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Issue #22054: Add os.get_blocking() and os.set_blocking() functions to get and

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set the blocking mode of a file descriptor (False if the O_NONBLOCK flag is
set, True otherwise). These functions are not available on Windows.
This commit is contained in:
Victor Stinner 2014-07-29 22:32:47 +02:00
parent 6aa4269ed2
commit 1db9e7bb19
13 changed files with 198 additions and 58 deletions
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11
Lib/asyncio/unix_events.py
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@ -1,7 +1,6 @@
"""Selector event loop for Unix with signal handling."""
import errno
import fcntl
import os
import signal
import socket
@ -259,12 +258,6 @@ class _UnixSelectorEventLoop(selector_events.BaseSelectorEventLoop):
return server
def _set_nonblocking(fd):
flags = fcntl.fcntl(fd, fcntl.F_GETFL)
flags = flags | os.O_NONBLOCK
fcntl.fcntl(fd, fcntl.F_SETFL, flags)
class _UnixReadPipeTransport(transports.ReadTransport):
max_size = 256 * 1024 # max bytes we read in one event loop iteration
@ -280,7 +273,7 @@ class _UnixReadPipeTransport(transports.ReadTransport):
stat.S_ISSOCK(mode) or
stat.S_ISCHR(mode)):
raise ValueError("Pipe transport is for pipes/sockets only.")
_set_nonblocking(self._fileno)
os.set_blocking(self._fileno, False)
self._protocol = protocol
self._closing = False
self._loop.add_reader(self._fileno, self._read_ready)
@ -373,7 +366,7 @@ class _UnixWritePipeTransport(transports._FlowControlMixin,
stat.S_ISCHR(mode)):
raise ValueError("Pipe transport is only for "
"pipes, sockets and character devices")
_set_nonblocking(self._fileno)
os.set_blocking(self._fileno, False)
self._protocol = protocol
self._buffer = []
self._conn_lost = 0