ERL-646: async_accept for gen_tcp and ssl

[OTP-Maintainer]

Original reporter: juhlig
Affected version: Not Specified
Component: kernel
Migrated from: https://bugs.erlang.org/browse/ERL-646

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Over the past years, I noticed a lot of applications implementing asynchronous accept routines for tcp and ssl sockets, by either using the internal (and therefore, subject to possible unannounced breaking changes) prim_inet:async_accept function, or by running the respective accepts in spawned processes, inventing the wheel over and over.

I therefore propose async_accept methods directly in the gen_tcp and ssl modules/applications, in order to have a standardized, safe way to achieve asynchronous accepts, making the potentially dangerous use of prim_inet:async_accept unnecessary, and reducing boilerplate code.

[OTP-Maintainer]

vans163 said:

Along with this I want to propose to add multiple process recv for gen_udp from the same binded socket.

Currently UDP applications have no way in hell of scaling and WebRTC is everywhere these days.