��UV\
� @ sp d d l m Z d d l Z d d l Z d d l m Z m Z m Z m Z m Z m
Z
Gd d � d e � Z d S)� )�absolute_importN� )�LockBase�
LockFailed� NotLocked� NotMyLock� LockTimeout�
AlreadyLockedc @ sU e Z d Z d Z d d d � Z d d � Z d d � Z d d
� Z d d � Z d S)
� LinkLockFilez�Lock access to a file using atomic property of link(2).
>>> lock = LinkLockFile('somefile')
>>> lock = LinkLockFile('somefile', threaded=False)
Nc C st y t | j d � j � Wn% t k
rA t d | j � � Yn X| d k rT | n | j } t j � } | d k r� | d k r� | | 7} x� y t j | j | j � Wn� t
k
rgt j | j � j } | d k r� d S| d k r@t j � | k r@t j
| j � | d k r-t d | j � � n t d | j � � t j | d k r\| d p_d � Yq� Xd Sq� Wd S) N�wbzfailed to create %sr � z&Timeout waiting to acquire lock for %sz%s is already locked�
g�������?)�open� unique_name�close�IOErrorr �timeout�time�os�link� lock_file�OSError�stat�st_nlink�unlinkr �pathr �sleep)�selfr �end_timeZnlinks� r �/linklockfile.py�acquire s0
(zLinkLockFile.acquirec C sn | j � s" t d | j � � n( t j j | j � sJ t d | j � � t j | j � t j | j � d S)Nz%s is not lockedz%s is locked, but not by me) � is_lockedr r r �existsr r r r )r r r r �release7 s zLinkLockFile.releasec C s t j j | j � S)N)r r r# r )r r r r r" ? s zLinkLockFile.is_lockedc C s: | j � o9 t j j | j � o9 t j | j � j d k S)Nr )r" r r r# r r r )r r r r � i_am_lockingB s zLinkLockFile.i_am_lockingc C s) t j j | j � r% t j | j � d S)N)r r r# r r )r r r r �
break_lockG s zLinkLockFile.break_lock) �__name__�
__module__� __qualname__�__doc__r! r$ r" r% r& r r r r r
s & r
) Z
__future__r r r � r r r r r r r
r r r r �<module> s .| Name | Type | Size | Permission | Actions |
|---|---|---|---|---|
| __init__.cpython-35.opt-1.pyc | File | 10 KB | 0644 |
|
| __init__.cpython-35.pyc | File | 10 KB | 0644 |
|
| linklockfile.cpython-35.opt-1.pyc | File | 2.34 KB | 0644 |
|
| linklockfile.cpython-35.pyc | File | 2.34 KB | 0644 |
|
| mkdirlockfile.cpython-35.opt-1.pyc | File | 2.75 KB | 0644 |
|
| mkdirlockfile.cpython-35.pyc | File | 2.75 KB | 0644 |
|
| pidlockfile.cpython-35.opt-1.pyc | File | 4.91 KB | 0644 |
|
| pidlockfile.cpython-35.pyc | File | 4.91 KB | 0644 |
|
| sqlitelockfile.cpython-35.opt-1.pyc | File | 3.92 KB | 0644 |
|
| sqlitelockfile.cpython-35.pyc | File | 3.92 KB | 0644 |
|
| symlinklockfile.cpython-35.opt-1.pyc | File | 2.21 KB | 0644 |
|
| symlinklockfile.cpython-35.pyc | File | 2.21 KB | 0644 |
|