ԋgX!ddlmZddlZddlZddlZddlmZddlmZddl m Z ddl m Z m Z mZddlmZej"eZGdd ZGd d Zy) ) annotationsN) defaultdict)suppress)parse_timedelta) TimeoutError log_errorswait_for) get_clientcjeZdZdZdZed dZed dZed dZed dZ dZ d Z y) EventExtensionaAn extension for the scheduler to manage Events This adds the following routes to the scheduler * event_wait * event_set * event_clear * event_is_set In principle, the implementation logic is quite simple as we can reuse the asyncio.Event as much as possible: we keep a mapping from name to an asyncio.Event and call every function (wait, set, clear, is_set) directly on these events. However, this would cause a memory leak: created events in the dictionary are never removed. For this, we also keep a counter for the number of waiters on a specific event. If an event is set, we need to keep track of this state so we can not remove it (the default flag is false). If it is unset but there are waiters, we can also not remove it, as those waiters would then have dangling futures. Therefore the only time we can remove the event from our dict is when the number of waiters is 0 and the event flag is cleared. c||_ttj|_tt |_|jjj|j|j|j|jdy)N) event_wait event_set event_clear event_is_set) schedulerrasyncioEvent_eventsint _waiter_counthandlersupdaterrrr)selfrs 1lib/python3.12/site-packages/distributed/event.py__init__zEventExtension.__init__-se""7==1 )- &&"oo!^^#// $ 1 1   NcK|j|}|j|}|j}| t||}|j|xxdz cc< |d{ |j|xxdzcc<|j|s!|j s|j|y7M#t $rLY|j|xxdzcc<|j|s#|j s|j|yyywxYw#|j|xxdzcc<|j|s#|j s|j|wwwxYww)zWait until the event is set to true. Returns false, when this did not happen in the given time and true otherwise. NFT)_normalize_namerwaitr rris_set _delete_event)rnametimeouteventfutures rrzEventExtension.event_wait>sI ##D) T"  fg.F 4 A%  )LL   t $ ) $%%d+ELLN""4(     t $ ) $%%d+ELLN""4( 5C+     t $ ) $%%d+ELLN""4( 5C+sQAEB.B,B.$AE,B.. D7D8A EDDA EEc`|j|}|j|jy)zhSet the event with the given name to true. All waiters on this event will be notified. N)r rsetrr$s rrzEventExtension.event_set[s+ ##D) T rc|j|}|j|s|j|y||jvsJ|j|}|j y)z+Set the event with the given name to false.N)r rr#rclear)rr$r&s rrzEventExtension.event_clearfs]##D)!!$'   t $4<<' ''LL&E KKMrc||j|}||jvry|j|jS)NF)r rr"r*s rrzEventExtension.event_is_set{s;##D) t|| #||D!((**rc<t|tr t|}|S)z*Helper function to normalize an event name) isinstancelisttupler*s rr zEventExtension._normalize_names dD !;D rctt5|j|=dddtt5|j|=dddy#1swY/xYw#1swYyxYw)z"Helper function to delete an eventN)rKeyErrorrrr*s rr#zEventExtension._delete_eventsKh ""4( h  T"    sA A AA!NNN) __name__ __module__ __qualname____doc__rrrrrrr r#rrr r sf6 "8!!( + +#rr cTeZdZdZd dZedZdZdZd dZ dZ d Z d Z d Z y)raDistributed Centralized Event equivalent to asyncio.Event An event stores a single flag, which is set to false on start. The flag can be set to true (using the set() call) or back to false (with the clear() call). Every call to wait() blocks until the event flag is set to true. Parameters ---------- name: string (optional) Name of the event. Choosing the same name allows two disconnected processes to coordinate an event. If not given, a random name will be generated. client: Client (optional) Client to use for communication with the scheduler. If not given, the default global client will be used. Examples -------- >>> event_1 = Event('a') # doctest: +SKIP >>> event_1.wait(timeout=1) # doctest: +SKIP >>> # in another process >>> event_2 = Event('a') # doctest: +SKIP >>> event_2.set() # doctest: +SKIP >>> # now event_1 will stop waiting Ncf||_|xs!dtjjz|_y)Nzevent-)_clientuuiduuid4hexr$)rr$clients rrzEvent.__init__s& 7Htzz|'7'77 rc|js t|_|jS|jS#t$rY|jSwxYwr5)r=r ValueErrorrs rrAz Event.clientsJ|| )| ||t|| || s5 A  A c8fd}|jS)zasync constructor Make it possible to write >>> event = await Event("x") # doctest: +SKIP even though no waiting is implied cKSwr5r:rDsr_zEvent.__await__.._s Ks) __await__)rrGs` rrHzEvent.__await__s s}}rcJ|jstt|dy)Nz object not properly initialized. This can happen if the object is being deserialized outside of the context of a Client or Worker.)rA RuntimeErrortyperDs r_verify_runningzEvent._verify_runnings.{{:,'' rc|jt|}|jj|jjj |j |}|S)aWait until the event is set. Parameters ---------- timeout : number or string or timedelta, optional Seconds to wait on the event in the scheduler. This does not include local coroutine time, network transfer time, etc.. Instead of number of seconds, it is also possible to specify a timedelta in string format, e.g. "200ms". Examples -------- >>> event = Event('a') # doctest: +SKIP >>> event.wait(timeout="1s") # doctest: +SKIP Returns ------- True if the event was set of false, if a timeout happened )r$r%)rLrrAsyncrrr$)rr%results rr!z Event.waitsU( !'*!! KK ! ! , ,499g"  rc|j|jj|jjj|j S)zVClear the event (set its flag to false). All waiters will now block. r$)rLrArNrrr$rDs rr,z Event.clears> {{ 5 5 A A RRrc|j|jj|jjj|j }|S)zZSet the event (set its flag to false). All waiters will now be released. rQ)rLrArNrrr$rrOs rr)z Event.setsB !!$++"7"7"A"A !R rc|j|jj|jjj|j }|S)zCheck if the event is setrQ)rLrArNrrr$rSs rr"z Event.is_sets@ !!$++"7"7"D"D499!U rc(t|jffSr5)rr$rDs r __reduce__zEvent.__reduce__ s |$$rr4r5)r6r7r8r9rpropertyrArHrLr!r,r)r"rVr:rrrrsD68 8S %rr) __future__rrloggingr> collectionsr contextlibr dask.utilsrdistributed.utilsrrr distributed.workerr getLoggerr6loggerr rr:rrrasN" #&@@)   8 $D#D#Nt%t%r