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bpo-32356: idempotent pause_/resume_reading; new is_reading method. (#4914)

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Yury Selivanov 2017-12-18 17:03:23 -05:00 • committed by GitHub
parent 2d8f06382e
commit d757aaf9dd
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9 changed files with 87 additions and 24 deletions
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15
Lib/asyncio/selector_events.py
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@ -702,22 +702,21 @@ class _SelectorSocketTransport(_SelectorTransport):
self._loop.call_soon(futures._set_result_unless_cancelled,
waiter, None)
def is_reading(self):
return not self._paused and not self._closing
def pause_reading(self):
if self._closing:
raise RuntimeError('Cannot pause_reading() when closing')
if self._paused:
raise RuntimeError('Already paused')
if self._closing or self._paused:
return
self._paused = True
self._loop._remove_reader(self._sock_fd)
if self._loop.get_debug():
logger.debug("%r pauses reading", self)
def resume_reading(self):
if not self._paused:
raise RuntimeError('Not paused')
self._paused = False
if self._closing:
if self._closing or not self._paused:
return
self._paused = False
self._loop._add_reader(self._sock_fd, self._read_ready)
if self._loop.get_debug():
logger.debug("%r resumes reading", self)