The server would actually talk with the client through the various read and write functions available to the BIO library.
服务器会通过bio库的各种读写函数真正与客户机进行通信。
In particular, database functions such as connect, read, write, and release connection are covered here.
具体地说，这里讨论连接、读、写和释放连接等数据库函数。
At the top is the system call interface, which implements the basic functions such as read and write.
最上面是系统调用接口，它实现了一些基本的功能，例如read和write。
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