a ;`6@sdZdZddlZddlZddlZddlZddlmZddlm Z ddlm Z ddlm Z ej Z ej Z ejZejZejdZGd d d ZeZd d Zd dZddZddZddZddZddddZz ddlZWneyYn 0ejZZdS)z.A Future class similar to the one in PEP 3148.)Future wrap_futureisfutureN) base_futures)events) exceptions)format_helpersc@seZdZdZeZdZdZdZdZ dZ dZ dZ dZ ddddZejZddZd d Zd d Zed dZejddZddZddZd+ddZddZddZddZddZddZdd d!d"Z d#d$Z!d%d&Z"d'd(Z#d)d*Z$e$Z%dS),ra,This class is *almost* compatible with concurrent.futures.Future. Differences: - This class is not thread-safe. - result() and exception() do not take a timeout argument and raise an exception when the future isn't done yet. - Callbacks registered with add_done_callback() are always called via the event loop's call_soon(). - This class is not compatible with the wait() and as_completed() methods in the concurrent.futures package. (In Python 3.4 or later we may be able to unify the implementations.) 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The other Future may be a concurrent.futures.Future. N)rCrBr=r!rWrhrGrS)ridestr!rGrrr_copy_future_stateVs   rlcststtjjstdts._set_statecs2|r.dusur"n jdSr()rBr=call_soon_threadsafe) destination) dest_loopri source_looprr_call_check_cancels z)_chain_future.._call_check_cancelcsJrdurrdSdus,ur8|n|dSr()rBZ is_closedro)ri)rnrqrprrrr_call_set_states z&_chain_future.._call_set_state)rrTrdrerrVrbrK)rirprsrtr)rnrqrprirrr _chain_futurejs   rur cCsNt|r |St|tjjs(Jd||dur8t}|}t|||S)z&Wrap concurrent.futures.Future object.z+concurrent.futures.Future is expected, got N) rrTrdrerrr Z create_futureru)r"r Z new_futurerrrrs r)r\__all__Zconcurrent.futuresrdrHZloggingrrrrr rr9r:rDDEBUGZ STACK_DEBUGrZ _PyFuturerbrcrhrjrlrurZ_asyncio ImportErrorZ_CFuturerrrrs<        *