Content - cde9b48c569e6b54522607394dc4e930801e2e0c - 6be7345/Lib/lib-old/lockfile.py

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v0.5.1

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https://github.com/python/cpython

09 December 2020, 11:06:31 UTC

Tip revision: 4f7f6167d108c0fbc588aaaef1f40eb8fb404891 authored by cvs2svn on 10 March 2005, 04:59:14 UTC
This commit was manufactured by cvs2svn to create tag 'r241c1'.

Tip revision: 4f7f616

lockfile.py

import struct, fcntl

def writelock(f):
    _lock(f, fcntl.F_WRLCK)

def readlock(f):
    _lock(f, fcntl.F_RDLCK)

def unlock(f):
    _lock(f, fcntl.F_UNLCK)

def _lock(f, op):
    dummy = fcntl.fcntl(f.fileno(), fcntl.F_SETLKW,
                        struct.pack('2h8l', op,
                                    0, 0, 0, 0, 0, 0, 0, 0, 0))