Re: [tkined] Example script to crash multithread TCL/TNM/TCLHTTPD

From: Juergen Schoenwaelder (
Date: Fri Jun 23 2000 - 09:46:24 MET DST

>>>>> Matthew Krenzer writes:

Matthew> At this point I am assuming Tnm is not thread safe.

Correct. I have some more thread safety patches that are however not
yet in the CVS version.

Matthew> Also, a few of the segfaults where located in TCL proper - so
Matthew> is it really thread safe? or is it the way it interfaces
Matthew> with Tnm that caused the fault? Anyway . . .

A non-thread-safe extension can cause your program to crash at almost
arbitrary places, almost anytime. And right now, most extensions are
not thread-safe so using them in a multi-threaded application is
likely to make your application instable.


Juergen Schoenwaelder      Technical University Braunschweig
<>  Dept. Operating Systems & Computer Networks
Phone: +49 531 391 3289    Bueltenweg 74/75, 38106 Braunschweig, Germany
Fax:   +49 531 391 5936    <URL:>

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