ptr_remove / memory question

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ptr_remove / memory question #344628 10/19/10 07:20 10/19/10 07:20
Joined: Feb 2006 Posts: 1,011 Germany pegamode OP Serious User
pegamode OP Serious User Joined: Feb 2006 Posts: 1,011 Germany	Hi, usually I remove my panels using: Code: ptr_remove(pan); pan = NULL; Now I'm wondering what happens with the allocated memory used for the bmaps within this panel? Do I have to remove them manually before removing the panel? Or is this done automatically during the ptr_remove(pan) call? Is there any difference using ptr_remove(pan) or pan_remove(pan)? Regards, Pegamode. Meteor Mess 3D: https://www.meteormess.de Facebook: https://www.facebook.com/MeteorMess3D Twitter: http://www.twitter.com/MeteorMess3D Discord: https://discord.gg/naJJgdMQDV

Re: ptr_remove / memory question [Re: pegamode] #344630 10/19/10 08:06 10/19/10 08:06
Joined: Feb 2010 Posts: 320 TANA/Madagascar 3dgs_snake Senior Member
3dgs_snake Senior Member Joined: Feb 2010 Posts: 320 TANA/Madagascar	Hi, I think the memory allocated to the BMAP is not destroyed when you call ptr_remove on the panel, because the BMAP is another object and should exist until you delete it explicitly (I think that you can use the same BMAP for different PANELS). If you don't need your BMAP anymore, you can 'ptr_remove' it. Anyway the BMAP will be removed when your game will close cause it's an engine object. Best regards. PhysX 3 Plugin Box2D Plugin

Re: ptr_remove / memory question [Re: pegamode] #344631 10/19/10 08:09 10/19/10 08:09
Joined: Apr 2006 Posts: 624 DEEP 13 badapple User
badapple User Joined: Apr 2006 Posts: 624 DEEP 13	i dont know about a8 , but with a6 i need to purge bmap's and entities before removing them or making them invisible , to reallocate the memory used by them back into free memory.

Re: ptr_remove / memory question [Re: badapple] #344632 10/19/10 08:22 10/19/10 08:22
Joined: Feb 2006 Posts: 1,011 Germany pegamode OP Serious User
pegamode OP Serious User Joined: Feb 2006 Posts: 1,011 Germany	Can someone confirm this? If so then the following define should do the trick, doesn't it? Code: #define _pan_remove(pan) if(pan->bmap != NULL) { bmap_purge(pan->bmap); ptr_remove(pan->bmap); pan->bmap = NULL; } if(pan->mouse_map != NULL) { bmap_purge(pan->mouse_map); ptr_remove(pan->mouse_map); pan->mouse_map = NULL; } if(pan->target_map != NULL) { bmap_purge(pan->target_map); ptr_remove(pan->target_map); pan->target_map = NULL; } ptr_remove(pan); pan = NULL Regards, Pegamode. Meteor Mess 3D: https://www.meteormess.de Facebook: https://www.facebook.com/MeteorMess3D Twitter: http://www.twitter.com/MeteorMess3D Discord: https://discord.gg/naJJgdMQDV

Re: ptr_remove / memory question [Re: badapple] #344633 10/19/10 08:25 10/19/10 08:25
Joined: Feb 2010 Posts: 320 TANA/Madagascar 3dgs_snake Senior Member
3dgs_snake Senior Member Joined: Feb 2010 Posts: 320 TANA/Madagascar	There are two choices for you if you want to ptr_remove a panel : 1 - ptr_remove the BMAP before the PANEL : You MUST set the PANEL's bmap pointer to NULL before removing the BMAP. 2 - ptr_remove the PANEL before the BMAP : You MUST have another pointer that points to the BMAP (You can get the PANEL bmap pointer just before releasing it). Best regards. PhysX 3 Plugin Box2D Plugin

Re: ptr_remove / memory question [Re: 3dgs_snake] #344634 10/19/10 08:32 10/19/10 08:32
Joined: Feb 2006 Posts: 1,011 Germany pegamode OP Serious User
pegamode OP Serious User Joined: Feb 2006 Posts: 1,011 Germany	Why should I set the PANEL's bmap pointer to NULL ??? If I'd do that I would have to save the pointer somewhere else to remove the BMAP. That doesn't seem to make sense. I think the only important thing is that the PANEL doesn't try to access the BMAP anymore after removing the pointer to the BMAP within the PANEL. Meteor Mess 3D: https://www.meteormess.de Facebook: https://www.facebook.com/MeteorMess3D Twitter: http://www.twitter.com/MeteorMess3D Discord: https://discord.gg/naJJgdMQDV

Re: ptr_remove / memory question [Re: pegamode] #344635 10/19/10 08:32 10/19/10 08:32
Joined: Feb 2010 Posts: 320 TANA/Madagascar 3dgs_snake Senior Member
3dgs_snake Senior Member Joined: Feb 2010 Posts: 320 TANA/Madagascar	I think yes, but you must be very careful. If other panels use your BMAPS and you free them, your application will crash. Best regards. PhysX 3 Plugin Box2D Plugin

Re: ptr_remove / memory question [Re: 3dgs_snake] #344636 10/19/10 08:35 10/19/10 08:35
Joined: Feb 2006 Posts: 1,011 Germany pegamode OP Serious User
pegamode OP Serious User Joined: Feb 2006 Posts: 1,011 Germany	Yeah ... but most of my PANELs are created like this: pan_create("bmap = background.pcx",1); So the PANELs don't share the pointer to a BMAP. Does someone know if there's a difference between ptr_remove and pan_remove ??? Meteor Mess 3D: https://www.meteormess.de Facebook: https://www.facebook.com/MeteorMess3D Twitter: http://www.twitter.com/MeteorMess3D Discord: https://discord.gg/naJJgdMQDV

Re: ptr_remove / memory question [Re: pegamode] #344637 10/19/10 08:42 10/19/10 08:42
Joined: Feb 2010 Posts: 320 TANA/Madagascar 3dgs_snake Senior Member
3dgs_snake Senior Member Joined: Feb 2010 Posts: 320 TANA/Madagascar	What I say is true, and that really makes sens : if you remove the BMAP, its allocated memory will be freed by the engine but the panel bmap pointer will still point to it, so the crash. Yes, You are right about the important thing, but how will you do it? I think that You will not throw in another BMAP (so the NULL thing). Best regards. PhysX 3 Plugin Box2D Plugin

Re: ptr_remove / memory question [Re: 3dgs_snake] #344638 10/19/10 08:50 10/19/10 08:50
Joined: Feb 2006 Posts: 1,011 Germany pegamode OP Serious User
pegamode OP Serious User Joined: Feb 2006 Posts: 1,011 Germany	I know that I should set the pointer tu NULL, but I don't see any reason why to do that before removing the BMAP. Take a look at the code I posted: Code: if(pan->bmap != NULL) { bmap_purge(pan->bmap); ptr_remove(pan->bmap); pan->bmap = NULL; } As you can see I set the bmap pointer to NULL AFTER removing the bmap. If I call "pan->bmap = NULL;" before I couldn't call "bmap_purge(pan->bmap)" afterwards because "pan->bmap" points to NULL. Meteor Mess 3D: https://www.meteormess.de Facebook: https://www.facebook.com/MeteorMess3D Twitter: http://www.twitter.com/MeteorMess3D Discord: https://discord.gg/naJJgdMQDV

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