After this patch blocks are maintained much like CRefs are, as a stack of linked lists. This does not do anything to correct our current block semantics, which are not quite 100% (I'm getting "yield without block" errors in Rails right now), but it should make it a little more straightforward to manage blocks. It also eliminates ThreadContext callers from having to maintain the "previous" block as they did before, which was error-prone.
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Charles Oliver Nutter @ headius.blogspot.com
JRuby Developer @ jruby.sourceforge.net
Application Architect @ www.ventera.com
eliminate_blockstack_2.patch
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