I have actually used this in production for cooperative multitasking framework for Verifone VX510. I needed this to run multiple stuff at the same time (for ex

I have actually used this in production for cooperative multitasking framework for Verifone VX510. I needed this to run multiple stuff at the same time (for example printing while also doing network -- both serial devices on VX510). Could have done this with setjmp/longjmp but it would not be as fun:)