gallium: Change pipe->flush() interface to optionally return a fence.

The cell driver still uses an internal CELL_FLUSH_WAIT flag, in the long run
proper fencing should be implemented for it.

1 files changed, 31 insertions, 0 deletions

diff --git a/src/gallium/winsys/xlib/xm_winsys.c b/src/gallium/winsys/xlib/xm_winsys.c
index 7baaae295c5..c930a1d1963 100644
--- a/src/gallium/winsys/xlib/xm_winsys.c
+++ b/src/gallium/winsys/xlib/xm_winsys.c
@@ -570,6 +570,33 @@ xm_surface_release(struct pipe_winsys *winsys, struct pipe_surface **s)
 }
 
 
+/*
+ * Fence functions - basically nothing to do, as we don't create any actual
+ * fence objects.
+ */
+
+static void
+xm_fence_reference(struct pipe_winsys *sws, struct pipe_fence_handle **ptr,
+                   struct pipe_fence_handle *fence)
+{
+}
+
+
+static int
+xm_fence_signalled(struct pipe_winsys *sws, struct pipe_fence_handle *fence,
+                   unsigned flag)
+{
+   return 0;
+}
+
+
+static int
+xm_fence_finish(struct pipe_winsys *sws, struct pipe_fence_handle *fence,
+                unsigned flag)
+{
+   return 0;
+}
+
 
 /**
  * Return pointer to a pipe_winsys object.
@@ -603,6 +630,10 @@ xmesa_get_pipe_winsys_aub(struct xmesa_visual *xm_vis)
       ws->base.surface_alloc_storage = xm_surface_alloc_storage;
       ws->base.surface_release = xm_surface_release;
 
+      ws->fence_reference = xm_fence_reference;
+      ws->fence_signalled = xm_fence_signalled;
+      ws->fence_finish = xm_fence_finish;
+
       ws->base.flush_frontbuffer = xm_flush_frontbuffer;
       ws->base.printf = xm_printf;
       ws->base.get_name = xm_get_name;