• AnimusPEXUS (10/10) Jul 31 2022 how should it work?:
• AnimusPEXUS (2/3) Jul 31 2022 warn
• vit (6/16) Aug 01 2022 Why not use
• AnimusPEXUS (5/6) Aug 01 2022 thanks, I know about those.
• Alexandru Ermicioi (3/9) Aug 02 2022 You should be able to use object destructor for that. Just be

AnimusPEXUS <animuspexus protonmail.com> writes:

how should it work?:

when GC finds class instance which is good to be collected, it 
calls special function on this instance: `bool 
good_to_collect()`. if function returns true, then on next pass 
GC cleanups object without calling to `good_to_collect()`. if 
function returns false, then GC does nothing with object and 
continues periodically asking object if it's ready to be 
collected.

`good_to_collect()` it self can be used by App, to perform 
cleanups, for instance destroy dependent objects.

AnimusPEXUS <animuspexus protonmail.com> writes:

On Monday, 1 August 2022 at 05:33:02 UTC, AnimusPEXUS wrote:
wark

warn

vit <vit vit.vit> writes:

On Monday, 1 August 2022 at 05:33:02 UTC, AnimusPEXUS wrote:
 how should it work?:

 when GC finds class instance which is good to be collected, it 
 calls special function on this instance: `bool 
 good_to_collect()`. if function returns true, then on next pass 
 GC cleanups object without calling to `good_to_collect()`. if 
 function returns false, then GC does nothing with object and 
 continues periodically asking object if it's ready to be 
 collected.

 `good_to_collect()` it self can be used by App, to perform 
 cleanups, for instance destroy dependent objects.

Why not use

GC.addRoot: https://dlang.org/library/core/memory/gc.add_root.html
GC.removeRoot: 
https://dlang.org/library/core/memory/gc.remove_root.html

?

AnimusPEXUS <animuspexus protonmail.com> writes:

On Monday, 1 August 2022 at 11:21:43 UTC, vit wrote:
 GC.addRoot: GC.removeRoot:

thanks, I know about those.
But my point is not just to preserve objects from being GCed, but 
object's to be notified before GC, so objects could do some 
additional cleanups.

Alexandru Ermicioi <alexandru.ermicioi gmail.com> writes:

On Tuesday, 2 August 2022 at 05:23:14 UTC, AnimusPEXUS wrote:
 On Monday, 1 August 2022 at 11:21:43 UTC, vit wrote:
 GC.addRoot: GC.removeRoot:

 thanks, I know about those.
 But my point is not just to preserve objects from being GCed, 
 but object's to be notified before GC, so objects could do some 
 additional cleanups.

You should be able to use object destructor for that. Just be 
warned, don't use pointers in code, they may be obsolete already.