Andrey Chernov writes: > > Look at the function random_yarrow_unblock(). Thats where yopu want to > > be doing this. This function is where the random device is unblocked > > once safely seeded. > > Thanx for your hint, but I fear one moment using random_yarrow_unblock(). > It is called under mtx_lock(&random_reseed_mtx) in reseed(). > And when arc4rand() seeding is called, it uses read_random(), so I see > possible deadlock can happens.
The usual way round this is with a flag. Set a static, volatile flag, defaulting "off", and set it to "on" when the seeding has happened. Then arc4random() can do the right thing, depending on this flag. > In my version arc4rand() seeding happens only when this lock is released, > so no blocking is possible. Sure, but the dependancies created are problematic in their own right. M -- Mark R V Murray Cert APS(Open) Dip Phys(Open) BSc Open(Open) BSc(Hons)(Open) Pi: 132511160 _______________________________________________ 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"
