U ҥcv@sdZz ddlZWnek r(dZYnXddlZddlZddlZddlZddlZddlm Z ddl m Z ddl m Z Gddde ZGdd d e ZdS) zA parent poller for unix.N)interrupt_main)Thread) get_loggercs(eZdZdZfddZddZZS)ParentPollerUnixzxA Unix-specific daemon thread that terminates the program immediately when the parent process no longer exists. cstd|_dS)zInitialize the poller.TN)super__init__daemon)self __class__5lib/python3.8/site-packages/ipykernel/parentpoller.pyrs zParentPollerUnix.__init__c Cszddlm}z0tdkr0tdtdtdWq t k rr}z|j|kr`WYq W5d}~XYq Xq dS)zRun the poller.r)EINTR-Parent appears to have exited, shutting down.g?N) errnorosgetppidrwarning_exittimesleepOSError)r rer r r runs     zParentPollerUnix.run__name__ __module__ __qualname____doc__rr __classcell__r r r r rs rcs*eZdZdZdfdd ZddZZS)ParentPollerWindowszA Windows-specific daemon thread that listens for a special event that signals an interrupt and, optionally, terminates the program immediately when the parent process no longer exists. Ncs@|s |s tttdkr*d}t|d|_||_||_dS)aCreate the poller. At least one of the optional parameters must be provided. Parameters ---------- interrupt_handle : HANDLE (int), optional If provided, the program will generate a Ctrl+C event when this handle is signaled. parent_handle : HANDLE (int), optional If provided, the program will terminate immediately when this handle is signaled. Nz#ParentPollerWindows requires ctypesT)AssertionErrorrrctypes ImportErrorrinterrupt_handle parent_handle)r r%r&msgr r r r5s  zParentPollerWindows.__init__cCs4zddlm}m}Wn$tk r8ddlm}m}YnXg}|jrP||j|jrb||jt d}| dr~t j nt j }t jjt||t||d|}||krt|krnnR|||}||jkrtttjrtn"||jkr.tdtdq|dkrtddSqdS) z-Run the poll loop. This method never returns.r)INFINITE WAIT_OBJECT_0Z64FrrzParent poll failed. If the frontend dies, the kernel may be left running. Please let us know about your system (bitness, Python, etc.) at ipython-dev@scipy.orgN)Z_winapir(r)r$Z _subprocessr%appendr&platformZ architecture startswithr#Zc_int64c_intZwindllZkernel32ZWaitForMultipleObjectslencallablesignal getsignalSIGINTrrrrrwarningswarn)r r(r)ZhandlesZarchr-resultZhandler r r rKs<        zParentPollerWindows.run)NNrr r r r r!/sr!)rr#r$rr+r0rr3_threadr threadingrZ traitlets.logrrr!r r r r s