改进缓存类的remember方法

library/think/cache/Driver.php

@@ -122,6 +122,7 @@ abstract class Driver
         if (!$this->has($name)) {
             while ($this->has($name . '_lock')) {
                 // 存在锁定则等待
+                usleep(100000);
             }
 
             try {
@@ -136,6 +137,8 @@ abstract class Driver
             } catch (\Exception $e) {
                 // 解锁
                 $this->rm($name . '_lock');
+            } catch (\throwable $e) {
+                $this->rm($name . '_lock');
             }
         } else {
             $value = $this->get($name);