[libvirt] PATCH: 12/28: Thread safety for UML driver
Daniel P. Berrange
berrange at redhat.com
Tue Dec 2 11:06:38 UTC 2008
On Tue, Dec 02, 2008 at 12:05:10PM +0100, Daniel Veillard wrote:
> On Sun, Nov 30, 2008 at 11:53:17PM +0000, Daniel P. Berrange wrote:
> > This patch makes the UML driver thread safe
>
> [...]
> > @@ -1395,21 +1485,27 @@ static int umlListDefinedDomains(virConn
> > struct uml_driver *driver = conn->privateData;
> > int got = 0, i;
> >
> > + umlDriverLock(driver);
> > for (i = 0 ; i < driver->domains.count && got < nnames ; i++) {
> > + virDomainObjLock(driver->domains.objs[i]);
> > if (!virDomainIsActive(driver->domains.objs[i])) {
> > if (!(names[got++] = strdup(driver->domains.objs[i]->def->name))) {
> > umlReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY,
> > "%s", _("failed to allocate space for VM name string"));
> > + virDomainObjUnlock(driver->domains.objs[i]);
> > goto cleanup;
> > }
> > }
> > + virDomainObjUnlock(driver->domains.objs[i]);
> > }
> > + umlDriverUnlock(driver);
> >
> > return got;
> >
> > cleanup:
>
> since this is an error code path, I would rather change the label to
> error: ...
That's a good idea - we should define a standard naming for this usage
'cleanup' to be used where error & normal conditions shared the same
exit path of a method.
'error' to be used where error path is completely separate from the
normal exit path.
Daniel
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