Ahn Ki-yung wrote:
C call blocks the whole process, and Concurret
module become meaningless. Isn't there any
library or wrapper that can avoid ccall from
blocking entire process ?
There is an extension to the GHC runtime system in the CVS version which
addresses this problem, but that means you have to compile a prerelease
version of GHC yourself (and pass a special ./configure flag,
--enable-threaded-rts).
The only other way I could think of would be to write a C language
module that uses pthreads to achieve the purpose (has to be mostly in C
because you mustn't enter the Haskell runtime system from a second
thread).
Cheers,
Wolfgang
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