File: lockfile.py

package info (click to toggle)
jython 2.2.1-2
  • links: PTS
  • area: main
  • in suites: lenny
  • size: 18,708 kB
  • ctags: 46,200
  • sloc: python: 150,937; java: 86,267; xml: 1,080; perl: 104; sh: 93; makefile: 81; ansic: 24
file content (15 lines) | stat: -rw-r--r-- 281 bytes parent folder | download | duplicates (4) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
 
import struct, 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))