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* future: Add a race-free way to examine a partial computation.Tavian Barnes2014-04-231-4/+100
| | | | | | This allows safe OpenGL previews, for example. dmnsn_future* learned the dmnsn_future_{pause,resume}() functions which cause all worker threads to block. render.test now survives Helgrind with no errors.
* Don't use pointer indirection to emulate mutable for futures.Tavian Barnes2013-03-191-35/+34
| | | | We can just cast away the const, as they're all on the heap anyway.
* Simplify future implementation.Tavian Barnes2013-03-191-27/+25
| | | | | A read-write lock was a bad idea, as most consumers are probably writers, not readers.
* Rename progress objects to future objects.Tavian Barnes2011-10-191-0/+164