[PATCH 7/9] poller: allow to restrict the poller frequency

[Jean-Christophe PLAGNIOL-VILLARD]

On 11:42 Mon 05 Jan     , Sascha Hauer wrote:
> On Tue, Dec 23, 2014 at 07:21:56PM +0100, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > so we do not slow down barebox on too much polling
> > specialy on USB drivers
> > 
> > Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
> > ---
> >  common/poller.c  | 11 ++++++++++-
> >  include/poller.h |  3 +++
> >  2 files changed, 13 insertions(+), 1 deletion(-)
> 
> Could you repost this along with the first user?

I'm finishing to clean the USB HID driver that will use it

Best Regards,
J.
> 
> > 
> > diff --git a/common/poller.c b/common/poller.c
> > index 496636d..58b105d 100644
> > --- a/common/poller.c
> > +++ b/common/poller.c
> > @@ -24,6 +24,9 @@ int poller_register(struct poller_struct *poller)
> >  	list_add_tail(&poller->list, &poller_list);
> >  	poller->registered = 1;
> >  
> > +	if (poller->frequency)
> > +		poller->poll_next = get_time_ns();
> > +
> >  	return 0;
> >  }
> >  
> > @@ -96,8 +99,14 @@ void poller_call(void)
> >  
> >  	poller_active = 1;
> >  
> > -	list_for_each_entry_safe(poller, tmp, &poller_list, list)
> > +	list_for_each_entry_safe(poller, tmp, &poller_list, list) {
> > +
> > +		if (poller->frequency && get_time_ns() < poller->poll_next)
> > +			continue;
> >  		poller->func(poller);
> > +		if (poller->frequency)
> > +			poller->poll_next += poller->frequency;
> > +	}
> >  
> >  	poller_active = 0;
> >  }
> > diff --git a/include/poller.h b/include/poller.h
> > index cda5b57..3568a80 100644
> > --- a/include/poller.h
> > +++ b/include/poller.h
> > @@ -14,6 +14,9 @@ struct poller_struct {
> >  	void (*func)(struct poller_struct *poller);
> >  	int registered;
> >  	struct list_head list;
> > +
> > +	uint64_t frequency;
> > +	uint64_t poll_next;
> >  };
> 
> Could you reorder the fields in struct poller_struct by fields which
> should be initialized by users and internal fields? This was not exactly
> clear before this patch, but this patch introduces another two fields,
> from which one must be initialized by the user and the other one not.
> 
> Sascha
> 
> -- 
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