1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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 TUNGSTEN GRAPHICS 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 **************************************************************************/
30 * Implementation of fenced buffers.
32 * \author José Fonseca <jrfonseca-at-tungstengraphics-dot-com>
33 * \author Thomas Hellström <thomas-at-tungstengraphics-dot-com>
37 #include "linked_list.h"
39 #include "p_compiler.h"
45 #include "pb_buffer.h"
46 #include "pb_buffer_fenced.h"
54 * Convenience macro (type safe).
56 #define SUPER(__derived) (&(__derived)->base)
59 struct fenced_buffer_list
61 _glthread_Mutex mutex
;
63 struct pipe_winsys
*winsys
;
68 struct list_head delayed
;
73 * Wrapper around a pipe buffer which adds fencing and reference counting.
77 struct pb_buffer base
;
79 struct pb_buffer
*buffer
;
81 struct pipe_fence_handle
*fence
;
83 struct list_head head
;
84 struct fenced_buffer_list
*list
;
88 static INLINE
struct fenced_buffer
*
89 fenced_buffer(struct pb_buffer
*buf
)
92 assert(buf
->vtbl
== &fenced_buffer_vtbl
);
93 return (struct fenced_buffer
*)buf
;
100 _fenced_buffer_list_check_free(struct fenced_buffer_list
*fenced_list
,
103 struct pipe_winsys
*winsys
= fenced_list
->winsys
;
104 struct fenced_buffer
*fenced_buf
;
105 struct list_head
*list
, *prev
;
108 list
= fenced_list
->delayed
.next
;
110 if (fenced_list
->numDelayed
> 3) {
113 for (i
= 0; i
< fenced_list
->numDelayed
; i
+= 3) {
119 for (; list
!= &fenced_list
->delayed
; list
= prev
, prev
= list
->prev
) {
121 fenced_buf
= LIST_ENTRY(struct fenced_buffer
, list
, head
);
125 signaled
= winsys
->fence_finish(winsys
, fenced_buf
->fence
, 0);
128 signaled
= winsys
->fence_signalled(winsys
, fenced_buf
->fence
, 0);
133 /* XXX: we are assuming that buffers are freed in the same order they
134 * are fenced which may not always be true...
138 winsys
->fence_reference(winsys
, &fenced_buf
->fence
, NULL
);
141 fenced_list
->numDelayed
--;
143 /* Do the delayed destroy:
145 pb_reference(&fenced_buf
->buffer
, NULL
);
152 fenced_buffer_destroy(struct pb_buffer
*buf
)
154 struct fenced_buffer
*fenced_buf
= fenced_buffer(buf
);
155 struct fenced_buffer_list
*fenced_list
= fenced_buf
->list
;
157 if (fenced_buf
->fence
) {
158 LIST_ADDTAIL(&fenced_buf
->head
, &fenced_list
->delayed
);
159 fenced_list
->numDelayed
++;
162 pb_reference(&fenced_buf
->buffer
, NULL
);
166 if ((fenced_list
->numDelayed
% fenced_list
->checkDelayed
) == 0)
167 _fenced_buffer_list_check_free(fenced_list
, 0);
172 fenced_buffer_map(struct pb_buffer
*buf
,
175 struct fenced_buffer
*fenced_buf
= fenced_buffer(buf
);
176 return pb_map(fenced_buf
->buffer
, flags
);
181 fenced_buffer_unmap(struct pb_buffer
*buf
)
183 struct fenced_buffer
*fenced_buf
= fenced_buffer(buf
);
184 pb_unmap(fenced_buf
->buffer
);
189 fenced_buffer_get_base_buffer(struct pb_buffer
*buf
,
190 struct pb_buffer
**base_buf
,
193 struct fenced_buffer
*fenced_buf
= fenced_buffer(buf
);
194 pb_get_base_buffer(fenced_buf
->buffer
, base_buf
, offset
);
199 fenced_buffer_vtbl
= {
200 fenced_buffer_destroy
,
203 fenced_buffer_get_base_buffer
208 fenced_buffer_create(struct fenced_buffer_list
*fenced_list
,
209 struct pb_buffer
*buffer
)
211 struct fenced_buffer
*buf
;
216 buf
= CALLOC_STRUCT(fenced_buffer
);
220 buf
->base
.base
.refcount
= 1;
221 buf
->base
.base
.alignment
= buffer
->base
.alignment
;
222 buf
->base
.base
.usage
= buffer
->base
.usage
;
223 buf
->base
.base
.size
= buffer
->base
.size
;
225 buf
->base
.vtbl
= &fenced_buffer_vtbl
;
226 buf
->buffer
= buffer
;
227 buf
->list
= fenced_list
;
234 buffer_fence(struct pb_buffer
*buf
,
235 struct pipe_fence_handle
*fence
)
237 struct fenced_buffer
*fenced_buf
= fenced_buffer(buf
);
238 struct fenced_buffer_list
*fenced_list
= fenced_buf
->list
;
239 struct pipe_winsys
*winsys
= fenced_list
->winsys
;
241 _glthread_LOCK_MUTEX(fenced_list
->mutex
);
242 winsys
->fence_reference(winsys
, &fenced_buf
->fence
, fence
);
243 _glthread_UNLOCK_MUTEX(fenced_list
->mutex
);
247 struct fenced_buffer_list
*
248 fenced_buffer_list_create(struct pipe_winsys
*winsys
)
250 struct fenced_buffer_list
*fenced_list
;
252 fenced_list
= (struct fenced_buffer_list
*)CALLOC(1, sizeof(*fenced_list
));
256 fenced_list
->winsys
= winsys
;
258 LIST_INITHEAD(&fenced_list
->delayed
);
260 fenced_list
->numDelayed
= 0;
262 /* TODO: don't hard code this */
263 fenced_list
->checkDelayed
= 5;
265 _glthread_INIT_MUTEX(fenced_list
->mutex
);
272 fenced_buffer_list_check_free(struct fenced_buffer_list
*fenced_list
,
275 _glthread_LOCK_MUTEX(fenced_list
->mutex
);
276 _fenced_buffer_list_check_free(fenced_list
, wait
);
277 _glthread_UNLOCK_MUTEX(fenced_list
->mutex
);
282 fenced_buffer_list_destroy(struct fenced_buffer_list
*fenced_list
)
284 _glthread_LOCK_MUTEX(fenced_list
->mutex
);
286 /* Wait on outstanding fences */
287 while (fenced_list
->numDelayed
) {
288 _glthread_UNLOCK_MUTEX(fenced_list
->mutex
);
290 _fenced_buffer_list_check_free(fenced_list
, 1);
291 _glthread_LOCK_MUTEX(fenced_list
->mutex
);
294 _glthread_UNLOCK_MUTEX(fenced_list
->mutex
);