jhb 2007-03-09 16:27:11 UTC FreeBSD src repository
Modified files: sys/kern kern_lock.c kern_mutex.c kern_rwlock.c kern_sx.c sys/sys lock.h Log: Add two new function pointers 'lc_lock' and 'lc_unlock' to lock classes. These functions are intended to be used to drop a lock and then reacquire it when doing an sleep such as msleep(9). Both functions accept a 'struct lock_object *' as their first parameter. The 'lc_unlock' function returns an integer that is then passed as the second paramter to the subsequent 'lc_lock' function. This can be used to communicate state. For example, sx locks and rwlocks use this to indicate if the lock was share/read locked vs exclusive/write locked. Currently, spin mutexes and lockmgr locks do not provide working lc_lock and lc_unlock functions. Revision Changes Path 1.106 +19 -3 src/sys/kern/kern_lock.c 1.185 +40 -0 src/sys/kern/kern_mutex.c 1.18 +33 -0 src/sys/kern/kern_rwlock.c 1.38 +33 -0 src/sys/kern/kern_sx.c 1.65 +9 -0 src/sys/sys/lock.h _______________________________________________ cvs-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/cvs-all To unsubscribe, send any mail to "[EMAIL PROTECTED]"