[Libvir] PATCH: Fix and cleanup ref counting/ domain/network object release

Daniel P. Berrange berrange at redhat.com
Mon Jan 21 15:12:06 UTC 2008

On Mon, Jan 21, 2008 at 02:57:37PM +0000, Richard W.M. Jones wrote:
> Daniel P. Berrange wrote:
> >The problem is that we need to use pthread_t / pthread_create APIs for
> >other parts of libvirt. libxml2 doesn't provide any portability layer
> >for threads - only for mutexes. Any platform which has pthread_t, already
> >has pthread_mutex_t, so although in theory the pthread_mutex_t is less
> >portable than xmlMutex, in practice the overall portability is the same
> >due to the constraint of needing pthread_t.
> Don't be forgetting about Windows.  MinGW has a pthread API, and Red Hat 
> also have one[1].  Whether they are the same or not I haven't found out yet.

Luckily the thread stuff should not be used in the remote driver - only
the xen/qemu/storage drivers, so we ought not to have to worry about that
(until we port the real drivers to windows :-)

> The one thing I noticed is you need to be careful about pthread_t : on 
> Unix this is usually an int of some sort, but on Windows it's a 
> structure.  You might also want to check [2] for some gotchas, 
> particularly around thread cancellation.

Yeah, thread cancellation is a horibble thing that I intend to  stay
away from.

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