1 /**************************************************************************
3 * Copyright 2009 VMware, Inc.
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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.
26 **************************************************************************/
29 #include "pipe/p_screen.h"
30 #include "util/u_memory.h"
35 lp_fence_create(unsigned rank
)
37 struct lp_fence
*fence
= CALLOC_STRUCT(lp_fence
);
39 pipe_reference_init(&fence
->reference
, 1);
41 pipe_mutex_init(fence
->mutex
);
42 pipe_condvar_init(fence
->signalled
);
51 lp_fence_destroy(struct lp_fence
*fence
)
53 pipe_mutex_destroy(fence
->mutex
);
54 pipe_condvar_destroy(fence
->signalled
);
60 llvmpipe_fence_reference(struct pipe_screen
*screen
,
61 struct pipe_fence_handle
**ptr
,
62 struct pipe_fence_handle
*fence
)
64 struct lp_fence
*old
= (struct lp_fence
*) *ptr
;
65 struct lp_fence
*f
= (struct lp_fence
*) fence
;
67 if (pipe_reference((struct pipe_reference
**)ptr
, &f
->reference
)) {
68 lp_fence_destroy(old
);
74 llvmpipe_fence_signalled(struct pipe_screen
*screen
,
75 struct pipe_fence_handle
*fence
,
78 struct lp_fence
*f
= (struct lp_fence
*) fence
;
80 return f
->count
== f
->rank
;
85 llvmpipe_fence_finish(struct pipe_screen
*screen
,
86 struct pipe_fence_handle
*fence_handle
,
89 struct lp_fence
*fence
= (struct lp_fence
*) fence_handle
;
91 pipe_mutex_lock(fence
->mutex
);
92 while (fence
->count
< fence
->rank
) {
93 pipe_condvar_wait(fence
->signalled
, fence
->mutex
);
95 pipe_mutex_unlock(fence
->mutex
);
104 llvmpipe_init_screen_fence_funcs(struct pipe_screen
*screen
)
106 screen
->fence_reference
= llvmpipe_fence_reference
;
107 screen
->fence_signalled
= llvmpipe_fence_signalled
;
108 screen
->fence_finish
= llvmpipe_fence_finish
;