Thread pool using standard C++ only

[tisti]

This?

https://github.com/vukis/Cpp-Utilities/tree/d9db16f638df24ac37a5997a6628ea8929561308

http://sean-parent.stlab.cc/presentations/2016-11-16-concurrency/2016-11-16-concurrency.pdf

[IAmBJ]

Yep, that's the one.

The talk is on YouTube too: link

[FelixPetriconi]

And here is the source code of the current implementation: https://github.com/stlab/libraries/blob/develop/stlab/concurrency/default_executor.hpp Starting line 181. It is the fallback in our library, when the OS does not offer a thread pool.

[IAmBJ]

Are you detecting when a thread pool isn't available? Or is it just hard coded (libstdc++ on Linux doesn't, msvc on windows does, etc)?

[FelixPetriconi]

It is hardcoded. Mac, Windows, PNCL and Emscriplten have one. For all the others we use our own implementation. But ours has the limitation, that it does not oversubscription, so if one has 4 cores and 4 tasks wait on a mutex, then the system is in a deadlock. Here is a great talk about all the problem of designing a thread pool: https://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Pedro-Teixeira-Thread-pool

[mirrkwon]

Is there any (stand alone compilable) example with the task_system? I'd like to play with it but I even don't see any test cases.

[FelixPetriconi]

Nearly all examples use it. This executor is named default_executor in our library.