1 files changed, 15 insertions, 0 deletions
diff --git a/Lib/lockfile.py b/Lib/lockfile.py
new file mode 100644
index 0000000..3a251d7
--- /dev/null
+++ b/Lib/lockfile.py
@@ -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))