[omniORB] ActiveX

[Sai-Lai Lo]

With 2.7.1, all the internal threads should have been exited if the
application calls BOA::destroy(). The outScavenger thread is clean up by
the dtor of a global initialiser.

That is the theory. In practice, we found that the dtor of the global
initialiser is not called when VB unload the DLL. Also the behaviour seems
to differ with Windows 95/98 than Windows NT. Your notes describe the
workaround that has to be done.

With 2.8.0 (pre2 at the moment), a new method ORB::NP_destroy() is
added. The outScavenger is no longer clean-up by a dtor but directly as
part of the NP_destroy(). The prefix NP_ means it is non-portable.  With
the upcoming POA, there is a proper API to shutdown the ORB so applications
just have to replace the call to NP_destroy() with the right one.
To summarise, the proper way to shutdown is:
     CORBA::BOA_ptr boa;
     CORBA::ORB_ptr orb;
       ...
     boa->destroy();
     orb->NP_destroy();

Sai-Lai


>>>>> Wittig, Juergen writes:

> this is probably due to the scanvenger thread still running in your
> control, which will prohibit orderly control shutdown.

> Try running without the scanvenger

>> Yes, if I turn the "out scavenger" thread off by passing command line 
>> option "-ORBoutConScanPeriod 0" to ORB_init this problem doesn't 
>> occur. Thanks for this suggestion!

> Alternatively, shut the scanvenger thread down before you close the control

>> To stop the "out scavenger" thread prior to returning to VB (rather than
> just 
>> not starting it in the first place by using "-ORBoutConScanPeriod 0" 
>> as below) call "StrandScavenger::killOutScavenger();" the include for 
>> this is <scavenger.h> which is in 
>> ".../omniORB_2.7.1/src/lib/omniORB2/orbcore" in the directory tree.




-- 
Sai-Lai Lo                                   S.Lo@uk.research.att.com
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