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 "util/u_thread.h"
34 #include "pipe/p_state.h"
35 #include "util/u_inlines.h"
36
37
38 struct pipe_screen;
39
40 enum lp_fence_type
41 {
42 LP_FENCE_TYPE_SW,
43 LP_FENCE_TYPE_SYNC_FD,
44 };
45
46
47 struct lp_fence
48 {
49 struct pipe_reference reference;
50 enum lp_fence_type type;
51 unsigned id;
52
53 mtx_t mutex;
54 cnd_t signalled;
55
56 bool issued;
57 unsigned rank;
58 unsigned count;
59
60 int sync_fd;
61 };
62
63
64 struct lp_fence *
65 lp_fence_create(unsigned rank);
66
67
68 void
69 lp_fence_signal(struct lp_fence *fence);
70
71 bool
72 lp_fence_signalled(struct lp_fence *fence);
73
74 void
75 lp_fence_wait(struct lp_fence *fence);
76
77 bool
78 lp_fence_timedwait(struct lp_fence *fence, uint64_t timeout);
79
80 void
81 llvmpipe_init_screen_fence_funcs(struct pipe_screen *screen);
82
83
84 void
85 lp_fence_destroy(struct lp_fence *fence);
86
87 static inline void
lp_fence_reference(struct lp_fence ** ptr,struct lp_fence * f)88 lp_fence_reference(struct lp_fence **ptr,
89 struct lp_fence *f)
90 {
91 struct lp_fence *old = *ptr;
92
93 if (pipe_reference(&old->reference, &f->reference)) {
94 lp_fence_destroy(old);
95 }
96
97 *ptr = f;
98 }
99
100 static inline bool
lp_fence_issued(const struct lp_fence * fence)101 lp_fence_issued(const struct lp_fence *fence)
102 {
103 return fence->issued;
104 }
105
106 #ifdef HAVE_LIBDRM
107 void
108 llvmpipe_init_screen_fence_funcs(struct pipe_screen *pscreen);
109
110 void
111 llvmpipe_init_fence_funcs(struct pipe_context *pipe);
112 #endif
113
114 #endif /* LP_FENCE_H */
115