Hi Bruce, While studying a phenomenon with loading the JVM via rexx I stumbled over a MacOSX-Cocoa-specific problem. Studying the background of this problem yields the following situation: the main (first) thread must create a CFRunLoop, if GUI-related event handlers are to be used. For that reason, the JVM should be loaded in a separate thread such that if awt is being used the necessary interaction with the event loop can be established successfully.
Here an example <http://www.kxcad.net/cae_MATLAB/toolbox/compiler/f2-1010645.html> how one could initialize a shared library on a separate thread, such that the main thread can create and dispatch the CFRunLoop. Now the problem: the executable rexx and rexxc seem not to be aware of this particular MacOSX demand. As a result, if a Rexx script was invoked via the executable rexx and needs to load the JVM via BSF4ooRexx, then this would not work, if using awt (abstract window toolkit, the basic Java GUI classes, creating among other things the awt event thread) as rexx/rexxc would not create a CFRunLoop on the main-thread it seems (no awt event dispatching takes place, it is as if the awt event thread is not receiving any events). A solution - that demanded MacOSX expertise or at least "know-how" I am missing - would be, if the rexx/rexxc executables on MacOSX were able to create such a CFRunLoop, such that a JVM loaded on a separate thread can interface with it. (It seems that Apple has an "enveolope" technique to invoke console apps and GUI apps alike with an event based invocation, judging from a book "Cocoa Programming - A Quick-Start Guide for Developers" by Daniel H. Steinberg. But not sure about the standard files stdin, stdout, stderr and the like, hence the need for a true Mac expert.) Would it be possible, feasible for you to create such a MacOSX rexx/rexxc starter that was able to dispatch console and GUI Rexx programs alike? Maybe running the supplied Rexx script on another thread and waiting until that thread ends and then leaving the CFRunLoop, or something like that ? Regards, ---rony ------------------------------------------------------------------------------ The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb _______________________________________________ Oorexx-devel mailing list Oorexx-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/oorexx-devel
