3. The assembler implementation on Windows must be disallowed if the ABI bug reported by Holger is confirmed. As far as Windows provides a fiber implementation that is as efficient as the assembler one, the assembler implementation is not mandatory and the user of the provided Windows fiber is a preferable choice.
asm impl for windows should be ok - all boost_fcontext_t functions are leaf-functions using tail calls - concerns from Holger do apply only to non-leaf functions
If the bug is not confirmed, then your library would satisfy this point. I will just heard what Holger has to say.
I promised Oliver to get back to him last weekend -- but as usual something got in the way. I only managed to send him some notes this morning. I think there are a few things that would be worth looking into. In the particular example link_context/boost_fcontext_link is never called directly, so it's probably fine except for unwinding, which I think should be tackled differently. I've explained some concerns off-list and if I get a chance, I'll try out these cases. But that'll be a few days. Of couse, feel free to ping me off-list as it's pretty hard to keep up with the volume of mails on this list. Thanks! -hg