Support Ruby 1.9 GIL, for cases where exact thread behavior compatibility is 
important
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                 Key: JRUBY-1804
                 URL: http://jira.codehaus.org/browse/JRUBY-1804
             Project: JRuby
          Issue Type: New Feature
            Reporter: Charles Oliver Nutter
            Assignee: Thomas E Enebo
             Fix For: JRuby 1.1


Ruby 1.9 threads are all native, but lock on a GIL (Giant Interpreter Lock). We 
could provide similar support in JRuby using the normal thread checkpointing we 
use for thread events. It would not be particularly difficult to add, and for 
cases where JRuby needs to have identical behavior to Ruby 1.9 (and really, to 
Ruby 1.8) it could prove useful.

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