At 8:33 Uhr -0400 25.07.2006, Marc Feeley wrote:
There is an internal procedure for doing this. It is called ##open- predefined and you can use it like this:
Thanks, that works fine.
My working version of Gambit has preliminary support for UDP and RAW sockets.
Perfect. (I may want to use udp for something like (or communication to) memcached, or other things (I've used UDP for monitoring purposes in the past). It's not urgent.)
Maybe I should ask (instead of the above) how one can, from a C function, read/write from/to a file descriptor without blocking the system (using the scheduler, thus possibly running other scheme code in the mean time).
One way it to use ##open-predefined and have the C code call into Scheme. Why do you need this? There is not a general solution that will work in all situations.
One thing I've thought about is libraries like libmysql; but the problem with libmysql is that IIRC one cannot (without patching) make it call other functions for reading/writing, which makes it pretty hopeless probably, leaving only using pthread magic as solution for running multiple mysql connections in parallel in one Gambit. But I've pretty much decided to use forking/multiprocessing instead of multithreading for my web stuff for now, so that's no problem.
Christian.