Je|  dZeZddlZddlZddlmZddlmZddl m Z dZ ddlm Z ejdk(sdd lmZdd lmZdd lmZdd lmZd Zn!dZddlZddlmZdZdZdZdZeZdZdZdZGddZdZddgZy)a Filesystem-based interprocess mutex. Taken from the Twisted project. Distributed under the MIT (Expat) license. Changes by the Spyder Team to the original module: * Rewrite kill Windows function to make it more reliable. * Detect if the process that owns the lock is an Spyder one. Adapted from src/twisted/python/lockfile.py of the `Twisted project `_. N)time)to_binary_string)is_spyder_processc@tttdzS)Ni)strint _uniquefloat@/usr/lib/python3/dist-packages/spyder/utils/external/lockfile.pyuniquer !s s<>D() **r )renament)kill)symlink)readlink)removeFT)wintypesiic<tjj}|jtd|}|dk(ryt j }|j|tj|}|dk(}|j||xs|jtk(S)z/Taken from https://www.madebuild.org/blog/?p=30rF) ctypeswindllkernel32 OpenProcessPROCESS_QUERY_INFORMATIONrDWORDGetExitCodeProcessbyref CloseHandlevalue STILL_ACTIVE)pidrhandle exit_coderetval is_runnings r _is_pid_runningr&8s==))%%&?CH Q;NN$ ,,V-3\\)-DFk V$aggt,,  s*A B;%AB66B;ctjtjj|dtj|y)Nr)r0rr1r2r8)r:s r rmlinkrHus) "'',,x34 r c*eZdZdZdZdZdZdZdZy)FilesystemLocka A mutex. This relies on the filesystem property that creating a symlink is an atomic operation and that it will fail if the symlink already exists. Deleting the symlink will release the lock. @ivar name: The name of the file associated with this lock. @ivar clean: Indicates whether this lock was released cleanly by its last owner. Only meaningful after C{lock} has been called and returns True. @ivar locked: Indicates whether the lock is currently held by this object. NFc||_yr()name)selfrLs r __init__zFilesystemLock.__init__s  r c(d} tttj|jd|_||_y#t $r}t r1|jtjtjfvrYd}~y|jtjk(rg t|j}nq#t $r,}|jtjk(r Yd}~Yd}~d}~wt$r2}t r&|jtjk(r Yd}~Yd}~yd}~wwxYw ttt|dt!t|st tj"dn#t $r}|jtj"k(r` t%|jn=#t $r1}|jtjk(rYd}~Yd}~Yd}~d}~wwxYwd}Yd}~Yd}~d}~wwxYwYd}~yd}~wwxYw)z Acquire this lock. @rtype: C{bool} @return: True if the lock is acquired, false otherwise. @raise: Any exception os.symlink() may raise, other than EEXIST. TNFrzNo such process)rrr0getpidrLr)_windowsr*EACCESrCEEXISTrrBr9rrrr+rHlockedclean)rMrUrFr!s r lockzFilesystemLock.locks0 BIIK($))4`DKDJc. ELL%))+D D!77ell*&tyy1"77ell2%H"#5<<(? $)5+ S1-0S:")%++7H"IJ ;"77ekk1& &tyy 1#*&#$77ell#:%-H % &%*E$H !]. s1A H2H H %B;:H ; D)C+!H *C++ D)7#D$H #D$$D))H -A E76H 7 HG>F43G>4 G.=G)G>H (G))G..G>3H =G>>HH  H  Hct|j}t|tjk7rt d|jdt |jd|_y)z Release this lock. This deletes the directory with the given name. @raise: Any exception os.readlink() may raise, or ValueError if the lock is not owned by this process. zLock z not owned by this processFN)rrLrr0rP ValueErrorrHrT)rMr!s r unlockzFilesystemLock.unlocksItyy! s8ryy{ "DIIOP Ptyy r ) __name__ __module__ __qualname____doc__rUrTrNrVrYr r r rJrJ{s#$ E F?B r rJct|}d} |j}|r|j| S#|r|jwwxYw)zDetermine if the lock of the given name is held or not. @type name: C{str} @param name: The filesystem path to the lock to test @rtype: C{bool} @return: True if the lock is held, False otherwise. N)rJrVrY)rLlrEs r isLockedr`sL tA F  HHJ:  HHJ s 4A r`)r]type __metaclass__r*r0rr spyder.py3compatrspyder.utils.programsrr rrLrrrrrHrQrrrr r&openr4rJr`__all__r r r rgs  %-3+ ww$#HH!&L=& E*  ggT& Z (r