From: Ralph Shnelvar <ralphs@...32.com>
Date: 2010-09-29T10:22:48+09:00
Subject: Calling a method in the context of a specific thread

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Background:

I am writing an FXRuby program.  My question should be independent of FXRuby, though.

FXRuby is a GUI for Ruby.

If I understand some of the comments made here (and I probably don't) [see subject: interpreter cannot enter in the context from another thread] it is a bad thing to attempt to run an FXRuby function in a non-main thread.




So ... I have a non-main thread that wants to display a message box (i.e. "call" FXMessageBox").

How can I invoke FXMessageBox in the context of the main thread?



I can think of all sorts of ugly solutions.

For instance:

1) Set some global_variable indicating the task I want to perform in the main thread.
2) Do a thread.stop
3) have a timer in the main thread and have it dispatch based on global_variable
4) save the return code of FXMessageBox in a thread local variable the not-main-thread 
5) Do a thread.run to wake up the stopped not-main-thread.


Ugly!
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