From: Venkat Akkineni <venkatram.akkineni@...>
Date: 2010-12-21T07:24:36+09:00
Subject: Re: background threads

Hello Robert


Thanks for your code and help. By commenting a few lines in your code I
will try to make my argument.


if you comment out the following lines in the code above. You will 
notice
that the thread exists only momentarily even with the join. It won't
even print the "Background" the first time.

#10.times do |i|
 #  printf "%-20s %5d\n", "Foreground", i
  # sleep 3
#end

While I could use a loop like the one above, it will stop all execution 
at that point until the hamster has run its length. How can I change the 
code so that the main thread respects the currently running thread and 
let it do its thing before it exists. Notice that I have read the 
documentation and understand that when main thread exits it will kill 
all the running threads.

Also my code attached to the email. It is a simple window class
that uses SDL. SDL window stays alive as long as there is a loop right
next to window initialization.

-> When add the loop in a method and call it from some where else . The
execution stops at the line I am calling it.
-> So I thought creating a new thread will help, but when I create a
thread window appears for an instant and disappears.
-> I try adding thread.join right after creating an instance of a class
that encloses window creation. This causes freezing of the execution at
thread.join

I am pretty sure that I am going about this the wrong way but not sure 
what is the right way.

Thanks
Venkat

Attachments:
http://www.ruby-forum.com/attachment/5607/window.rb


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