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r_ t d j | � � � n X| d k r� t d j | � � � n | S( sl Return a file descriptor from a file object. If
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r_ } d } t | d � rP | j } n t | � � n Xd S( s� This is the short-circuit version of the below logic
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A selector supports registering file objects to be monitored
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A file object is a file descriptor or any object with a
`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.
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and kqueue()) depending on the platform. The 'DefaultSelector' class uses
the most efficient implementation for the current platform.
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rT x- | j j � D] } | j | k r. | j Sq. W� n Xd S( sa 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
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t � � d S( sj Perform the actual selection until some monitored file objects
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Checks that select structs can be allocated by the underlying
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