C# async socket reading and writing at the same time?

Question

I am writing a tcp chat server at the moment and i read a lot of articles about synchronous and asynchronous sockets.

I decided to use the async sockets because this way i don't have to manage the threads myself.(Anything reason i should to change my opinion ?)

In all the articles, it was nicely explained how to establish a connection and how to send and receive data BUT never what happens if there might be more than one message to send without a reply.

My Question is do i have to call socket.endreceiving() before i want to send something ??? If i don't what would happen if i receive a message at the same time i want to send one ??? (there are multiple threads but its still one underlying socket right?)

I dont really have code yet im still in the process of planning. Its a general question. — D4rth B4n3
– D4rth B4n3, Commented Sep 18, 2014 at 13:23
A feasibility study is an important part of technology selection. ie. Pick a technology and try it. If it fails and you don't know why, we would like to see that code. — Gusdor
– Gusdor, Commented Sep 18, 2014 at 14:04
No reason to change that opinion. The sockets will be asynchronous no matter what you do; if you use the asynchronous API you won't be over-taxing the system with threads sitting around waiting for communications and thus be more scalable. — Peter Ritchie
– Peter Ritchie, Commented Sep 18, 2014 at 15:03

vtortola · Accepted Answer · 2014-09-18 15:00:43Z

3

Find there an example of asynchronous TCP listener and client https://github.com/vtortola/AynchronousTCPListener

You can send and write and the same time, you cannot send from two threads at the same time through the same socket.

answered Sep 18, 2014 at 15:00

vtortola

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jeoffman · Accepted Answer · 2014-09-18 13:53:34Z

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In my experience this is not a problem for Socket.Send or Socket.SendAsync

answered Sep 18, 2014 at 13:53

jeoffman

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1 Comment

jeoffman Over a year ago

I have written modules that send data using TCP sockets across multiple threads. It is trivial with Socket.Send, and with SendAsync you just need to manage your buffers in a thread-safe manner.

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