Free types

BlitzMax Forums/BlitzMax Module Tweaks/Free types

Bot Builder

(Posted 2004) [#1]

Turns out it doesnt work. I'm not sure why, but it appears that perhaps when passing a type reference to a dll the type is copied? I've tried other methods than the one written here. I wrote a C function that sets the reference count to 0, still doesn't work. Any idea why not mark?

Original post:

There are some probs with freeing types, described here: <a href="http://www.blitzbasic.com/Community/posts.php?topic=42070" target="_blank">http://www.blitzbasic.com/Community/posts.php?topic=42070</a>

I've fixed this problem by adding a method to every object in existance, "Free".

Procedure:
1. Open up your mods directory
2. Open "brl.mod"
3. Open "blitz.mod"
4. Open up blitz_classes.i up in a text editor.
5. Add this line to the end of the "Object^Null" class:(quote)-Free()="bbObjectFree"(/quote)

Your new object decleration should now look like:(quote)Object^Null{

	-New()="bbObjectCtor"
	-Delete()="bbObjectDtor"

	-ToString:String()="bbObjectToString"
	-Compare:Int( otherObject:Object )="bbObjectCompare"
	-Free()="bbObjectFree"

}="bbObjectClass"(/quote)

Then, open up your command prompt and change to the BlitzMax\Bin directory. do this:(quote)BMK makemods brl(/quote)

This will recompile the necessary modules.  Then, try out this program, a mod of fredborgs buggy program:
(code)Type Test
	Field t:String = "This is something funky"
End Type

a:Test = New Test
b:Test = a
Release a

a.Free() 'Added this
FlushMem

' This still works (only 'a' was nullified, but the actual instance wasn't released)
' [EDIT] Now it'll crash it, as it should :)
Print b.t
' This will make an error ('a' is really gone...maybe)
Print a.t(/code)

Now, it'll crash without printing anything.

BR - Add this NOW! ;)

fredborg

(Posted 2004) [#2]

Bot Builder we loves you!

Bot Builder

(Posted 2004) [#3]

lol :) your welcome

fredborg

(Posted 2004) [#4]

Hmm, I wonder why you must use Release first and then Free...Free on it's own doesn't work.

Edit: Well, it looks like it doesn't actually work after all...

Bot Builder

(Posted 2004) [#5]

:(

Nevermind. really all its doing is crashing it by freeing twice.