When is it needed to use NSAutoReleasePool?

[Quin]

When I was taught Objective-C, I learned to always wrap everything in your main method in an NSAutoReleasePool, so it gets auto-released on program termination. My question is, as someone who's fairly inexperienced with Cocoa dev in PB, when is it needed to use one in PB? Any time I create an NSObject?
Thanks!

[wilbert]

Within the PureBasic event loop, the objects marked for autorelease, are released regularly.
If you need them to be released more often you can use your own autorelease pool.

[mk-soft]

If CocoaMessage is used in threads, you must create your own pool.

Code: Select all

Procedure foo()
  Protected pool
  
  Pool = CocoaMessage(0, 0, "NSAutoreleasePool new")
  
  ; do any
    
  If Pool
    CocoaMessage(0, Pool, "release")
  EndIf
  
EndProcedure

foo()

[Quin]

Only in threads? What do you mean exactly?
This function will be called from both the UI loop and the networking loop of my application. DO I need the autoreleasepool?

Code: Select all

		Protected.i NSPool, NSDateFormatter, NSString, NSLocale, NSDate
		Protected Res$
		NSPool = CocoaMessage(0, 0, "NSAutoreleasePool new")
		NSLocale = CocoaMessage(0, 0, "NSLocale currentLocale")
		NSDateFormatter = CocoaMessage(0, 0, "NSDateFormatter new")
		CocoaMessage(0, NSDateFormatter, "setLocalizedDateFormatFromTemplate:$", @"MMddyyyyHHmmss")
		NSDate = CocoaMessage(0, 0, "NSDate date")
		NSString = CocoaMessage(0, NSDateFormatter, "stringFromDate:", NSDate)
		Res$ = CocoaString(NSString)
		CocoaMessage(0, NSPool, "release")
		ProcedureReturn Res$

Furthermore, I have this function that's only called from the main thread, at the start of my application. I assume I don't need one here?

Code: Select all

		Protected NSArray.i
		NSArray = NSSearchPathForDirectoriesInDomains_(#NSDocumentDirectory, #NSUserDomainMask, #YES)
		ProcedureReturn CocoaString(CocoaMessage(0, NSArray, "firstObject")) + #PS$ + "Log.txt"

Thanks!