Re: ANN: threads enabled Itcl
- From: "Wojciech Kocjan" <myfirstname@xxxxxxxxxx>
- Date: Mon, 17 Jul 2006 21:18:06 +0200
On Fri, 14 Jul 2006 08:40:47 +0200, Eckhard Lehmann <ecky-l@xxxxxx> wrote:
Hi all,
I've written a patch for Itcl that makes it possible to use Itcl
objects in multiple threads. It is possible to create an object e.g. in
the main thread (using the -ts/-threadshared option) and call methods
on it in a different thread.
Sounds really interesting! Especially when using things like AOLserver or writing other multithreaded servers.
The patch for Itcl and also one for Itk can be downloaded at
http://e-lehmann.de/?page_id=31, I wrapped up the sources and created
binaries for Linux and windows as well, and created a Wiki entry at
http://wiki.tcl.tk/16140.
I'm wondering about one thing, though. The main drawback should be that you need to either deepcopy the Tcl_Obj or convert to/from strings. Both seem very time consuming to me.
From what I remember with ns_cache from AOLserver, Tcl_Obj cannot be shared between threads. So if this is true, your code will probably fail when exiting Tcl or deleting the object, probably in a more complex scenario.
Also, how does it handle the following code:
namespace eval ::myns {}
A -threadshared ::myns::obj0
I would assume you may need to create the parent namespace in each other thread.
--
WK
.
- References:
- ANN: threads enabled Itcl
- From: Eckhard Lehmann
- ANN: threads enabled Itcl
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