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In python 3.7, async is now a keyword, so this throws a syntax error:
File "/usr/lib64/python3.7/site-packages/libvirtaio.py", line 49
from asyncio import async as ensure_future
^
SyntaxError: invalid syntax
Switch to getattr trickery to accomplish the same goal
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
The intended use is to ensure that the implementation is empty, which is
one way to ensure that all connections were properly closed and file
descriptors reclaimed.
Signed-off-by: Wojtek Porczyk <woju@invisiblethingslab.com>
Since 7534c19 it is not possible to register event implementation twice.
Instead, allow for retrieving the current one, should it be needed
afterwards.
Signed-off-by: Wojtek Porczyk <woju@invisiblethingslab.com>
- Descriptor.close() was a dead code, never used.
- TimeoutCallback.close(), as a cleanup function, should have called
super() as last statement, not first
Signed-off-by: Wojtek Porczyk <woju@invisiblethingslab.com>
This was a harmless bug, without any impact, but it is wrong to manage
the collection of callbacks from it's members.
Signed-off-by: Wojtek Porczyk <woju@invisiblethingslab.com>
When the callback causes something that results in changes wrt
registered handles, python aborts iteration.
Relevant error message:
Exception in callback None()
handle: <Handle cancelled>
Traceback (most recent call last):
File "/usr/lib64/python3.5/asyncio/events.py", line 126, in _run
self._callback(*self._args)
File "/usr/lib64/python3.5/site-packages/libvirtaio.py", line 99, in _handle
for callback in self.callbacks.values():
RuntimeError: dictionary changed size during iteration
QubesOS/qubes-issues#2805
Signed-off-by: Wojtek Porczyk <woju@invisiblethingslab.com>
This logging is helpful for tracing problems with unclosed connections
and leaking file descriptors.
Signed-off-by: Wojtek Porczyk <woju@invisiblethingslab.com>
This is usable only on python >= 3.4 (or 3.3 with out-of-tree asyncio),
however it should be harmless for anyone with older python versions.
In simplest case, to have the callbacks queued on the default loop:
>>> import libvirtaio
>>> libvirtaio.virEventRegisterAsyncIOImpl()
The function is not present on non-compatible platforms.
Signed-off-by: Wojtek Porczyk <woju@invisiblethingslab.com>
