On Jan 24, 2008 10:16 PM, Michael Goffioul <[EMAIL PROTECTED]> wrote:
> On 1/24/08, Olivier Lefevre <[EMAIL PROTECTED]> wrote:
> > I'm looking at the source now. If you want the equivalent of
> > the octave_main function from src/octave.cc without the call
> > to main_loop, doesn't the embedded argument to octave_main
> > already let you do that?
>
> Indeed, I overlooked that. It might then be easier than I thought.
> If you're willing to implement it and you succeed, I'll integrate your
> changes in the java package.
If it can help you, here are some hints about how I would
do it:
- don't re-use the Octave.java class; it has been designed to
work with JHandles in order to execute callbacks synchronously
with an interactive octave.
- don't re-use the input_event_hook, this is mainly useful when
you want to synchronize with an interactive octave, which is
not what you want.
- don't try to initialize the java package (by calling java_init for
instance); this will be done automatically by the octave engine
when it needs it; the java package is able to attach itself to
a running JVM, instead of starting a new one; however there
are some java properties that would need to be defined by
the calling java application
- define a new OctaveEngine class
- add a native start method to start the octave engine: calls
octave_main with embedded set to true
- add native methods to call octave functions, eval strings...
(there you can re-use the box/unbox functions to perform
octave/java object conversion; conversion is controlled
internally by Vjava_convert_matrix and Vjava_unsigned_conversion)
- because octave is not thread-safe, you must make sure the
octave functions are called by a single thread at a time;
this can be achieve from java world by using the synchronized
keyword, for instance:
public class OctaveEngine
{
static Object __lock__ = new Object();
Object call_function (String name, Object[] args)
{
synchronized (__lock__)
{
// do something
}
}
void eval_string (String cmd)
{
synchronized (__lock__)
{
// do something
}
}
}
Michael.
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