On Tuesday, January 31, 2012 6:35:08 am [email protected] wrote: > Hello, > Could someone please explain why mtx_trylock() must not be called on a spin > mutex? > Is it conceptually wrong or is it a restriction of FreeBSD kernel > implementation?
The current mutex API generally uses different methods for the different types of mutexes (at some point I may split spin locks out into a completely separate API to simplify things). If we wanted to do trylocks on spinlocks, then a new mtx_trylock_spin() method would be added as you've done. To date we haven't had any use cases for trylock operations on a spin lock. Even try locks on other locking primitives are used fairly rarely. -- John Baldwin _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[email protected]"
