home *** CD-ROM | disk | FTP | other *** search
/ MacHack 2000 / MacHack 2000.toast / pc / The Hacks / MacHacksBug / Python 1.5.2c1 / Lib / lib-old / lockfile.py < prev    next >
Encoding:
Text File  |  2000-06-23  |  288 b   |  16 lines
  1. import struct, fcntl, 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))
  16.