[issue22042] signal.set_wakeup_fd(fd): set the fd to non-blocking mode

[STINNER Victor]

STINNER Victor added the comment:

As suggested by Antoine, I created the issue #22054 to add os.get_blocking() and os.set_blocking() functions.

Here is the simplified patch for signal.set_wakeup_fd(fd). It now depends on the patch of the issue #22054.

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Added file: http://bugs.python.org/file36054/os_blocking-2.patch

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