On 01-May-2002 Alfred Perlstein wrote: > * Nelson, Trent . <[EMAIL PROTECTED]> [020501 06:41] wrote: >> Hi, >> >> I'm working on porting the Linux Cisco VPN client kernel module to >> FreeBSD. The API interface between the OS and their actual driver has four >> spinlock functions that operate around a handle (void *) to a ``critical >> section'': >> >> CNI_free_spin_lock >> CNI_new_spin_lock >> CNI_spin_lock >> CNI_spin_unlock >> >> Funnily enough, these wrap the Linux spinlock_t/spin_lock*() >> functionality quite nicely. Does the FreeBSD kernel offer such a trivial >> spinlock facility? If not, could anyone suggest what type of locking >> mechanism would best be used? > > man 9 mutex, see the MTX_SPIN section, but you might not need it.
Actually, a normal mutex would probably be best. On stable these would be nops. On current I would use a MTX_DEF mutex. -- John Baldwin <[EMAIL PROTECTED]> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
