Subject: Re: Semaphore on NetBSD work or no ?
To: None <email@example.com, firstname.lastname@example.org>
From: Daniel Dias Gonçalves <email@example.com>
Date: 01/27/2003 18:24:05
I installed the NetBSD-current and freeradius 0.8.1 compiled without
problems. The server is ok.
Thanks the people who had answered mine e-mails.
Daniel Dias Gonçalves
On Mon, 27 Jan 2003 13:07:47 -0500, David Maxwell <firstname.lastname@example.org> wrote :
> On Sun, Jan 26, 2003 at 10:15:50AM -0800, Jason R Thorpe wrote:
> > On Sun, Jan 26, 2003 at 10:39:55AM -0000, Daniel Dias Gonçalves wrote:
> > > I compiled freeradius 0.8.1 in NetBSD 1.6 but when I go run it
> > > the following error:
> > >
> > > # radiusd
> > > Sun Jan 26 10:22:39 2003 : Info: Starting - reading
> > > configuration files ...
> > > /usr/local/lib/rlm_sql-0.8.1.so: Undefined PLT symbol "sem_init"
> > > (reloc type = 7, symnum = 54)
> > > #
> > They're supported in NetBSD-current (1.6M and later), but not 1.6.
> I asked Alan DeKok, primary maintainer of Freeradius:
> Is sem_init needed - or only for sql backend support perhaps?
> and he said to me:
> They're used because they're simpler than pthread_mutex's. They can
> (and should) be replaced with pthread_mutex calls.
> So, if I understand correctly, Freeradius uses semaphores because
> (a) it needs to implement thread-safe locking in signal handlers
> (b) The semaphore API is significantly simpler than pthread_mutex
> (c) The Linux pthreads (currently do, but) won't guarantee signal
> delivery to the right thread.
> I believe our pthreads does guarantee signal delivery to the right
> thread (over and above the POSIX spec, which doesn't require that) - and
> Alan says that if that's the case, he can #ifndef __NetBSD__ all of the
> semaphore code in the Freeradius distribution.
> I'll work with him to test that approach under 1.6 (where NetBSD pthreads
> don't apply) and -current.
> David Maxwell, email@example.comfirstname.lastname@example.org -->
> If you don't spend energy getting what you want,
> You'll have to spend it dealing with what you get.
> - Unknown