mirror of https://github.com/python/cpython
16 lines
288 B
Python
16 lines
288 B
Python
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import struct, fcntl, FCNTL
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def writelock(f):
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_lock(f, FCNTL.F_WRLCK)
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def readlock(f):
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_lock(f, FCNTL.F_RDLCK)
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def unlock(f):
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_lock(f, FCNTL.F_UNLCK)
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def _lock(f, op):
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dummy = fcntl.fcntl(f.fileno(), FCNTL.F_SETLKW,
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struct.pack('2h8l', op,
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0, 0, 0, 0, 0, 0, 0, 0, 0))
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