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, 2 insertions, 2 deletions

diff --git a/src/gallium/auxiliary/draw/draw_pipe_pstipple.c b/src/gallium/auxiliary/draw/draw_pipe_pstipple.c
index e68c824c86..fa7bc67476 100644
--- a/src/gallium/auxiliary/draw/draw_pipe_pstipple.c
+++ b/src/gallium/auxiliary/draw/draw_pipe_pstipple.c
@@ -406,7 +406,7 @@ pstip_update_texture(struct pstip_stage *pstip)
 
    /* unmap */
    screen->transfer_unmap(screen, transfer);
-   screen->tex_transfer_release(screen, &transfer);
+   screen->tex_transfer_destroy(transfer);
 }
 
 
@@ -572,7 +572,7 @@ pstip_destroy(struct draw_stage *stage)
 
    pstip->pipe->delete_sampler_state(pstip->pipe, pstip->sampler_cso);
 
-   pipe_texture_release(&pstip->texture);
+   pipe_texture_reference(&pstip->texture, NULL);
 
    draw_free_temp_verts( stage );
    FREE( stage );