static function free_lock($lock)
 {
     $lockfname = TwitterPluginFileAccess::get_cache_prefix() . "_{$lock}.lock";
     @unlink($lockfname);
     // Release the lock
 }
 function log($message)
 {
     if (!PLUGIN_TWITTER_DEBUG) {
         return;
     }
     $fp = fopen(TwitterPluginFileAccess::get_cache_prefix() . '.log', 'a');
     fwrite($fp, date('Y.m.d H:i:s') . " - " . $message . "\n");
     fflush($fp);
     fclose($fp);
 }