CVSROOT: /cvs
Module name: src
Changes by: d...@cvs.openbsd.org 2015/09/11 13:13:22
Modified files:
sys/kern : kern_synch.c
share/man/man9 : Makefile
Added files:
sys/sys : refcnt.h
share/man/man9 : refcnt_init.9
Log message:
introduce a wrapper around reference counts called refcnt.
its basically atomic inc/dec, but it includes magical sleep code
in refcnt_finalise that is better written once than many times.
refcnt_finalise sleeps until all references are released and does
so with sleep_setup and sleep_finalize, which is fairly subtle.
putting this in now so i we can get on with work in the stack, a
proper discussion about visibility and how available intrinsics
should be in the kernel can happen after next week.
with help from guenther@
ok guenther@ deraadt@ mpi@
