On Thu, Oct 17, 2002 at 02:02:35PM +0200, Maciej W. Rozycki wrote: > On Thu, 17 Oct 2002, Gleb O. Raiko wrote: > > > Implement new sysmips then. > > I'm not sure if that's a good idea. Glibc alone uses test_and_set(), > exchange_and_add(), atomic_add() and compare_and_swap(). Do you want a > separate syscall for each of these functions? I think the ll/sc emulation > may be the best solution after all. At least it's most flexible and not > much slower if at all. Depends on your usage pattern. E.g. we don't run software that uses atomicity.h (i.e. no C++ code), but heavily use pthread_mutex_lock() etc. The few uses of atomicity.h internal to glibc don't warrant any optimizations. So, if the beql-Method would not exist, I would consider implementing a new sysmips for compare_and_swap(). Regards, Johannes
