35   private function isLocked($storageFile) {  argument
37     return file_exists($storageFile . '.lock');
40   private function createLock($storageFile) {  argument
41     $storageDir = dirname($storageFile);
52     @touch($storageFile . '.lock');
55   private function removeLock($storageFile) {  argument
57     @unlink($storageFile . '.lock');
60   private function waitForLock($storageFile) {  argument
70     } while ($cnt <= $tries && $this->isLocked($storageFile));
71     if ($this->isLocked($storageFile)) {
73       $this->removeLock($storageFile);
89     $storageFile = $this->getCacheFile(md5($key));
93     if ($this->isLocked($storageFile)) {
94       $this->waitForLock($storageFile);
96     if (file_exists($storageFile) && is_readable($storageFile)) {
98 …if (! $expiration || (($mtime = @filemtime($storageFile)) !== false && ($now - $mtime) < $expirati…
99         if (($data = @file_get_contents($storageFile)) !== false) {
110     $storageFile = $this->getCacheFile(md5($key));
111     if ($this->isLocked($storageFile)) {
113       $this->waitForLock($storageFile);
123     $this->createLock($storageFile);
124     if (! @file_put_contents($storageFile, $data)) {
125       $this->removeLock($storageFile);
128     $this->removeLock($storageFile);