[plt-scheme] threads and mzscheme

Matthew Flatt schreef:

>Threads are essentially continuation-based. There's just one system
>thread, and MzScheme has its own scheduler (hierarchical, round-robin)
>to swap Scheme continuations/threads.
>  
>
This is probably where the pain is! I'm making a call to C for the 
database connection, which
will probably block the mzscheme threading system! I'll probably want to 
make the database
call asynchronous and wait on a semaphore in mzscheme for the database 
to return with a
result ( I'll need to change sqli :(( ).

>I have the same questions as Eli: How are tasks communicated to the
>worker thread? How are MzScheme and the database communicating?
>  
>
Please have a look at my previous post.

>Matthew
>
>  
>
Thanks,

Hans Oesterholt.