I got bitten porting code to Windows that use setjmp/longjmp not only for exception handling (more correctly: non-local control transfer -- the exception was ac

I got bitten porting code to Windows that use setjmp/longjmp not only for exception handling (more correctly: non-local control transfer -- the exception was actually handled by then), but also for implementing a thread library. The code worked literally everywhere else, but it turned out that on Windows longjmp doesn't just load the registers from the buffer but also does some SEH bollocks. If I recall (and this was in 2006), it didn't matter for the exception handling, but it was a hard crash for switching threads. So I had to write my own setjmp/longjmp for Windows in assembly language (i.e copy theirs and cut out the SEH bollocks).