Re: [tcljava-user] Loading native tcl Library

[Patrick F. <fin...@gm...>]

On Wednesday 09 September 2009 19:54:32 Jerry Sugiarto wrote:
> I found this email thread, and wonder if this is still true with Jacl
> 1.4.1.
>
> I could run the tcl script from Jacl shell, however I can't do that from
>
> my Java program. It will cause exception when this command is encounter:
>
> load abc.dll struct
>
>
>
> Does this mean I have to switch to Tcl Blend ?
>
> Thanks.
>
>
>
>
>
> Hi,
>
> >  I have a tcl script that performs the following statement:
> >
> >      load tclx83.dll Tclx
> >
> >
> >
> >  When I run my tcl script, using  tcl84 shell, the tcl script works fine.
> >
> >
> >
> >  I want to use jacl to run my tcl script from my java application.
>
> You can't load native Tcl libs into a Jacl application. If you
>
> want to do that, you will need to use Tcl Blend not Jacl.
>
> Tcl Blend 1.3 supports loading both Tcl and Tcl Blend into
>
> an existing JVM.
>
>
>
> Mo DeJong
>
> Red Hat Inc
>
>
>
>
>
> Jerry Sugiarto
>
> QA Engineer
>
> VSS Monitoring, Inc.
>
> 38 Adrian Court
>
> Burlingame, CA 94010
>
>
>
> + 1.650.697.8770 t
>
> + 1.650.697.8779 f
>
>
>
> http://www.vssmonitoring.com l Silicon Valley, USA l Tokyo, Japan l
> Beijing, China
>
> V SS Monitoring's Distributed Traffic Capture SystemsT fundamentally
> improve price-performance and network analyzer efficiency, as well as
> increase network visibility and reduce response times. Only VSS Monitoring
> offers a single vendor total traffic capture solution, encompassing small
> deployments requiring basic network taps, through large, complex
> deployments with multiple monitoring solutions that become highly leveraged
> through its unique distributed systems.

The answer is yes. 

Jacl is written in Java.
TclBlend is written in C.

A java runtime will not execute C dlls natively.  The Java runtime needs to 
load a C runtime(TclBlend) which can then call a C dll.