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## The GRAS TODO list
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* generate block task loops with fixed lengths
** need a lookup/jump table
** prove that compiler does unrolling

* handle forecast
** not 100% sure here with the input/output edge case sizes
** forecast + input buffer accumulate

* smarter forecast
** tell user number of inputs, user says output reqs

* add hooks to specify input reserve
** automatically calculate from output multiple and rel rate

* handle calculating noutputitems using ninputs as a constraint

* python wrapper for block will come from grextras

* track memcpys for block usage stats

* runtime history, input/output multiple change?
** resend the hint to the allocator and possibly re-allocate
** should only do this on topology commit?

* hooks for setting the "active framework"
** set this before creating blocks to give them an affinity

* put this todo into wiki format checklist

* more thread safety
** all element internals should be accessed via message
and not directly from block::<method>

* create an input and output config struct (per port)
** idea is, we dont need so many API calls for a port
** set/get input/output config

* want per-port token_pool for inputs and outputs
** if ports get removed, this will release subscribers

* token check for top block stop
** fixes qa UDP so we dont wait for inert message