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
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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
38 struct pipe_screen;
39
40
41 struct lp_fence
42 {
43 struct pipe_reference reference;
44 unsigned id;
45
46 mtx_t mutex;
47 cnd_t signalled;
48
49 boolean issued;
50 unsigned rank;
51 unsigned count;
52 };
53
54
55 struct lp_fence *
56 lp_fence_create(unsigned rank);
57
58
59 void
60 lp_fence_signal(struct lp_fence *fence);
61
62 boolean
63 lp_fence_signalled(struct lp_fence *fence);
64
65 void
66 lp_fence_wait(struct lp_fence *fence);
67
68 void
69 llvmpipe_init_screen_fence_funcs(struct pipe_screen *screen);
70
71
72 void
73 lp_fence_destroy(struct lp_fence *fence);
74
75 static inline void
lp_fence_reference(struct lp_fence ** ptr,struct lp_fence * f)76 lp_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
88 static inline boolean
lp_fence_issued(const struct lp_fence * fence)89 lp_fence_issued(const struct lp_fence *fence)
90 {
91 return fence->issued;
92 }
93
94
95 #endif /* LP_FENCE_H */
96