gallium: Unify reference counting.

The core reference counting code is centralized in p_refcnt.h.

This has some consequences related to struct pipe_buffer:

* The screen member of struct pipe_buffer must be initialized, or
  pipe_buffer_reference() will crash trying to destroy a buffer with reference
  count 0. u_simple_screen takes care of this, but I may have missed some of
  the drivers not using it.
* Except for rare exceptions deep in winsys code, buffers must always be
  allocated via pipe_buffer_create() or via screen->*buffer_create() rather
  than via winsys->*buffer_create().

1 files changed, 1 insertions, 1 deletions

diff --git a/src/gallium/auxiliary/sct/sct.c b/src/gallium/auxiliary/sct/sct.c
index 49bb7ea92e..fcfa04ef7d 100644
--- a/src/gallium/auxiliary/sct/sct.c
+++ b/src/gallium/auxiliary/sct/sct.c
@@ -372,7 +372,7 @@ sct_flush_textures(struct surface_context_tracker *sct,
 
    for (tl = ci->textures_used; tl; tl = next) {
       next = tl->next;
-      pipe_texture_release(&tl->texture);
+      pipe_texture_reference(&tl->texture, NULL);
       FREE(tl);
    }
    ci->textures_used = NULL;