James Morrison <[EMAIL PROTECTED]> writes: > Ok, I'm not too sure what is going on with host_info and > xxx_host_info, but it seems that xxx_host_info is call to the kernel > without using mig, but host_info is an interface created by mig. So > with host_info the struct is copied to the user process, where in > xxx_host_info the struct is simply given to the user process. Am I > understanding any of this?
No, it's just what I told you. These are two different interfaces, both MiG. xxx_host_info uses an old miserable interface, which has a fixed-size struct. That's a miserable interface, because any time a new element needs to be added, you'd need to use a new RPC. host_info uses a much better interface, in which the user tells the kernel how many items it wants returned in the struct; as a result, older users get perfect upward compatibility, provided new items are always added onto the end. _______________________________________________ Help-hurd mailing list [EMAIL PROTECTED] http://mail.gnu.org/mailman/listinfo/help-hurd
