From 19806f4ce287333288f4b02e2da5413992e036b1 Mon Sep 17 00:00:00 2001 From: Guido van Rossum Date: Tue, 3 May 1994 14:46:18 +0000 Subject: Module to lock open files using fcntl() --- Lib/lib-old/lockfile.py | 15 +++++++++++++++ Lib/lockfile.py | 15 +++++++++++++++ 2 files changed, 30 insertions(+) create mode 100644 Lib/lib-old/lockfile.py create mode 100644 Lib/lockfile.py diff --git a/Lib/lib-old/lockfile.py b/Lib/lib-old/lockfile.py new file mode 100644 index 0000000..3a251d7 --- /dev/null +++ b/Lib/lib-old/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)) 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)) -- cgit v0.12