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c C s i | _ d | _d S r )r) �_saved_sighandlerr� r r r r z s z MultiLoopChildWatcher.__init__c C s
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z&ThreadedChildWatcher.add_child_handlerc C s dS r� r r r r r r s z)ThreadedChildWatcher.remove_child_handlerc C s d S r r r r r r r s z ThreadedChildWatcher.attach_loopc C s� |dks t �zt�|d�\}}W n( tk
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z$_UnixDefaultEventLoopPolicy.__init__c C sH t j�8 | jd kr:t� | _tt�� tj�r:| j�| j j
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�z)_UnixDefaultEventLoopPolicy._init_watcherc s6 t � �|� | jdk r2tt�� tj�r2| j�|� dS )z�Set the event loop.
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�z*_UnixDefaultEventLoopPolicy.set_event_loopc C s | j dkr| �� | j S )z~Get the watcher for child processes.
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z-_UnixDefaultEventLoopPolicy.get_child_watcherc C s4 |dkst |t�st�| jdk r*| j�� || _dS )z$Set the watcher for child processes.N)rO r rw rX r% )r rj r r r �set_child_watchere s
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