34   private function isLocked($key) {  argument
35     if ((@apc_fetch($key . '.lock')) === false) {
41   private function createLock($key) {  argument
44     @apc_add($key . '.lock', '', 5);
47   private function removeLock($key) {  argument
49     @apc_delete($key . '.lock');
52   private function waitForLock($key) {  argument
60     } while ($cnt <= $tries && $this->isLocked($key));
61     if ($this->isLocked($key)) {
63       $this->removeLock($key);
70   public function get($key, $expiration = false) {  argument
72     if (($ret = @apc_fetch($key)) === false) {
76       $this->delete($key);
85   public function set($key, $value) {  argument
86     if (@apc_store($key, array('time' => time(), 'data' => serialize($value))) == false) {
93    * @param String $key
95   public function delete($key) {  argument
96     @apc_delete($key);