local_mutex

本地锁,通过fcntl针对文件加锁实现的. 需要强烈注意的是,多线程下是无效的,原因? 查看链接

Install:

source install

python setup.py install

pypi install

pip install local_mutex

Usage:

最简单的例子,适合一个程序同时跑一个的场景.

import sys
from local_mutex import LocalMutex

try:
    lock = LocalMutex('app.lock')
except LockError:
    sys.exit('already running')

try:
    print 'doing'
finally:
    lock.release()

使用wait参数不停的试图获取Lock, 直到获取锁.

lock = LocalMutex('/var/run/app.lock', wait = True)
try:
    print 'doing'
finally:
    lock.release()

使用with关键词

with LocalMutex('app.lock', wait = True):
    print 'doing'

如果是多线程环境,直接用threading的Lock

import threading
lock = threading.Lock()
with lock:
    pass

END