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http://reviews.m5sim.org/r/21/
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Review request for Ruby Reviewers.


Summary
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ruby: get rid of RefCnt and Allocator stuff use base/refcnt.hh

This was somewhat tricky because the RefCnt API was somewhat odd.  The
biggest confusion was that the the RefCnt object's constructor that
took a TYPE& cloned the object.  I created an explicit virtual clone()
function for things that took advantage of this version of the
constructor.  I was conservative and used clone() when I was in doubt
of whether or not it was necessary.  I still think that there are
probably too many instances of clone(), but hopefully not too many.

I converted several instances of const MsgPtr & to a simple MsgPtr.
If the function wants to avoid the overhead of creating another
reference, then it should just use a regular pointer instead of a ref
counting ptr.

There were a couple of instances where refcounted objects were created
on the stack.  This seems pretty dangerous since if you ever
accidentally make a reference to that object with a ref counting
pointer, bad things are bound to happen.


Diffs
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  src/mem/gems_common/Allocator.hh 9ea24d102d66 
  src/mem/gems_common/RefCnt.hh 9ea24d102d66 
  src/mem/gems_common/RefCnt_tester.cc 9ea24d102d66 
  src/mem/gems_common/RefCountable.hh 9ea24d102d66 
  src/mem/gems_common/SConscript 9ea24d102d66 
  src/mem/ruby/buffers/MessageBuffer.hh 9ea24d102d66 
  src/mem/ruby/buffers/MessageBuffer.cc 9ea24d102d66 
  src/mem/ruby/common/Debug.hh 9ea24d102d66 
  src/mem/ruby/common/Debug.cc 9ea24d102d66 
  src/mem/ruby/network/garnet/fixed-pipeline/NetworkInterface_d.cc 9ea24d102d66 
  src/mem/ruby/network/garnet/fixed-pipeline/RoutingUnit_d.cc 9ea24d102d66 
  src/mem/ruby/network/garnet/flexible-pipeline/NetworkInterface.cc 
9ea24d102d66 
  src/mem/ruby/network/garnet/flexible-pipeline/Router.cc 9ea24d102d66 
  src/mem/ruby/network/simple/PerfectSwitch.cc 9ea24d102d66 
  src/mem/ruby/network/simple/Throttle.cc 9ea24d102d66 
  src/mem/ruby/slicc_interface/Message.hh 9ea24d102d66 
  src/mem/ruby/slicc_interface/NetworkMessage.hh 9ea24d102d66 
  src/mem/ruby/system/DMASequencer.cc 9ea24d102d66 
  src/mem/ruby/system/MemoryControl.cc 9ea24d102d66 
  src/mem/ruby/system/Sequencer.cc 9ea24d102d66 
  src/mem/slicc/ast/EnqueueStatementAST.py 9ea24d102d66 
  src/mem/slicc/symbols/Type.py 9ea24d102d66 

Diff: http://reviews.m5sim.org/r/21/diff


Testing
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All regressions pass


Thanks,

Nathan

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