Null location/Groups?

[HolyBear]

Do you have to null locations and group to make it not leak, I was reading somewhere that if you don't null it will leak. In "ThingsThatLeak" topic it doesn't say anything about having to null them.

 

[chobibo]

Yes, you need to null them to avoid memory leaks.

 

[Chaosy]

null is a misleading word.
you cant do this with leaks

set udg_someLocationVariable = null

you need to do use this for locations

call RemoveLocation(udg_someLocationVariable)

 

[chobibo]

You still need to set global variables to null though, since they leak memory if the object their referencing is already removed.

 

[Chaosy]

I heard it was only certain types that could be nulled. I also heard it could cause crashes if nulled at the wrong time or something. Most GUIers just skip this.

 

[chobibo]

• I heard it was only certain types that could be nulled.
Must be atomic data types.

• I also heard it could cause crashes if nulled at the wrong time or something.
Could you please provide a link. I didn't know that, I never authored an entire map, just spell triggers.

• Most GUIers just skip this.
That would be bad for periodic triggers, since the leaks would accumulate and make the game lag on computers installed with low memory (1gb below). I guess that would be okay for triggers that only use variables once though.

EDIT: Here's a link to the reference leak I was talking about. Troll-Brain found that one.

 

[edo494]

all types that extend agent must be nulled no matter if global or local variable, because agent is reference counted, and until at least one variable references given object, its handleid wont get recycled(4 bytes leak per object)

according to thread provided by Chobibo, if you dont null agent immedietally after you destroy it, it will leak

 

[TriggerHappy]

Unless the handle is never destroyed, then you don't need to null it.

For example re-using a single group.

 

[HolyBear]

Thanks guys <3

 

[Maker]

We allow GUIers to leave globals unnulled because it is not very significant leak. However in (v)jass we require variables to be nulled.