* 在多进程的模式下共享一些数据需要用到swoole的table.`Table`内置行锁自旋锁所以是线程/进程安全的.
<details>
<summary>config/swoole.php</summary>
~~~
'tables' => [
'u2fd' => [
'size' => 10240,
'columns' => [
['name' => 'fd', 'type' => 1, 'size' => 8]
]
],
'fd2u' => [
'size' => 10240,
'columns' => [
['name' => 'uid', 'type' => 1, 'size' => 8]
]
],
],
~~~
</details>
这里配置了一个fd与uid的相互映射关系.后续用到.
关于字段的说明参见swoole手册[https://wiki.swoole.com/#/memory/table](https://wiki.swoole.com/#/memory/table)
