FFI, signals and exceptions

[Edward Z. Yang]

Hello all,

I am currently investigating techniques to nicely handle SIGINTs when
FFI code is running.  Yes, I know it sounds kind of crazy.

Ignoring the problems of cleaning up the unceremoniously terminated C
computation, I'm having difficulty getting the FFI to /stop/ running
when I get the signal.  I currently have some code like this:

    http://hpaste.org/fastcgi/hpaste.fcgi/view?id=28422#a28422

which doesn't work, and which you guys can probably tell me doesn't
work. :-)  Throwing exceptions from the signal handler also doesn't work.

Any suggestions for GHC source code to look at / techniques to try?

Cheers,
Edward