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C sb t | t�r| }n8zt| �� �}W n& tttfyF td�| ���Y n0 |dk r^td�|���|S )zl Return a file descriptor from a file object. If
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dd� Zdd� ZdS ) r a/ Abstract Selector class
A selector supports registering file objects to be monitored
for specific I/O events.
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`fileno()` method. An arbitrary object can be attached to the
file object which can be used for example to store context info,
a callback, etc.
A selector can use various implementations (select(), poll(), epoll(),
and kqueue()) depending on the platform. The 'DefaultSelector' class uses
the most efficient implementation for the current platform.
c C s i | _ t| �| _d S r )r r �_mapr r r r r u s zBaseSelector.__init__c C sL z
t |�W S tyF | j�� D ] }|j|u r"|j Y S q"� Y n0 dS )aa Return a file descriptor from a file object.
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have it in our map. Used by unregister() so we can
unregister an object that was previously registered
even if it is closed. It is also used by _SelectorMapping
N)r. r- r �valuesr r �r r �keyr r r r | s
z BaseSelector._fileobj_lookupNc C sb |r|t tB @ r td�|���t|| �|�||�}|j| jv rRtd�||j���|| j|j< |S )z8 Register a file object for a set of events to monitor. zInvalid events: {0!r}z${0!r} (FD {1}) is already registered) r r r- r r r r r r �r r r
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t � �dS )zj Perform the actual selection until some monitored file objects
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and will only use select.select as it's the only selector that allows
directly passing in socket objects rather than registering fds.
See: http://bugs.jython.org/issue1678
https://wiki.python.org/jython/NewSocketModule#socket.fileno.28.29_does_not_return_an_integer
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