[OpenSPARC-T2-SAM] / sam-t2 / devtools / amd64 / lib / python2.4 / lib-old / lockfile.py

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))
Commit	Line	Data
920dae64 AT	1	import struct, fcntl
	2
	3	def writelock(f):
	4	_lock(f, fcntl.F_WRLCK)
	5
	6	def readlock(f):
	7	_lock(f, fcntl.F_RDLCK)
	8
	9	def unlock(f):
	10	_lock(f, fcntl.F_UNLCK)
	11
	12	def _lock(f, op):
	13	dummy = fcntl.fcntl(f.fileno(), fcntl.F_SETLKW,
	14	struct.pack('2h8l', op,
	15	0, 0, 0, 0, 0, 0, 0, 0, 0))