帮助理解 IO 模型
考虑这个矩阵：
我一直在思考什么可以成为每个 IO 模型的一个很好的例子。
到目前为止我得到了什么：
- 同步阻塞：例如，一个单线程应用程序在执行 read() 系统调用时发生阻塞
- 同步非阻塞：同一个应用程序，但只使用一个线程，使用一个线程池，其中多个线程处理阻塞 IO-主线程不阻塞时的操作。
- 异步阻塞：使用阻塞 poll() 调用来管理严重文件描述符（如套接字）的应用程序。 （libevent 也是异步阻塞还是异步非阻塞？那 ePoll() 呢？）
- 异步非阻塞：？？？
我想在你们的帮助下知道我的想法是否正确，以及你们是否可以帮助我理解每个模型。
谢谢！
异步
Consider this Matrix:
I have been thinking for a while what could be a good example for each IO-Model.
What i get so far:
- Synchronous Blocking: For example a Single Threaded Application which blocks while performing a read() System Call
- Synchronous Non-Blocking: The Same Application but instead just using one Thread using a Threadpool with several Threads which handle blocking IO-Operations while the main Thread doesnt block.
- Asynchonous Blocking: An Application which uses the blocking poll()-Call to manage severel File Descriptors like Sockets. (Is libevent also Asynchronous Blocking or Asynchronous Non-blocking? And what about ePoll()?)
- Asynchronous Non-Blocking: ???
I would like to know with some help of you guys if my thoughts are right and if you could help me understanding each Model.
Thanks!
Asynchronous
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同步阻塞：你走到咖啡壶前，按下“冲泡”按钮。在咖啡冲泡完成之前，您不得离开。
同步非阻塞：你正在看报纸，想要喝点咖啡，你告诉你的朋友去煮壶。他这样做了，并且必须等到比赛结束才能离开彩池。
异步阻塞：您正在阅读报纸并想要更多咖啡。你告诉你的朋友去煮一壶咖啡，煮好后给你端来一杯咖啡。
Synchronous Blocking: You go to a coffee pot and hit brew. You are forbidden to leave until the coffee finishes brewing.
Synchronous Non-Blocking: You are reading a newspaper and want some coffee you tell your friend to go brew a pot. He does so and has to wait until it finishes to leave the pot.
Asynchronous Blocking: You are reading a newspaper and want more coffee. You tell your friend to go brew a pot and bring you a cup of coffee when it's done.