Hi!

I have a short question regarding to the memory managment of strings:



Would this code blew up my memory?

Thanks for your help!

No, this does no do any harm as "#100" is handled like a constant, that is assigned to TestStr. You can do that without problems. Be carefull with
in a while loop though. This will create a memory leak.

Thanks for your fast reply!

But wait, cou can't define a string inside a function like you did above! You have to use Uhrwerk's code. And that would require you to ptr_remove the string each frame or create if before the beginning of the loop.

Of cause you can. Why shouldn't you be able to use a local variable? I didn't find anything that tells not to do this in the manual and it even compiles and runs like a charme...

Doesn't the manual explicitly say somewhere that you can't define engine objects inside a function?? Also if you look at the manual page for strings:
http://manual.conitec.net/astring.htm
"Defines a global string pointer..."
It says GLOBAL there.

This is what I think will happen in the line
STRING* TestStr = "#100";
It defines a local string pointer and it's set to a pointer of a temporary char array. All attempts to use it as a string will most propably cause a crash.

Hmm... I think we have to ask JCL for clearing that up.

Apparently the Lite-C precompiler creates global STRINGs even for local STRING declarations. So if you have five local STRING declarations in your code, five global STRING objects will be created additionally (you can check this with ptr_first() for example).
I don't know whether using such 'local' strings could cause any problems, though. Probably depends on what "#100" is replaced with.

"#100" must be replaced with a global String with 100 chars. Otherwise it could not be assigned to TestStr. Of course the string created is global, as you can't have local engine objects. But that does not play a role for the code here. Of course the local variable is valid. You can also have local bitmap or sound pointers. That does not make the corresponding engine objects local.