Hello Vasili, Monday, June 9, 2008, 6:17:14 AM, you wrote: 1. standard place to import FunPtr from is Foreign.Ptr, not System.Posix 2. FunPtr is exported as abstract type, without constructors. you can't construct values of this type directly. instead you should use "wrapper" generators as in the example that Clause has wrote. read it carefully :)
Hello,
I am getting what is to me a mysterious error in a test case that I am writing: vigalchin@ubuntu:~/FTP/Haskell/unix-2.2.0.0/tests/timer$ runhaskell Setup.lhs build Preprocessing executables for Test-1.0... Building Test-1.0... [1 of 1] Compiling Main ( ./timer.hs, dist/build/timer/timer-tmp/Main.o )
./timer.hs:11:45: Not in scope: data constructor `FunPtr'
It seems like the compiler is complaining about the lack of FunPtr in it's symbol table but System.Posix is imported:
module Main where
import System.Posix import Foreign import Foreign.C import Foreign.Ptr
main = do
let event = Sigevent{sigevFunction=(FunPtr (notifyFunc))} <<<<<< error here
timerId <- timerCreate Clock_Realtime Nothing
timerDelete timerId
return ()
notifyFunc :: Sigval -> IO () notifyFunc sigval = do putStrLn "timer POP!!!!!!!" return ()
I am probably looking right at the answer and not seeing it. ??
Thanks, Vasili
-- Best regards, Bulat mailto:Bulat.Ziganshin@gmail.com