| commit | 19806f4ce287333288f4b02e2da5413992e036b1 | [log] [tgz] |
|---|---|---|
| author | Guido van Rossum <guido@python.org> | Tue May 03 14:46:18 1994 +0000 |
| committer | Guido van Rossum <guido@python.org> | Tue May 03 14:46:18 1994 +0000 |
| tree | 43cc4ed2e9ed0cbd3914da000d900c8479411be0 | |
| parent | f13285271f61b05a62fee46c399b84700d1eac49 [diff] [blame] |
Module to lock open files using fcntl()
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))