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� ��abc @@ s d Z d d l m Z d d l Z d d l Z d d l Z d d l Z d d l Z e e d � sp e j e _ n e e j d � s� e j j e j _ n d d d d d d d d d d d d d g Z d e f d � � YZ d e f d � � YZ d e f d � � YZ d e f d � � YZ d e f d � � YZ d e f d � � YZ d e f d � � YZ d e f d � � YZ d e f d � � YZ d e f d � � YZ d � Z d � Z d � Z d! � Z d d" � Z e e d# � r�d$ d% l! m" Z# e# j$ Z% n d$ d& l! m& Z' e' j( Z% e% Z) d S(' s lockfile.py - Platform-independent advisory file locks. Requires Python 2.5 unless you apply 2.4.diff Locking is done on a per-thread basis instead of a per-process basis. Usage: >>> lock = LockFile('somefile') >>> try: ... lock.acquire() ... except AlreadyLocked: ... print 'somefile', 'is locked already.' ... except LockFailed: ... print 'somefile', 'can\'t be locked.' ... else: ... print 'got lock' got lock >>> print lock.is_locked() True >>> lock.release() >>> lock = LockFile('somefile') >>> print lock.is_locked() False >>> with lock: ... print lock.is_locked() True >>> print lock.is_locked() False >>> lock = LockFile('somefile') >>> # It is okay to lock twice from the same thread... >>> with lock: ... lock.acquire() ... >>> # Though no counter is kept, so you can't unlock multiple times... >>> print lock.is_locked() False Exceptions: Error - base class for other exceptions LockError - base class for all locking exceptions AlreadyLocked - Another thread or process already holds the lock LockFailed - Lock failed for some other reason UnlockError - base class for all unlocking exceptions AlreadyUnlocked - File was not locked. NotMyLock - File was locked but not by the current thread/process i ( t absolute_importNt current_threadt get_namet Errort LockErrort LockTimeoutt AlreadyLockedt LockFailedt UnlockErrort NotLockedt NotMyLockt LinkFileLockt MkdirFileLockt SQLiteFileLockt LockBaset lockedc B@ s e Z d Z RS( sw Base class for other exceptions. >>> try: ... raise Error ... except Exception: ... pass ( t __name__t __module__t __doc__( ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyR J s c B@ s e Z d Z RS( s� Base class for error arising from attempts to acquire the lock. >>> try: ... raise LockError ... except Error: ... pass ( R R R ( ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyR V s c B@ s e Z d Z RS( s� Raised when lock creation fails within a user-defined period of time. >>> try: ... raise LockTimeout ... except LockError: ... pass ( R R R ( ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyR b s c B@ s e Z d Z RS( s� Some other thread/process is locking the file. >>> try: ... raise AlreadyLocked ... except LockError: ... pass ( R R R ( ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyR m s c B@ s e Z d Z RS( s� Lock file creation failed for some other reason. >>> try: ... raise LockFailed ... except LockError: ... pass ( R R R ( ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyR x s c B@ s e Z d Z RS( s� Base class for errors arising from attempts to release the lock. >>> try: ... raise UnlockError ... except Error: ... pass ( R R R ( ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyR � s c B@ s e Z d Z RS( s� Raised when an attempt is made to unlock an unlocked file. >>> try: ... raise NotLocked ... except UnlockError: ... pass ( R R R ( ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyR � s c B@ s e Z d Z RS( s� Raised when an attempt is made to unlock a file someone else locked. >>> try: ... raise NotMyLock ... except UnlockError: ... pass ( R R R ( ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyR � s t _SharedBasec B@ sA e Z d � Z d d � Z d � Z d � Z d � Z d � Z RS( c C@ s | | _ d S( N( t path( t selfR ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyt __init__� s c C@ s t d � � d S( s� Acquire the lock. * If timeout is omitted (or None), wait forever trying to lock the file. * If timeout > 0, try to acquire the lock for that many seconds. If the lock period expires and the file is still locked, raise LockTimeout. * If timeout <= 0, raise AlreadyLocked immediately if the file is already locked. s implement in subclassN( t NotImplemented( R t timeout( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyt acquire� s c C@ s t d � � d S( sX Release the lock. If the file is not locked, raise NotLocked. s implement in subclassN( R ( R ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyt release� s c C@ s | j � | S( s* Context manager support. ( R ( R ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyt __enter__� s c G@ s | j � d S( s* Context manager support. N( R ( R t _exc( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyt __exit__� s c C@ s d | j j | j f S( Ns <%s: %r>( t __class__R R ( R ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyt __repr__� s N( R R R t NoneR R R R R ( ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyR � s c B@ sA e Z d Z e d d � Z d � Z d � Z d � Z d � Z RS( s. Base class for platform-specific lock classes.c C@ s� t t | � j | � t j j | � d | _ t j � | _ t j � | _ | r� t j � } t | d t | � � } d | d @| _ n d | _ t j j | j � } t j j | d | j | j | j t | j � f � | _ | | _ d S( si >>> lock = LockBase('somefile') >>> lock = LockBase('somefile', threaded=False) s .lockt idents -%xI���� t s %s%s.%s%sN( t superR R t osR t abspatht lock_filet sockett gethostnamet hostnamet getpidt pidt threadingR t getattrt hasht tnamet dirnamet joint unique_nameR ( R R t threadedR t tR! R0 ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyR � s c C@ s t d � � d S( s9 Tell whether or not the file is locked. s implement in subclassN( R ( R ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyt is_locked� s c C@ s t d � � d S( sA Return True if this object is locking the file. s implement in subclassN( R ( R ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyt i_am_locking� s c C@ s t d � � d S( sN Remove a lock. Useful if a locking thread failed to unlock. s implement in subclassN( R ( R ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyt break_lock s c C@ s d | j j | j | j f S( Ns <%s: %r -- %r>( R R R2 R ( R ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyR s N( R R R t TrueR R R5 R6 R7 R ( ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyR � s ! c O@ sm t j d | t d d �t | d t � s: | d } n t | � d k r` | r` t | d <n | | | � S( Ns1 Import from %s module instead of lockfile packaget stackleveli i i R3 ( t warningst warnt DeprecationWarningt isinstancet strt lenR8 ( t clst modt argst kwds( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyt _fl_helper s c O@ s& d d l m } t | j d | | � S( s� Factory function provided for backwards compatibility. Do not use in new code. Instead, import LinkLockFile from the lockfile.linklockfile module. i ( t linklockfiles lockfile.linklockfile( R" RE RD t LinkLockFile( RB RC RE ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyR s c O@ s& d d l m } t | j d | | � S( s� Factory function provided for backwards compatibility. Do not use in new code. Instead, import MkdirLockFile from the lockfile.mkdirlockfile module. i ( t mkdirlockfiles lockfile.mkdirlockfile( R" RG RD t MkdirLockFile( RB RC RG ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyR % s c O@ s& d d l m } t | j d | | � S( s� Factory function provided for backwards compatibility. Do not use in new code. Instead, import SQLiteLockFile from the lockfile.mkdirlockfile module. i ( t sqlitelockfiles lockfile.sqlitelockfile( R" RI RD t SQLiteLockFile( RB RC RI ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyR 0 s c @ s � � f d � } | S( s Decorator which enables locks for decorated function. Arguments: - path: path for lockfile. - timeout (optional): Timeout for acquiring lock. Usage: @locked('/var/run/myname', timeout=0) def myname(...): ... c @ s( t j � � � � � f d � � } | S( Nc @ s? t � d � �} | j � z � | | � SWd | j � Xd S( NR ( t FileLockR R ( RB t kwargst lock( t funcR R ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyt wrapperH s ( t functoolst wraps( RN RO ( R R ( RN sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyt decorG s $( ( R R RR ( ( R R sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyR ; s t linki ( RE ( RG (* R t __future__R RP R$ R' R, R: t hasattrt currentThreadR t Threadt getNameR t __all__t ExceptionR R R R R R R R t objectR R RD R R R R R R" RE t _llfRF t LockFileRG t _mlfRH RK ( ( ( sA /usr/lib/python2.7/site-packages/pip/_vendor/lockfile/__init__.pyt <module>4 sF -:
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