[Haskell-cafe] POSIX AIO (asych I/O) ...

[Bulat Ziganshin]

Hello Vasili,

Tuesday, July 1, 2008, 11:42:26 AM, you wrote:

looks ok, show us your peek/poke code


> Hello,

>        I am also testing my aio support. The aio_write binding
> seems to work ok .. as well as aio_error, Aio_return is a problem
> child. I think I wrote a really simple binding. I always receive
> nbytes as 0. I have been staring at the code hoping to catch a
> stupid mistake. I put putStrLn's in the code. .....Here is the code ...
>  
> aioReturn :: AIOCB -> IO (AIOCB, ByteCount)
> aioReturn aiocb = do
>    allocaBytes (#const sizeof(struct aiocb)) $ \ p_aiocb -> do
>       poke p_aiocb aiocb
>       count <- throwErrnoIfMinus1 "aioReturn" (c_aio_return  p_aiocb)
>        aiocb <- peek p_aiocb
>       return (aiocb, fromIntegral count)

> foreign import ccall safe "aio.h aio_return"
>     c_aio_return :: Ptr AIOCB -> IO CInt

> Maybe someone can spot something that I haven't. 
>  
> Thanks, Vasili
>   


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