luajit: new gc

[RaphaelIT7]

WIP

The current idea:
Implement a reference counter used for gc instead of using tri-color.
Though this means to basically go through every piece of code that uses TValue or a GC object and check/adjust it as having a reference leak would be chaos.
I may change the entire approach later, as it does seem utterly painful/difficult to do, just gonna try different things and see

ToDo:

• Properly increment/decrement the reference counter
• Implement code into the GC for removal of objects that have a counter of 0
• Improve implementation to reach the point of not relying on the tri-color gc and possibly removing that

Always open for ideas/feedback though remember, this is still wip and in its early stages

[Zvbhrf]

What improvements new gc brings? Can it fix Vectors and Angles not being cleaned up if you create tons of them?

[RaphaelIT7]

What improvements new gc brings? Can it fix Vectors and Angles not being cleaned up if you create tons of them?

iirc they are cleaned up, though not instantly or is there an existing memory leak with them?
With the reference counters, it could delete them instantly instead of leaving them for a while.

[Zvbhrf]

is there an existing memory leak with them?

Facepunch/garrysmod-issues#5397

[RaphaelIT7]

Huh, totally forgot about that