filelock.py 文件源码

def trylock(fd):
    import fcntl
    import errno
    try:
        fcntl.lockf(fd, fcntl.LOCK_EX | fcntl.LOCK_NB)
    except IOError, e:
        if e.errno in (errno.EACCES, errno.EAGAIN):
            return False
        else:
            raise
    return True