B U[O@sy ddlZWndZYnXddlZddlZddlZddlZyddlmZWn ek rnddlmZYnXddl m Z ddl m Z ddl Z Gddde ZGddde ZdS) N)interrupt_main)Thread) get_loggercs(eZdZdZfddZddZZS)ParentPollerUnixzy A Unix-specific daemon thread that terminates the program immediately when the parent process no longer exists. cstt|d|_dS)NT)superr__init__daemon)self) __class__5lib/python3.7/site-packages/ipykernel/parentpoller.pyrszParentPollerUnix.__init__c Csxddlm}xfy0tdkr2tdtdtdWqt k rn}z|j|kr\wWdd}~XYqXqWdS)Nr)EINTRz-Parent appears to have exited, shutting down.g?) errnor osgetppidrwarning_exittimeZsleepOSError)r r er r r runs     zParentPollerUnix.run)__name__ __module__ __qualname____doc__rr __classcell__r r )r r rs rcs*eZdZdZdfdd ZddZZS)ParentPollerWindowsz A 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 ttt|tdkr*tdd|_||_||_dS)a Create 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) AssertionErrorrrrctypes ImportErrorrinterrupt_handle parent_handle)r r!r")r r r r4s zParentPollerWindows.__init__cCs8yddlm}m}Wn$tk r8ddlm}m}YnXg}|jrP||j|jrb||jt d}| dr~t j nt j }xt jjt||t||d|}||krt|krnnR|||}||jkrtttjrtn"||jkr0tdtdq|dkrtddSqWdS) z7 Run the poll loop. This method never returns. r) WAIT_OBJECT_0INFINITEZ64Fz-Parent appears to have exited, shutting down.rzParent poll failed. If the frontend dies, the kernel may be left running. Please let us know about your system (bitness, Python, etc.) at ipython-dev@scipy.orgN)Z_winapir#r$r Z _subprocessr!appendr"platformZ architecture startswithrZc_int64c_intZwindllZkernel32ZWaitForMultipleObjectslencallablesignal getsignalSIGINTrrrrrwarningswarn)r r#r$ZhandlesZarchr(resultZhandler r r rJs:        zParentPollerWindows.run)NN)rrrrrrrr r )r r r.sr)rrr&r+r_threadrr ZthreadZ threadingrZ traitlets.logrr.rrr r r r s