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Re: guile fibers - looking for adivce

From: Jan Wielkiewicz
Subject: Re: guile fibers - looking for adivce
Date: Mon, 7 Sep 2020 18:56:27 +0200


Dnia 2020-09-05, o godz. 18:19:49
Aleix Conchillo Flaqué <> napisał(a):

> Hi!
> On Sat, Sep 5, 2020 at 3:48 PM Jan Wielkiewicz <
>> wrote:
> I believe sharing the same object by the two fibers defeats the
> purpose of message passing, because with the way you are doing it you
> find exactly the problem you are having and the only way to fix this
> is by using mutexes. That is, you are trying to use fibers as you
> would use regular threads sharing a resource. Instead, there should
> probably be a main fiber (that holds the object) and send messages
> (with the data needed from the object) to 2 other fibers (those would
> be your methods A and B).
I see, thank you for explanation. This allowed me to understand the
problem doesn't lie in the way I was trying to implement my messaging
through fibers, but rather in the way I was using GOOPS - my custom
method for initializing slots called next-method after doing everything
what caused some weird problems with allocation.

Are threads and mutexes worth using, if there are fibers already? 
I know I'll have to learn this eventually, to fully master programming,
but I'm not sure if there's a great advantage over fibers.

> I haven't used fibers extensively, but I've used Go quite a bit which
> follows the same pattern of channels and message passing and this is
> how you would do it.
> Also, the fibers manual also suggests this approach:
Yeah, I've read the manual like three times already, but Andy is
somethimes writing sentences from outer space, including the GOOPS
manual. This isn't the level of English I'm currently on.
I guess I'll write some self-explaining examples of GOOPS after I fully
understand it.

> That said, I might be wrong though.
> Hope this helps,
> Aleix

Thanks for explanation, this made my thinking much cleaner. I can get
back to experimenting now!

Jan Wielkiewicz

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