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dS )r aH Abstract base class for monitoring child processes.
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z$_UnixDefaultEventLoopPolicy.__init__c C sH t j�8 | jd kr:t� | _tt�� tj�r:| j�| j j
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�z)_UnixDefaultEventLoopPolicy._init_watcherc s6 t � �|� | jdk r2tt�� tj�r2| j�|� dS )z�Set the event loop.
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�z*_UnixDefaultEventLoopPolicy.set_event_loopc C s | j dkr| �� | j S )z~Get the watcher for child processes.
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z-_UnixDefaultEventLoopPolicy.get_child_watcherc C s | j dk r| j �� || _ dS )z$Set the watcher for child processes.N)rU r% )r rj r r r �set_child_watchere s
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