I capitalize based on words I'm trying to stress like I would in speech.

Do you have a test program that reproduces this issue ?

No - I figured out the problem but appreciate your response nonetheless.

It gets allocated on the stack, and every thread has its own stack.

This is what I thought - but a hard to locate bug made me start second guessing myself after a few hours. As usual - the tough bugs are usually a simple thing I overlooked.

> Are AnsiStrings managed intelligently in threaded applications? Meaning -

do

> they have the same rules as other variables concerning multi-threaded > applications or does the memory counters or "reference counts" to chunk

of

I don't know what AFAIK means but I do understand what you mean here. To pass an Ansistring from onw thread to another - as far I can tell - is Make it so that the thread doing the move is the ONLY bit of code accessing it at that point in time - and that it would need to be a synchronized thing where the thread doing the copy or move ...

(e.g. (MyThread[1] code)        Self.MyAnsi:=MyThread[2].MyAnsi)

... MUST know for a fact that the data is there, and that no other tasks can or will mess with that variable during the copy/move. This takes synchronization between the two threads and possibly the main app as well depending on implementation.

To Summarize: I was on the track with understanding how the threads were working. They work like separate tasks in an operating system - in fact - they are - but they share a common read/write memory and code memory you could say simply.

And I sent my FPC mailing list message when I was baffled for a few hours on something that just seemed fine when I this I apologize but I was convinced for a time that a variable (a dynamic array of ansistring) were getting stomped randomly - so I figured a thread problem maybe. Eventually I got it down to a specific SPOT that was to mechanical to be haphazard thread issue and then I located the bug.

Thank You for your help. I do try to refrain from sending messages everytime I have an issue and I think I'm at about 5000 lines or more of code per one mailing list question - and I do stay tuned for those times when I can answer someone's question as well.

Hope all had a good holiday season and I hope all have a prosperous 2007.

Thank You Micha

Jason P Sage

Jason P Sage wrote

> First, why the random capitalization ? I capitalize based on words I'm trying to stress like I would in speech.

Capitals are usually read as shouting, so I'd recommend to either leave it out, or use the more common /italic text/, *bold text* or _underlined text_ when you really need to put emphasis on a word for disambiguation. (I.e. surround the word or wordgroup by / /, * * or _ _; some email clients will even display text in the intended style.)

I don't know what AFAIK means but I do understand what you mean here.

AFAIK it mean As Far As I Know ;)

BTW Interesting question about the thread safety of ansistrings; it also applies to other ref-counted stuff like dyn. arrays. If it is not thread-safe, I recommend to make appropriate calls to UniqueString.

Regards,

Bram