1/**********************************************************
2 * Copyright 2009 VMware, Inc.  All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without
7 * restriction, including without limitation the rights to use, copy,
8 * modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 *
24 **********************************************************/
25
26
27#include "svga_cmd.h"
28#include "util/u_debug.h"
29#include "util/u_memory.h"
30
31#include "vmw_surface.h"
32#include "vmw_screen.h"
33
34void
35vmw_svga_winsys_surface_reference(struct vmw_svga_winsys_surface **pdst,
36                                  struct vmw_svga_winsys_surface *src)
37{
38   struct pipe_reference *src_ref;
39   struct pipe_reference *dst_ref;
40   struct vmw_svga_winsys_surface *dst;
41
42   if(pdst == NULL || *pdst == src)
43      return;
44
45   dst = *pdst;
46
47   src_ref = src ? &src->refcnt : NULL;
48   dst_ref = dst ? &dst->refcnt : NULL;
49
50   if (pipe_reference(dst_ref, src_ref)) {
51      vmw_ioctl_surface_destroy(dst->screen, dst->sid);
52#ifdef DEBUG
53      /* to detect dangling pointers */
54      assert(p_atomic_read(&dst->validated) == 0);
55      dst->sid = SVGA3D_INVALID_ID;
56#endif
57      FREE(dst);
58   }
59
60   *pdst = src;
61}
62