[Haskell-cafe] carry "state" around ....

Brandon S. Allbery KF8NH allbery at ece.cmu.edu
Mon Jul 28 02:09:19 EDT 2008

On 2008 Jul 28, at 1:54, Galchin, Vasili wrote:

>    allocaBytes (#const sizeof(struct aiocb)) $ \ p_aiocb -> do
>       poke p_aiocb aiocb

As I understand it, you can't do this;you must use the same aiocb  
throughout (that is, the same chunk of memory, not merely the same  
values; there is quite possibly a kernel mapping to it which you can't  
change or copy, or a pointer to the original aiocb is kept as internal  
state in the aio library so it can update the errno and result on the  

brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery at kf8nh.com
system administrator [openafs,heimdal,too many hats] allbery at ece.cmu.edu
electrical and computer engineering, carnegie mellon university    KF8NH

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