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Home » U++ Library support » Draw, Display, Images, Bitmaps, Icons » bug in ImageBuffer::Line() and operator[]

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Re: bug in ImageBuffer::Line() and operator[] [message #15440 is a reply to message #15438]

Wed, 23 April 2008 21:04

mirek is currently offline

mirek
Messages: 13975
Registered: November 2005

Ultimate Member

nixnixnix wrote on Wed, 23 April 2008 13:18

I am getting the issue under Win32 and it doesn't appear to be related to calling Refresh as I get the same behaviour when I comment it out and I have many other functions which don't suffer from this bug although I will replace these calls with PostCallback() just to be sure.

Basically the Image object causes an ASSERT(data) even though the data object is perfectly valid.

Are threads other than the main thread allowed to make and refer to Image objects?

Yes. Anyway, as always with MT, if multiple threads work with single Image variable, you need to serialize access via Mutex.

Quote:

I don't really think I understand what you're telling me here. I am allowed to use PostCallback in threads other than the main right?

Yes, but ONLY PostCallback (and related event queue functions). Anything else in CtrlCore and beyond (-> CtrlLib, RichEdit... anything that includes CtrlCore) is disallowed.

(Draw, OTOH, you can use in multiple threads).

Mirek

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[Message index]

		bug in ImageBuffer::Line() and operator[] By: mdelfede on Sun, 09 March 2008 21:21
		Re: bug in ImageBuffer::Line() and operator[] By: mirek on Sun, 09 March 2008 22:28
		Re: bug in ImageBuffer::Line() and operator[] By: mdelfede on Sun, 09 March 2008 22:46
		Re: bug in ImageBuffer::Line() and operator[] By: mirek on Mon, 10 March 2008 09:36
		Re: bug in ImageBuffer::Line() and operator[] By: mdelfede on Mon, 10 March 2008 11:19
		Re: bug in ImageBuffer::Line() and operator[] By: mirek on Wed, 12 March 2008 14:45
		Re: bug in ImageBuffer::Line() and operator[] By: nixnixnix on Wed, 16 April 2008 03:05
		Re: bug in ImageBuffer::Line() and operator[] By: mirek on Wed, 16 April 2008 13:29
		Re: bug in ImageBuffer::Line() and operator[] By: nixnixnix on Thu, 17 April 2008 21:40
		Re: bug in ImageBuffer::Line() and operator[] By: mirek on Thu, 17 April 2008 21:44
		Re: bug in ImageBuffer::Line() and operator[] By: nixnixnix on Thu, 17 April 2008 22:50
		Re: bug in ImageBuffer::Line() and operator[] By: mirek on Wed, 23 April 2008 10:25
		Re: bug in ImageBuffer::Line() and operator[] By: mirek on Wed, 23 April 2008 10:34
		Re: bug in ImageBuffer::Line() and operator[] By: nixnixnix on Wed, 23 April 2008 19:18
		Re: bug in ImageBuffer::Line() and operator[] By: mirek on Wed, 23 April 2008 21:04

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