等待多个事件C ++ [英] Waiting on multiple events C++

问题描述

是否有建议的方法来等待多个输入.例如，我希望我的程序能够接收来自3个来源的输入:

Is there a recommended way to wait on multiple inputs. For example I would like my program to be able to receive input from 3 sources:

在线程条件下收听，例如pthread_cond_wait()

Listen on a thread condition e.g. pthread_cond_wait()

从标准输入中获取数据，例如getline()

Take data from Standard input e.g. getline()

在套接字上收听，例如accept()

Listen on a socket e.g. accept()

完成此任务的最佳方法是什么?每个不同的输入源都需要一个线程吗?谢谢

What is the best way to accomplish this? Do I need a thread for each different input source? Thanks

推荐答案

使用 pthread_cond_timedwait 等待带有超时，这样您就不必等待超过特定时间的时间.

You can listen on multiple file descriptors without using multiple threads using the select(2) system call. You can use pthread_cond_timedwait to wait on a condition variable with a timeout, such that you don't wait more than a particular amount of time.

我认为同时等待条件变量或某种文件描述符是非常不寻常的-如果您完全确定要这样做，则必须使用多个线程，一个线程调用pthread_cond_wait/pthread_cond_timedwait，另一个线程调用select或其他一些I/O函数.

I think it's highly unusual to want to simultaneously wait on either a condition variable or a file descriptor of some sort -- if you're absolutely sure that that's what you want to do, you'll have to use multiple threads, with one thread calling either pthread_cond_wait/pthread_cond_timedwait, and the other thread calling select or some other I/O function.

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