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asyncio: Add write flow control to unix pipes.
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3ccead1f6a
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@ -246,7 +246,8 @@ class _UnixReadPipeTransport(transports.ReadTransport):
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self._loop = None
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class _UnixWritePipeTransport(transports.WriteTransport):
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class _UnixWritePipeTransport(selector_events._FlowControlMixin,
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transports.WriteTransport):
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def __init__(self, loop, pipe, protocol, waiter=None, extra=None):
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super().__init__(extra)
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@ -277,12 +278,17 @@ class _UnixWritePipeTransport(transports.WriteTransport):
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if waiter is not None:
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self._loop.call_soon(waiter.set_result, None)
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def get_write_buffer_size(self):
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return sum(len(data) for data in self._buffer)
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def _read_ready(self):
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# Pipe was closed by peer.
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self._close()
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def write(self, data):
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assert isinstance(data, bytes), repr(data)
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assert isinstance(data, (bytes, bytearray, memoryview)), repr(data)
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if isinstance(data, bytearray):
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data = memoryview(data)
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if not data:
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return
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@ -310,6 +316,7 @@ class _UnixWritePipeTransport(transports.WriteTransport):
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self._loop.add_writer(self._fileno, self._write_ready)
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self._buffer.append(data)
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self._maybe_pause_protocol()
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def _write_ready(self):
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data = b''.join(self._buffer)
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@ -329,7 +336,8 @@ class _UnixWritePipeTransport(transports.WriteTransport):
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else:
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if n == len(data):
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self._loop.remove_writer(self._fileno)
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if self._closing:
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self._maybe_resume_protocol() # May append to buffer.
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if not self._buffer and self._closing:
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self._loop.remove_reader(self._fileno)
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self._call_connection_lost(None)
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return
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