If the stringlist belongs to the thread then you shouldn't need a critical
section. But if you are accessing the StringList in an event from the Indy
components when data arrives then you may still need a critical section - I
can't remember if the Indy components use the same or a different thread for
each event notification.
Phil.
----- Original Message -----
From: "David McNeill" <[EMAIL PROTECTED]>
To: "Multiple recipients of list delphi" <[EMAIL PROTECTED]>
Sent: Thursday, September 11, 2003 1:30 PM
Subject: RE: [DUG]: TStringList or Memory error.
> Thanks for the pointers...
>
> 1) Are you using interfaces? If so, check that the referenced object
> hasn't
> been relased.
>
> .. No interfaces
>
>
> 2) Have you got your code that references the stringlist wrapped up in a
> critical section?
>
> .. Shouldn't need to because it's threadvar - the thread can write to
> the string list any time it feels like it, it has it's own instance of
> the stringlist.
> Is my assumption correct?
>
>
> 3) Are you trying to access an item in the list that doesn't exist (eg,
> MyList[4] when MyList only contains 4 items - remember that TStringList
> is 0
> based)?
>
> .. Only using .add Generally I then use .text then .clear , so no,
> not an indexing issue.
>
>
>
>
>
>
>
> These are probably all obvious ones you have already checked, but you
> didn't
> say what you had checked or not.
>
> Phil.
> ----- Original Message -----
> From: "David McNeill" <[EMAIL PROTECTED]>
> To: "Multiple recipients of list delphi" <[EMAIL PROTECTED]>
> Sent: Thursday, September 11, 2003 11:56 AM
> Subject: [DUG]: TStringList or Memory error.
>
>
> > This is a nasty one I can't get to the bottom of, so any clues or tips
> > would be appreciated.
> >
> > Fundamental problem: Access Violation on accessing a stringlist.
> >
> > Situation: Database update process iterates 700+ times, doing the same
> > thing, before tipping over.
> >
> > It's like the tstringlist "disappears" for some unknown reason.
> >
> > I use the same method in thousands of other lines, and never fails.
> >
> > Breaks on two servers at the customers place, but not on my dev
> server.
> >
> >
> > Multi-threaded tray app, using Indy http server.
> >
> >
> > Snips:
> >
> >
> > Main.pas
> > threadvar
> > tlResult:TStringlist;
> >
> > Main.pas
> > Procedure TimerExecute;
> > Tlresult:=tstringlist.create;
> >
> > DoDatabaseProcessing;
> >
> >
> > Database.pas
> > Procedure DoDatabaseProcessing;
> > While not database.eof do begin
> > .. hundreds of lines
> > tlresult.add('Ok: Processed item '+IntToStr(RecordNo)); // access
> > violation
> > end;
> >
> >
> >
> >
> > I tried descending tstringlist and putting in a log on
> BeforeDestruction
> > , but it does not appear the stringlist is explicitly being destroyed.
> >
> > It is more like something else is clobbering it's memory, and it is
> > "disappearing" at some point.
> >
> > Any help appreciated.
> >
> >
> > David McNeill
> > McPond eCommerce Software
> > [EMAIL PROTECTED]
> > Buchanan Road
> > Franklin
> > New Zealand
> > Phone 09 292 7212
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
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