Date: Mon, 12 Mar 2007 19:56:38 +0100 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: John Baldwin <jhb@freebsd.org> Cc: Attilio Rao <attilio@freebsd.org>, cvs-src@freebsd.org, src-committers@freebsd.org, cvs-all@freebsd.org Subject: Re: cvs commit: src/share/man/man9 Makefile condvar.9 lock.9 mi_switch.9 mtx_pool.9 mutex.9 rwlock.9 sleep.9 sleepqueue.9 sx.9 thread_exit.9 src/sys/kern kern_synch.c src/sys/sys mutex.h rwlock.h sleepqueue.h sx.h systm.h Message-ID: <20070312185638.GA5688@garage.freebsd.pl> In-Reply-To: <200703121116.24667.jhb@freebsd.org> References: <200703092241.l29Mf2Ds062856@repoman.freebsd.org> <3bbf2fe10703100344w1f2464f0q68086a5af7c4f63c@mail.gmail.com> <20070310205236.GA9185@garage.freebsd.pl> <200703121116.24667.jhb@freebsd.org>
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On Mon, Mar 12, 2007 at 11:16:23AM -0400, John Baldwin wrote:
> On Saturday 10 March 2007 15:52, Pawel Jakub Dawidek wrote:
> > What about something like this:
> >=20
> > #define cv_wait(cv, lock) do {
> > switch (LO_CLASSINDEX((struct lock_object *)(lock))) {
>=20
> The problem with a cast is you use type checking. Might as well do this:
>=20
> #define cv_wait(cv, lock) _cv_wait((cv), (struct lock_object *)(lock))
This will skip type checking and my version only cast to provide type
checking, so when you pass some random variable it will give you an
error.
> > PS. I'd really like to be able to use condvar(9) with sx(9) locks,
> > because currently I've to manage mu own condvar(9) version for ZFS
> > that does exactly this.
>=20
> The patch is already done in //depot/jhb/lock/..., just need to settle on=
the=20
> API.
Ok, good.
--=20
Pawel Jakub Dawidek http://www.wheel.pl
pjd@FreeBSD.org http://www.FreeBSD.org
FreeBSD committer Am I Evil? Yes, I Am!
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