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Module to lock open files using fcntl()

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This commit is contained in:
Guido van Rossum 1994-05-03 14:46:18 +00:00
parent f13285271f
commit 19806f4ce2
2 changed files with 30 additions and 0 deletions
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15
Lib/lib-old/lockfile.py Normal file
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import struct, fcntl, 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))

15
Lib/lockfile.py Normal file
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@ -0,0 +1,15 @@
import struct, fcntl, 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))