sessions.py 文件源码

def acquire_lock(self, path=None):
        """Acquire an exclusive lock on the currently-loaded session data."""
        if path is None:
            path = self._get_file_path()
        path += self.LOCK_SUFFIX
        checker = locking.LockChecker(self.id, self.lock_timeout)
        while not checker.expired():
            try:
                self.lock = lockfile.LockFile(path)
            except lockfile.LockError:
                time.sleep(0.1)
            else:
                break
        self.locked = True
        if self.debug:
            cherrypy.log('Lock acquired.', 'TOOLS.SESSIONS')