concurrency

[Bulat Ziganshin]

Hello all,

Haskell implementation can have one of 4 levels of concurrency
support:

1) no support at all
2) emulation of concurrency primitives ("blocked" ffi calls, MVar via
IORef and so on)
3) cooperative concurrency
4) preemptive concurrency

imho, it would be great to prohibit 1) and define requirements to the
2)-4) in the standard


-- 
Best regards,
 Bulat                            mailto:Bulat.Ziganshin at gmail.com