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The solution is safe but it has a significant overhead when handling a big number of processes (*O(n)* each time a SIGCHLD is received). cCsi|_d|_dSr)r1_saved_sighandlerrrrrrszMultiLoopChildWatcher.__init__cCs |jduSr)rZrrrrr`szMultiLoopChildWatcher.is_activecCsT|j|jdurdSttj}||jkr:tdnttj|jd|_dS)Nz+SIGCHLD handler was changed by outside code) r1r/rZr< getsignalrKrLr r)r!rRrrrr's     zMultiLoopChildWatcher.closecCs|Srrrrrrr*szMultiLoopChildWatcher.__enter__cCsdSrrr!r2exc_valexc_tbrrrr/szMultiLoopChildWatcher.__exit__cGs&t}|||f|j|<||dSr)rget_running_loopr1rI)r!rsrHrIrrrrrcsz'MultiLoopChildWatcher.add_child_handlercCs(z|j|=WdSty"YdS0dSrNrOr&rrrr's  z*MultiLoopChildWatcher.remove_child_handlercCsN|jdurdSttj|j|_|jdurrN is_closedrrrr) r!rHrsrBrtZ debug_logrrHrIrrrrIs6     z!MultiLoopChildWatcher._do_waitpidc CsHz |Wn6ttfy$Yn tyBtjdddYn0dS)NrMTr)rJrerfrgr r)r!rrrrrrL)s   zMultiLoopChildWatcher._sig_chldN)rrrrrr`r'r*r/rcr'r)rJrIrLrrrrrs %rc@sneZdZdZddZddZddZdd Zd d Zd d Z e j fddZ ddZ ddZddZddZdS)raAThreaded child watcher implementation. 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The watcher has O(1) complexity, its performance doesn't depend on amount of spawn processes. cCstd|_i|_dSr) itertoolsr _pid_counter_threadsrrrrr?s zThreadedChildWatcher.__init__cCsdSrrrrrrr`CszThreadedChildWatcher.is_activecCs |dSr) _join_threadsrrrrr'FszThreadedChildWatcher.closecCs.ddt|jD}|D] }|qdS)z%Internal: Join all non-daemon threadscSsg|]}|r|js|qSr)is_alivedaemon.0threadrrr Ksz6ThreadedChildWatcher._join_threads..N)r*rdr9r)r!threadsrjrrrreIsz"ThreadedChildWatcher._join_threadscCs|Srrrrrrr*PszThreadedChildWatcher.__enter__cCsdSrrr\rrrr/SszThreadedChildWatcher.__exit__cCs6ddt|jD}|r2||jdt|ddS)NcSsg|]}|r|qSr)rfrhrrrrkWsz0ThreadedChildWatcher.__del__..z0 has registered but not finished child processesr%)r*rdr9r$r.)r!rrlrrrrVs  zThreadedChildWatcher.__del__cGsFt}tj|jdt|j||||fdd}||j|<|dS)Nzwaitpid-T)targetnamerIrg) rr_rUThreadrInextrcrdstart)r!rsrHrIrrjrrrrc^s  z&ThreadedChildWatcher.add_child_handlercCsdSrrr&rrrr'gsz)ThreadedChildWatcher.remove_child_handlercCsdSrrr(rrrr)msz ThreadedChildWatcher.attach_loopcCszt|d\}}Wn&ty:|}d}td|Yn 0t|}|rZtd|||rrtd||n|j |||g|R|j |dS)Nrr=rQrRr`) r|r?r@r rrArrrarrrdr>)r!rrHrHrIrsrBrtrrrrIps$  z ThreadedChildWatcher._do_waitpidN)rrrrrr`r'rer*r/r,r-rrcr'r)rIrrrrr2s  rcsHeZdZdZeZfddZddZfddZdd Z d d Z Z S) _UnixDefaultEventLoopPolicyz:UNIX event loop policy with a watcher for child processes.cstd|_dSr)rr_watcherrr#rrrs z$_UnixDefaultEventLoopPolicy.__init__cCs\tjB|jdur:t|_ttur:|j|jj Wdn1sN0YdSr) rrWrsrrUcurrent_thread main_threadr)_localrrrrr _init_watchers  z)_UnixDefaultEventLoopPolicy._init_watchercs6t||jdur2ttur2|j|dS)zSet the event loop. As a side effect, if a child watcher was set before, then calling .set_event_loop() from the main thread will call .attach_loop(loop) on the child watcher. N)rset_event_looprsrUrtrur)r(r#rrrxs   z*_UnixDefaultEventLoopPolicy.set_event_loopcCs|jdur||jS)z~Get the watcher for child processes. If not yet set, a ThreadedChildWatcher object is automatically created. N)rsrwrrrrr_s z-_UnixDefaultEventLoopPolicy.get_child_watchercCs|jdur|j||_dS)z$Set the watcher for child processes.N)rsr')r!rorrrset_child_watchers  z-_UnixDefaultEventLoopPolicy.set_child_watcher) rrrrrZ _loop_factoryrrwrxr_ryrrrr#rrrs   rr)3rrFrrbr|rr<r~rrr(rUr,rrrrrrr r r r logr __all__r ImportErrorrZBaseSelectorEventLooprZ ReadTransportrVZ_FlowControlMixinZWriteTransportr]ZBaseSubprocessTransportrbrrrArGrrrrZBaseDefaultEventLoopPolicyrrrrrrrrsb             NON5Ji}Y2