Interleaving writes on a TCP connection: are they atomic?

Questions / Help
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1

I have a TCP/IP server writing responses to a connected socket. (I use Socket.Stream.send, it may be different with raw :gen_tcp?)
Several Elixir processes run in parallel writing to the same socket. Is there a guarantee that each send will be atomic and will not interfere with other writes? Where exactly to find this information?

2

Each send is atomic, yes, regardless of whether data is sent right away or buffered.

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