On 15 November 2010 18:10, Luigi Rizzo <ri...@iet.unipi.it> wrote: > 2. [generic] passing pointers between userland and kernel > requires remapping the pointer when going up or down. > As the mapping would be application specific, i don't > see much use in allowing room for a pointer without kernel code > to map userland <-> kernel pointers.
I'm not thinking of passing a *working* pointer into the kernel but used as a cookie, similar to how it's used in kqueue: the intention being the application can send and get a pointer which means something to the application, not something usable to the kernel. Without using intptr_t, if an application wants to hang a structure on the cookie, it needs to maintain its own translation table (index-to-pointer). _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
