Re: [Gc] GC and Coroutines in multiple threads

My current understanding is that fiber/coroutine is similar to regular thread except that we are in do-blocking state for all except current fiber.
It is better to propose high level api for fibers like register/unregister/switchTo or even intercept system fiber api like we did for regular threads.
---- вторник, 22 сентября 2015г., 06:24 +03:00 от "Juan Wajnerman" < [email protected]> :

>Long time ago, I opened a discussion about using the GC with coroutines (using libpcl):  https://lists.opendylan.org/pipermail/bdwgc/2014-January/005819.html
>
>Eventually I solved the problem, by setting GC_stackbottom to the right value before jumping to a different coroutine, and then making sure all coroutine stacks are visited during GC. The code is in Crystal language but I think it’s easy to understand even if you don’t know the language:  https://github.com/manastech/crystal/blob/master/src/fiber/fiber.cr
>
>This works perfectly fine as long as a single thread is used, but now we want to to take this to the next level and have coroutines in multiple threads.
>
>As far as I understand, GC_stackbottom only serves for the main thread. For other threads, this value is stored in GC_thread.stack_end. However this is not part of the public API. The only public function that can actually make changes to this value seems to be GC_call_with_gc_active. However, this is not useful for coroutines, because I need to set back the value once the coroutine is resumed, so this doesn’t work with the callback style that this API have to offer.
>
>Do you think it’s possible to add some public API to expose this functionality? I could work on this and send a PR. For example, adding a function like: GC_set_current_thread_stack_end(ptr_t).
>
>Best regards!
>- Juan
>
>_______________________________________________
>bdwgc mailing list
>[email protected]
>https://lists.opendylan.org/mailman/listinfo/bdwgc

_______________________________________________
bdwgc mailing list
[email protected]
https://lists.opendylan.org/mailman/listinfo/bdwgc