llvmpipe: move fences from per-bin to per-thread

Rather than inserting an lp_rast_fence command at the end of each
bin, have each rasterizer thread call this function directly once
it has run out of work to do on a particular scene.

This results in fewer calls to the mutex & related functions, but more
importantly makes it easier to recognize empty bins.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_scene.h b/src/gallium/drivers/llvmpipe/lp_scene.h
index 4e55d43174..fa1b311fa1 100644
--- a/src/gallium/drivers/llvmpipe/lp_scene.h
+++ b/src/gallium/drivers/llvmpipe/lp_scene.h
@@ -112,6 +112,7 @@ struct resource_ref {
  */
 struct lp_scene {
    struct pipe_context *pipe;
+   struct lp_fence *fence;
 
    /** the framebuffer to render the scene into */
    struct pipe_framebuffer_state fb;