[Python-checkins] cpython: asyncio: Add write flow control to unix pipes.
guido.van.rossum
python-checkins at python.org
Wed Jan 29 23:41:54 CET 2014
http://hg.python.org/cpython/rev/c71fa690254b
changeset: 88821:c71fa690254b
user: Guido van Rossum <guido at python.org>
date: Wed Jan 29 13:20:39 2014 -0800
summary:
asyncio: Add write flow control to unix pipes.
files:
Lib/asyncio/unix_events.py | 14 +++++++++++---
1 files changed, 11 insertions(+), 3 deletions(-)
diff --git a/Lib/asyncio/unix_events.py b/Lib/asyncio/unix_events.py
--- a/Lib/asyncio/unix_events.py
+++ b/Lib/asyncio/unix_events.py
@@ -246,7 +246,8 @@
self._loop = None
-class _UnixWritePipeTransport(transports.WriteTransport):
+class _UnixWritePipeTransport(selector_events._FlowControlMixin,
+ transports.WriteTransport):
def __init__(self, loop, pipe, protocol, waiter=None, extra=None):
super().__init__(extra)
@@ -277,12 +278,17 @@
if waiter is not None:
self._loop.call_soon(waiter.set_result, None)
+ def get_write_buffer_size(self):
+ return sum(len(data) for data in self._buffer)
+
def _read_ready(self):
# Pipe was closed by peer.
self._close()
def write(self, data):
- assert isinstance(data, bytes), repr(data)
+ assert isinstance(data, (bytes, bytearray, memoryview)), repr(data)
+ if isinstance(data, bytearray):
+ data = memoryview(data)
if not data:
return
@@ -310,6 +316,7 @@
self._loop.add_writer(self._fileno, self._write_ready)
self._buffer.append(data)
+ self._maybe_pause_protocol()
def _write_ready(self):
data = b''.join(self._buffer)
@@ -329,7 +336,8 @@
else:
if n == len(data):
self._loop.remove_writer(self._fileno)
- if self._closing:
+ self._maybe_resume_protocol() # May append to buffer.
+ if not self._buffer and self._closing:
self._loop.remove_reader(self._fileno)
self._call_connection_lost(None)
return
--
Repository URL: http://hg.python.org/cpython
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