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Edit File: lockfile.cpython-310.pyc
o �bZ � @ s� d Z ddlZddlZddlmZ ddlmZ dd� ZddlmZ e� � s3ddlm Z m Z m Z mZ d Zn0d Zz ddlZdd lmZ W n eyL dZ Y n w d Zd Zdd� Z eZdd� Zdd� Z dd� Z G dd� d�Zdd� ZddgZdS )z& Filesystem-based interprocess mutex. � N)�time)�platformc C s t tt� d ��S )Ni� )�str�int� _uniquefloat� r r �9/usr/lib/python3/dist-packages/twisted/python/lockfile.py�unique s r )�rename)�kill�readlink�remove�symlinkFT)� OpenProcess� �W c C sj z t dd| � W t d�� tjy4 } z |jd tkr"W Y d }~d S |jd tkr/ttjd ��� d }~ww )Nr z OpenProcess is required to fail.) r � pywintypes�error�args�ERROR_ACCESS_DENIED�ERROR_INVALID_PARAMETER�OSError�errno�ESRCH� RuntimeError)�pid�signal�er r r r 4 s � ��r c C s� |d t � d }tj�|d�}t�|� d}t||��}|�| � |�� W d � n1 s0w Y zt||� W dS t yO t� |� t� |� � w )z� Write a file at C{filename} with the contents of C{value}. See the above comment block as to why this is needed. �.z.newlinkr �wN) r �os�path�join�mkdir�_open�write�flushr � BaseExceptionr �rmdir)�value�filename� newlinkname� newvalname�mode�fr r r r E s � �r c C s� z t tj�| d�d�}W n ty+ } z|jtjks |jtjkr&t|jd��� d}~ww |� |�� }W d � |S 1 s>w Y |S )zq Read the contents of C{filename}. See the above comment block as to why this is needed. r �rN) r$ r r! r" r r �ENOENT�EIO�read)r* �fObjr �resultr r r r ` s �� ��r c C s" t �t j�| d�� t �| � d S )Nr )r r r! r" r( )r* r r r �rmlinkr s r5 c @ s0 e Zd ZdZdZdZdd� Zdd� Zdd � ZdS ) �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 C s || _ d S )N)�name)�selfr7 r r r �__init__� s zFilesystemLock.__init__c C s� d} z t tt�� �| j� W n� ty� } z�tr)|jtjtj fv r)W Y d}~dS |jtj kr�zt | j�}W n2 tyh } z&|jtj krOW Y d}~W Y d}~qtrc|jtjkrcW Y d}~W Y d}~dS � d}~ww z t durut t|�d� W nK ty� } z?|jtjkr�zt| j� W n# ty� } z|jtj kr�W Y d}~W Y d}~W Y d}~q� d}~ww d}W Y d}~W Y d}~q� d}~ww W Y d}~dS � d}~ww d| _|| _dS )z� Acquire this lock. @rtype: C{bool} @return: True if the lock is acquired, false otherwise. @raise OSError: Any exception L{os.symlink()} may raise, other than L{errno.EEXIST}. TNFr )r r r �getpidr7 r �_windowsr �EACCESr1 �EEXISTr r0 r r r r5 �locked�clean)r8 r? r r r r r �lock� sX �� � ������+zFilesystemLock.lockc C s@ t | j�}t|�t�� krtd| j�d���t| j� d| _dS )z� Release this lock. This deletes the directory with the given name. @raise OSError: Any exception L{os.readlink()} may raise. @raise ValueError: If the lock is not owned by this process. zLock z not owned by this processFN)r r7 r r r: � ValueErrorr5 r> )r8 r r r r �unlock� s zFilesystemLock.unlock) �__name__� __module__� __qualname__�__doc__r? r> r9 r@ rB r r r r r6 w s =r6 c C s: t | �}d}z|�� }W |r|�� | S |r |�� w w )z� Determine 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)r6 r@ rB )r7 �lr4 r r r �isLocked� s � �rH )rF r r r r �twisted.python.runtimer r r � isWindowsr r r r5 r r; r �win32apir � ImportErrorr r �openr$ r6 rH �__all__r r r r �<module> s6 � f