Foreign Function Interface (FFI)

[Rafael Martinez Torres]

HI:

Reading Haskell 98 FFI report, one question arised:

Imported and declared a foreign function , via

foreign import ccall foo:: IO(CInt)

Is it guaranteed to be executed in atomic way ? I mean , should it
block the whole STG system ?

Idea: To implement a monitor , in a "external context" , and threads
around him to access it, bypassing the Mvar paramter-pass among them...