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Improves fcntl.flock usage

Project description

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Improves fcntl.flock usage.

flock is a Unix command for file locking, the mecanism that controls access restrictions of files.

Usage

Exclusive blocking lock:

from flockcontext import FlockOpen

with FlockOpen('/tmp/my.lock', 'w') as lock:
    lock.fd.write('Locked\n')

Exclusive non-blocking lock:

from flockcontext import FlockOpen

try:
    with FlockOpen('/tmp/my.lock', 'w', blocking=False) as lock:
        lock.fd.write('Locked\n')
except IOError as e:
    print('Can not acquire lock')

Shared blocking lock:

from flockcontext import Flock

with FlockOpen('/tmp/my.lock', 'w', exclusive=False) as lock:
    lock.fd.write('Locked\n')

Acquire and release within context:

from flockcontext import FlockOpen

with FlockOpen('/tmp/my.lock', 'w') as lock:
    print('Lock acquired')
    lock.fd.write('Locked\n')

    lock.release()
    print('Lock released')

    lock.acquire()
    print('Lock acquired')
    lock.fd.write('Locked\n')

Locking alredy opened file:

from flockcontext import Flock

with open('/tmp/my.lock', 'w') as fd:
    with Flock(fd):
        fd.write('Locked\n')

License

  • Free software: BSD license

History

0.3.1 (2015-08-24)

  • Add syntax highlighting for code exemples
  • Add Flock manager exemple in README

0.3.0 (2015-08-21)

  • Add FlockOpen context manager.

0.2.0 (2015-08-20)

  • Add Flock relase and acquire capability withing context.

0.1.0 (2015-08-19)

  • Add Flock context manager.

Project details


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Filename, size & hash SHA256 hash help File type Python version Upload date
flockcontext-0.3.1-py2.py3-none-any.whl (5.2 kB) Copy SHA256 hash SHA256 Wheel 3.4 Aug 24, 2015
flockcontext-0.3.1.tar.gz (13.5 kB) Copy SHA256 hash SHA256 Source None Aug 24, 2015

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