From: Matt Brooks <mattbrooks@...>
Date: 2009-10-09T07:53:16+09:00
Subject: Green Threads - I want them to thrash...

All Day I have tried to accomplish the following using threads, and just
could not get it to work.  I want them to thrash back and forth having
the power to do stuff....

I want two threads to execute and fight each other to send commands to a
unit.  With each thread they just call methods with certain arguments.
I want them to send the commands at the same time.

I guess I am realizing that isn't possible, only one will have control
at a time, thats fine, I want them to pass control to each other
continously, seemingly randomly to me from the outside.

Also in both threads i have a forever loop.

so for example

a = Thread.new do
loop do
method that sends commands, about 60 of them
end
end


b = Thread.new do
loop do
method that sends different commands, about 20 of them
end
end



no matter what, thread a only runs a few commands before thead b takes
over forever, and thread a never executes again.

To combat the problem I tried doing this after the creation of the
threads, in main I guess you call it...

  loop do
  a.priority = -1
  b.priority = -2
  sleep(50)
  b.priority = -1
  a.priority = -2
  end


I also tried positioning Thread.pass randomly throughout the two
threads, hoping that would tell the thread, hey let the other guy have a
chance, then that thread would get to his Thread.pass meaning let the
first guy have a chance to send some stuff!!

All these ways have some outcome, just the second thread executes
forever....

Any ideas, thank you very much for the help!!
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