loop.call_soon(self._call_connection_lost, None)
def pause_reading(self):
if self._closing or self._paused:
return
self._paused = True
self._loop._remove_reader(self._fileno)
if self._loop.get_debug():
logger.debug("%r pauses reading", self)
def resume_reading(self):
if self._closing or not self._paused:
return
self._paused = False
self._loop._add_reader(self._fileno, self._read_ready)
if self._loop.get_debug():
logger.debug("%r resumes reading", self)
def set_protocol(self, protocol):
self._protocol = protocol