Module to lock open files using fcntl()

19806f4c · Guido van Rossum · f1328527 · 19806f4c · 19806f4c
Kaydet (Commit) 19806f4c authored May 03, 1994 tarafından Guido van Rossum
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lockfile.py Lib/lib-old/lockfile.py +15 -0

lockfile.py Lib/lockfile.py +15 -0

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--- a/Lib/lib-old/lockfile.py
+++ b/Lib/lib-old/lockfile.py
+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))
--- a/Lib/lockfile.py
+++ b/Lib/lockfile.py
+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))