Siarhei Siamashka writes:
> This problem looks bad enough to me, or at least makes me feel uneasy.
> Changing
> how the caching works could also cause some weird problems in the future
> unless
> everything is carefully taken into account. Also various tools like helgrind
> will complain a lot
Siarhei Siamashka wrote:
I would suggest to generally forbid using the same pixman_image_t from multiple
threads, but also add a function for creating pixman_image_t clone, which
would share the pixel buffer with the original image and track pixel buffer
lifetime via thread-safe refcounting.
I
On Fri, 7 Jan 2011, Siarhei Siamashka wrote:
> I would suggest to generally forbid using the same pixman_image_t from
> multiple
> threads, but also add a function for creating pixman_image_t clone, which
> would share the pixel buffer with the original image and track pixel buffer
> lifetime vi
On Wednesday 05 January 2011 00:04:14 Soeren Sandmann wrote:
> There are really two separate things to consider: The first is which
> thread-related guarantees will pixman give? Adding atomic refcounts
> would add a new guarantee that multiple threads can do ref/unref
> simultaneously without causi
Siarhei Siamashka writes:
> An interesting question is whether atomic refcounting is the only fix
> required
> or it is just the tip of the iceberg?
>
> How the multithreaded rendering is supposed to be done with cairo/pixman? I
> can
> imagine several scenarios:
> a) Some set of images or i
On Thursday 23 December 2010 23:00:54 Christian Hergert wrote:
> Hi Folks,
>
> I've been using cairo to do some threaded rendering using an image surface.
> After the rendering completes, it is pushed to an Xlib surface via the Gtk+
> main loop. However, being that pixman_image_ref() and pixman_im
Christian Hergert writes:
> If I where to go through and work on making the reference counting
> thread safe, what things would I need to make sure I take into
> account for the patch to be accepted? For example:
I put up some notes on the subject here:
http://cgit.freedesktop.org/~sandman
Hi Folks,
I've been using cairo to do some threaded rendering using an image surface.
After the rendering completes, it is pushed to an Xlib surface via the Gtk+
main loop. However, being that pixman_image_ref() and pixman_image_unref()
use ++ and -- to increment and decrement ref counts, occasion
