修复商城2

crmeb/services/LockService.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace crmeb\services;
+
+use Swoole\Coroutine\System;
+use think\facade\Cache;
+
+class LockService
+{
+
+    /**
+     * @param $key
+     * @param $fn
+     * @param int $ex
+     * @throws \Throwable
+     */
+    public function exec($key, $fn, int $ex = 6)
+    {
+        try {
+            $this->lock($key, $key, $ex);
+            return $fn();
+        } finally {
+            $this->unlock($key, $key);
+        }
+    }
+
+    public function tryLock($key, $value = '1', $ex = 6)
+    {
+        return Cache::store('redis')->handler()->set('lock_' . $key, $value, ["NX", "EX" => $ex]);
+    }
+
+    public function lock($key, $value = '1', $ex = 6)
+    {
+        if ($this->tryLock($key, $value, $ex)) {
+            return true;
+        }
+        System::sleep(1);
+        return $this->lock($key, $value, $ex);
+    }
+
+    public function unlock($key, $value = '1')
+    {
+        $script = <<< EOF
+if (redis.call("get", "lock_" .. KEYS[1]) == ARGV[1]) then
+	return redis.call("del", "lock_" .. KEYS[1])
+else
+	return 0
+end
+EOF;
+        return Cache::store('redis')->handler()->eval($script, [$key, $value], 1) > 0;
+    }
+}