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Closes #21886, #21447: Fix a race condition in asyncio when setting the result

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of a Future with call_soon(). Add an helper, a private method, to set the
result only if the future was not cancelled.
This commit is contained in:
Victor Stinner 2014-07-05 15:29:41 +02:00
parent 5021cb553c
commit a9acbe82e7
9 changed files with 31 additions and 7 deletions
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4
Lib/asyncio/unix_events.py
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@ -269,7 +269,7 @@ class _UnixReadPipeTransport(transports.ReadTransport):
self._loop.add_reader(self._fileno, self._read_ready)
self._loop.call_soon(self._protocol.connection_made, self)
if waiter is not None:
self._loop.call_soon(waiter.set_result, None)
self._loop.call_soon(waiter._set_result_unless_cancelled, None)
def _read_ready(self):
try:
@ -353,7 +353,7 @@ class _UnixWritePipeTransport(transports._FlowControlMixin,
self._loop.call_soon(self._protocol.connection_made, self)
if waiter is not None:
self._loop.call_soon(waiter.set_result, None)
self._loop.call_soon(waiter._set_result_unless_cancelled, None)
def get_write_buffer_size(self):
return sum(len(data) for data in self._buffer)