Linux套接字使用多个线程发送 [英] Linux socket using multiple threads to send

问题描述

我有一个非阻塞套接字，它向多个目标发送udp数据包，并在同一套接字上接收所有这些对象的响应.我正在读一个专用线程，但是写(sendto)可能来自几个不同的线程.

I have a single non-blocking socket sending udp packets to multiple targets and receiving responses from all of them on the same socket. I'm reading in a dedicated thread but writes (sendto) can come from several different threads.

在没有任何其他同步的情况下这是安全的吗?持有互斥体时需要写东西吗?或者，写操作是否需要来自同一线程，并且我需要一个队列?

Is this a safe without any additional synchronization? Do I need to write while holding a mutex? Or, do writes need to come from the same thread and I need a queue?

推荐答案

内核将为您同步对底层文件描述符的访问，因此您不需要单独的互斥体.如果您使用的是TCP，则这种方法会出现问题，但是由于我们在谈论UDP，因此这应该是安全的，尽管不一定是最好的方法.

The kernel will synchronize access to underlying file descriptor for you, so you don't need a separate mutex. There would be a problem with this approach if you were using TCP, but since we are talking about UDP this should be safe, though not necessarily best way.

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