rotor VS Boost.Asio

If your architecture fits into inter-process messaging, i.e. spawn threads which do similar or different tasks and inform each other via messages, try to use actor framework, i.e. rotor (disclaimer: I'm the author). If there is a need to expand messaging even more, i.e. across the network, you can try to use caf, which provides that facility out of the box.

What you achieved, is handlers decoupling, i.e. when one handler knows nothing about other handler, which leads to good application testability. However, with standard promise/future bases messaging, if performance matters (and it usually does, otherwise why use C++?), i doubt that your implementation overwhelms the performance of specialized actor libraries, like sobjectizer ("batteries included" actors toolbox) or rotor (DIY-like actor constructor set; disclaimer: I'm the author of it).

I have been reading the documents from Boost.fibre and Boost.Signals2 which I could use, maybe ASIO for async. I also checked ZeroMQ (this seems to be more or less "only" for networking), Copper and Rotor. If this were just a simple MCU project I would just take the FreeRTOS and would have everything I need. Now I'm just lost how to structure my code / how to realize my main loop.

I would like to present my project rotor, which is event loop friendly C++ actor micro framework with Erlang-like microframework with supervising capabilities.

rotor actor library (I'm the author) was designed to solve similar problem, which I named "actor intrusiveness", when almost every piece of code should be written in form of actor, and, the working threads, which spin actors, are out of your control.

PS. I'm the author of rotor framework )

May be actor frameworks like caf, sobjectizer or rotor is something, that you are looking for.

Indeed looks like it, strand_executor_service.hpp is using a Mutex internally (otherwise it wouldn't make sense to me).

as a side note, Asio is also released as an independent library without the boost stuff https://think-async.com/Asio/

Now that vinniefalco is going to kill off the asio standalone (see deprecate standalone ) and only support boost what would people then recommend to switch over to.

The ASIO framework can be found at https://think-async.com/Asio/ and the relevant license for its use is included in the GitHub repository in the Vendor/licenses directory.

The library is found at https://think-async.com/Asio/.

Asio Extracted from the much bigger Boost C++ library, it's apparently a really good networking library. As a bonus it also handles async / threads. Here's a really good video tutorial by OneLoneCoder

Yes: https://github.com/chriskohlhoff/asio/blob/master/asio/include/asio/coroutine.hpp

Here's the main contributor to Asio. I looked at Asio's repository and this was the first guy.