In order to remove a crash in ooRexx when using ooRexx from OpenOffice (AOO)
via BSF4ooRexx, I am
contemplating to implement RFE
<http://sourceforge.net/p/oorexx/feature-requests/356/>.
However, short of having the needed overview about how the pieces fit together,
a RFH (request for
hints/help) of which parts of the interpreter need to be taken care of.
My initial (unsubstantiated) thoughts go along the lines:
* it is sufficient to become able to learn whether a Rexx interpreter
instance is in the process
or has terminated, i.e. whether a context->Terminate() has been issued for
that Rexx interpreter
instance,
o This assumes that if the Rexx interpreter needs to interrupt and end a
Rexx program, e.g.
because of a syntax condition that does not get trapped, the Rexx
interpreter will use
Terminate() on that Rexx interpreter instance. If the Rexx interpreter
ends a Rexx program
in error differently, then it would be important to learn somehow that
no Rexx interpreter
instances are usable anymore.
* The idea would be to add boolean field named isTerminated to the context
structure, which
initially is set to false. context->Terminate() then would change that
field to true.
o This way, native code will become able to learn whether the Rexx
interpreter instance is
still usable by merely inspecting that field in the context structure.
o In the AOO use case the native code in BSF4ooRexx would then become
able to learn whether a
callback into the Rexx interpreter instance would be safe or not, and
react accordingly
(e.g. raising an appropriate Java exception indicating the correct
cause), such that no
crash of ooRexx needs to occur anymore.
Would that yield a feasible, sensible solution?
---rony
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