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, 5 insertions, 5 deletions

diff --git a/src/mesa/state_tracker/st_texture.c b/src/mesa/state_tracker/st_texture.c
index fcf76ef82e8..79a4bd84d01 100644
--- a/src/mesa/state_tracker/st_texture.c
+++ b/src/mesa/state_tracker/st_texture.c
@@ -108,7 +108,7 @@ st_texture_create(struct st_context *st,
 
    newtex = screen->texture_create(screen, &pt);
 
-   assert(!newtex || newtex->refcount == 1);
+   assert(!newtex || newtex->reference.count == 1);
 
    return newtex;
 }
@@ -219,7 +219,7 @@ st_texture_image_unmap(struct st_context *st,
 
    screen->transfer_unmap(screen, stImage->transfer);
 
-   screen->tex_transfer_release(screen, &stImage->transfer);
+   screen->tex_transfer_destroy(stImage->transfer);
 }
 
 
@@ -284,7 +284,7 @@ st_texture_image_data(struct pipe_context *pipe,
 		      0, 0,                             /* source x, y */
 		      dst->width[level], dst->height[level]);       /* width, height */
 
-      screen->tex_transfer_release(screen, &dst_transfer);
+      screen->tex_transfer_destroy(dst_transfer);
 
       srcUB += src_image_stride;
    }
@@ -350,8 +350,8 @@ st_texture_image_copy(struct pipe_context *pipe,
 			 0, 0, /* srcX, Y */
 			 width, height);
 
-      screen->tex_surface_release(screen, &src_surface);
-      screen->tex_surface_release(screen, &dst_surface);
+      pipe_surface_reference(&src_surface, NULL);
+      pipe_surface_reference(&dst_surface, NULL);
    }
 }