1/**************************************************************************
2 *
3 * Copyright 2009 VMware, Inc.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28
29#ifndef LP_FENCE_H
30#define LP_FENCE_H
31
32
33#include "os/os_thread.h"
34#include "pipe/p_state.h"
35#include "util/u_inlines.h"
36
37
38struct pipe_screen;
39
40
41struct lp_fence
42{
43   struct pipe_reference reference;
44   unsigned id;
45
46   pipe_mutex mutex;
47   pipe_condvar signalled;
48
49   boolean issued;
50   unsigned rank;
51   unsigned count;
52};
53
54
55struct lp_fence *
56lp_fence_create(unsigned rank);
57
58
59void
60lp_fence_signal(struct lp_fence *fence);
61
62boolean
63lp_fence_signalled(struct lp_fence *fence);
64
65void
66lp_fence_wait(struct lp_fence *fence);
67
68void
69llvmpipe_init_screen_fence_funcs(struct pipe_screen *screen);
70
71
72void
73lp_fence_destroy(struct lp_fence *fence);
74
75static INLINE void
76lp_fence_reference(struct lp_fence **ptr,
77                   struct lp_fence *f)
78{
79   struct lp_fence *old = *ptr;
80
81   if (pipe_reference(&old->reference, &f->reference)) {
82      lp_fence_destroy(old);
83   }
84
85   *ptr = f;
86}
87
88static INLINE boolean
89lp_fence_issued(const struct lp_fence *fence)
90{
91   return fence->issued;
92}
93
94
95#endif /* LP_FENCE_H */
96