[TCLCORE] Re: No bug... BUG ?: memory leak using TclPro141 under NT 4.0

[Jeffrey H. <jef...@aj...>]

This is a bit of a standard gotcha, and I think that it should be
fixed.  The 'console' in the Windows/Mac implementation is *always*
there by default - whether you see it or not (as evidenced by the
fact that 'console show' is a great trick that people like to get
an eval console on other systems).

'puts' will put data into the console.  This has nothing to do with
Itcl (that's all a red herring).  Someone reported a similar "mem
leak" in tkcon, so I added a default saved line limit (like xterm
and all the rest have).  This doesn't help much if your data lines
are zigKB long, but it works for things like below.  The same could
be done for the console.

Even better would be to have that console just not exist when the
user is not running interactively, except via a package.  Something
like 'package require console'.  Then you could fix it up and add
more features, and even make it available on Unix.

Jeffrey Hobbs                     Tcl Ambassador
ho...@Aj...          Ajuba Solutions (nee Scriptics)

> -----Original Message-----
> From: David Gravereaux [mailto:dav...@aj...]

> Subject: (fwd) [Fwd: BUG ?: memory leak using TclPro141 under NT 4.0]
> (fwd)
>
>
> I changed the code a bit to be the following:
>
> ------------------------
> package require Itcl
>
> itcl::class Ca {
>   public method Poll {}
> }
>
> itcl::body Ca::Poll { } {
>   puts "Inside Ca::Poll"
>   after 50 "$this Poll\;puts \"******** Poll called**************\""
> }
>
> Ca ObjA
> ObjA Poll
>
> if {[regexp {^(.*)tclsh} [info nameofexecutable]]} {
>   puts "spawning event loop"
>   vwait forever
> } else {
>   wm withdraw .
> }
>
> ------------------------
>
> running it under tclsh83, I observed no memory growth.
> running it under wish83, I did observe a large amount of growth.
>
> Changing the commandline to pipe output to the console, avoiding the console
> widget, I observed no memory growth:
> C:\Program Files\Tcl\bin> wish84.exe pollTest.tcl | cat32.exe
>
> So I'll assume, the console widget is growing it's storage to accommodate all
> the output.  I don't really see a bug with this.  I couldn't check with wish83
> piped due to a bug in win2k, that's checked for in 8.4.
> --
>   David Gravereaux <dav...@aj...>      Yet Another Tcl Guy
>   Sustaining Engineer (Tech Support)                  Ajuba Solutions
>   (650) 230-4079
>

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