Re: [Help-smalltalk] Correct way to throw exceptions/errors from C to ST

[Roland Plüss]

On 04/04/2015 06:24 PM, Holger Hans Peter Freyther wrote:
> On Sat, Apr 04, 2015 at 02:50:01AM +0200, Roland Plüss wrote:
>
> Oh,
>
>> gst_eval_code( "SystemExceptions.InvalidArgument new signal" );
>>
>> But this causes the VM to call abort since an exception happened outside
>> the bytecode. I assume you need to be more clever in this case. So what
>> is the correct way to throw these kinds of exceptions from inside a C
>> function?
> Oh I don't know. The signal should occur once is out of C. E.g.
> you should be able to return an instance of InvalidArgument and
> in the Smalltalk code that triggered the C call-out check for the
> response and then signal it?
>
I don't know. I tried an example like this:

C++: => gst_perform( something )
Smalltalk: something[] => do a cCall (let's say cc)
C++: => cc: thrown exception using gst_eval_code(
"SystemExceptions.InvalidArgument new signal" );

Now let's say I try to catch the exception in Smalltalk. If I'm not
wrong it would look something like this:

something [
   [ anObject aCCallThatThrows ] on: Exception do: [ 'a test' printNl ]
]

But the exception is not handled but abort called by the byte code.
Could it be it fails because I'm using gst_perform?

-- 
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Plüss Roland

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