Edit File: _lru_cache.cpython-37.pyc
B *��]� � @ sH d Z ddlmZ ddlmZ ddlmZ eddddd g�Zdd d �Zd S )z� LRU cache implementation for Python 2.7 Ported from http://code.activestate.com/recipes/578078/ and simplified for our use (only support maxsize > 0 and positional arguments). � )� namedtuple)�update_wrapper)�RLock� CacheInfo�hits�misses�maxsize�currsize�d c s � fdd�}|S )z�Least-recently-used cache decorator. Arguments to the cached function must be hashable. See: http://en.wikipedia.org/wiki/Cache_algorithms#Least_Recently_Used c s� t � �ddg� d\� ��j�t�t� � g }||d d g|d d �< |g� d\����� r\� dkshtd� ��� ��������� � � � � fdd�}� ��� � � fdd�}�� � � fd d �}� |_||_||_t|� �S ) Nr )r � )r r � � zmaxsize %s not supportedc sB | }� �t �|�}|d k rx� \}|\}}}}||�< ||�< |� }| |�< |�< ||�< ||�< � � d7 < |S W d Q R X � | � }� �� � \}|�kr�n����� kr�|}||�< ||�< |� }� d< |� } d |�< |�< �| = |�|< n,|� }||||g}| |�< |�< �|< � � d7 < W d Q R X |S )Nr r � ) �args�key�link�rootZ link_prevZ link_next�result�lastZoldrootZoldkey)�HITS�KEY�MISSES�NEXT�PREV�RESULT�_len�cache� cache_get�lockr � nonlocal_root�stats� user_functionr �F/opt/alt/python37/lib64/python3.7/site-packages/psycopg2/_lru_cache.py�wrapper& sB z7lru_cache.<locals>.decorating_function.<locals>.wrapperc s* �� t �� �� �t���S Q R X dS )zReport cache statisticsN)� _CacheInfo�lenr )r r r r r r r r" � cache_infoV s z:lru_cache.<locals>.decorating_function.<locals>.cache_infoc sH ��: � � � �d } | | ddg| dd�< ddg�dd�< W dQ R X dS )z$Clear the cache and cache statisticsr N)�clear)r )r r r r r r" � cache_clear[ s z;lru_cache.<locals>.decorating_function.<locals>.cache_clear) �dict�getr% r �AssertionError� __wrapped__r& r( r )r! r r# r& r( )r ) r r r r r r r r r r r r r! r" �decorating_function s$ &0z&lru_cache.<locals>.decorating_functionr )r r- r )r r" � lru_cache s Qr. N)r ) �__doc__� collectionsr � functoolsr � threadingr r$ r. r r r r" �<module> s