Discusssion on the Discussion of the Design for a new GC

[Leandro Lucarella via Digitalmars-d]

On Thursday, 24 April 2014 at 14:22:17 UTC, Dicebot wrote:
> On Thursday, 24 April 2014 at 14:15:45 UTC, Orvid King wrote:
>> On Thursday, 24 April 2014 at 10:14:07 UTC, Kagamin wrote:
>>> On Wednesday, 23 April 2014 at 18:35:26 UTC, Messenger wrote:
>>>> On Wednesday, 23 April 2014 at 15:33:36 UTC, Orvid King 
>>>> wrote:
>>>>> After all of that, I intend to include a base draft of the 
>>>>> design of the GC, along with opening the PRs and committing 
>>>>> the starting API. So, is there something I’m missing? Am I 
>>>>> overlooking the obvious? Is there a more practical way to 
>>>>> produce the same results?
>>>>
>>>> What is the state of Rainer Schütze's precise gc? 
>>>> Duplication of effort and all that.
>>>
>>> Also CDGC http://www.llucax.com.ar/proj/dgc/
>>
>> Ah, I hadn't realized he had actually implemented the 
>> concurrent GC he gave a talk on, I will make sure to look over 
>> the code before writing out the design. I was also planning on 
>> watching the full talk before posting the design, to make sure 
>> that it doesn't prevent any aspects of the design from working.
>
> Leandro's CDGC is used as default GC in Sociomantic 
> applications, so it is not only implemented but also 
> extensively production-tested :) I have pinged him to give some 
> feedback about issues he has encountered when trying to port it 
> to D2.

I didn't find any particular issues with the porting, I just 
didn't get far enough with the porting. My idea was to add 
patches on top of the current implementation instead of rolling 
out a complete new implementation from the scratch, since there 
were a few changes to the GC in D2, the porting should be done 
with a lot of care.

There is still also the problem with threading, see 
https://www.dsource.org/projects/tango/ticket/2087 for details.

BTW, if someone wants to take over the porting, and also do it 
"patch by patch" I recommend consulting this repo: 
http://git.llucax.com.ar/w/software/dgc/cdgc.git (here is where 
the complete history of the changes live, not in tango). And of 
course, feel free to contact me for any questions advice you 
might need!