Re: [asio-users] Send / receive separately question

[Torsten R. <Torsten@Robitzki.de>]

Hi Michael,
	
> Am 23.10.2017 um 12:59 schrieb Michael IV <exp...@gm...>:
> 
> What I don't understand here is: if both send and receive async  methods are being called always,how it doesn't cause to a stack overflow. I mean, every time async read is called,but there is nothing to read yet, what happens after the hood? Is this really the way to do what I asked? Thanks!

asynchronous functions just queue the IO or timer and then return. If you have a single threaded server, the single thread of the server usually blocks in io_service::run(). You start your server by queuing a timeout. In the timeout handler, you queue a send and queue a next timeout. There are no recursive function calls. Even when you use lambdas and call the same function from the lambda. The lambda will be executed from the context of io_service::run(), not from from the function, where you defined the lambda.

kind regards,

Torsten