问题描述
- 我们还可以从一个线程和recv发送从另一个同一插座上？
- 我们可以调用多个不同线程平行发送相同的插槽上？
我知道，一个好的设计应该避免这种情况，但我不清楚这些系统API将如何表现。我无法找到一个良好的文档也一样。
I know that a good design should avoid this, but I am not clear how these system APIs will behave. I am unable to find a good documentation also for the same.
在方向任何指针会有所帮助。
Any pointers in the direction will be helpful.
推荐答案
POSIX定义发送/ recv的是原子操作，所以假设你在谈论POSIX发送/ recv的话，是的，你可以同时从多个线程和东西给他们打电话会工作。
POSIX defines send/recv as atomic operations, so assuming you're talking about POSIX send/recv then yes, you can call them simultaneously from multiple threads and things will work.
这并不一定意味着他们会并行执行 - 在多的情况下发送，第二个可能会被阻塞，直到第一个结束。你可能不会注意到这么多，作为发送完成一旦其将数据输出到socket缓冲区。
This doesn't necessarily mean that they'll be executed in parallel -- in the case of multiple sends, the second will likely block until the first completes. You probably won't notice this much, as a send completes once its put its data into the socket buffer.
如果你使用SOCK_STREAM套接字，试图做的事情并行不太可能像发送有用/ recv的可能发送或接收消息，这意味着事情的一部分可以得到分手了。
If you're using SOCK_STREAM sockets, trying to do things a parallel is less likely to be useful as send/recv might send or receive only part of a message, which means things could get split up.
阻塞发送/ recv的上SOCK_STREAM套接字只阻塞，直到他们发送或recv至少1个字节，因此阻塞与非阻塞的区别是没有用的。
Blocking send/recv on SOCK_STREAM sockets only block until they send or recv at least 1 byte, so the difference between blocking and non-blocking is not useful.
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