Initial commit of OpenSPARC T2 architecture model.

[OpenSPARC-T2-SAM] / sam-t2 / devtools / v9 / 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))