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>
40 #include "linked_list.h"
42 #include "p_compiler.h"
47 #include "pb_buffer.h"
48 #include "pb_buffer_fenced.h"
56 * Convenience macro (type safe).
58 #define SUPER(__derived) (&(__derived)->base)
61 struct fenced_buffer_list
63 _glthread_Mutex mutex
;
65 struct pipe_winsys
*winsys
;
70 struct list_head delayed
;
75 * Wrapper around a pipe buffer which adds fencing and reference counting.
79 struct pb_buffer base
;
81 struct pb_buffer
*buffer
;
83 struct pipe_fence_handle
*fence
;
85 struct list_head head
;
86 struct fenced_buffer_list
*list
;
90 static INLINE
struct fenced_buffer
*
91 fenced_buffer(struct pb_buffer
*buf
)
94 assert(buf
->vtbl
== &fenced_buffer_vtbl
);
95 return (struct fenced_buffer
*)buf
;
102 _fenced_buffer_list_check_free(struct fenced_buffer_list
*fenced_list
,
105 struct pipe_winsys
*winsys
= fenced_list
->winsys
;
106 struct fenced_buffer
*fenced_buf
;
107 struct list_head
*list
, *prev
;
110 list
= fenced_list
->delayed
.next
;
112 if (fenced_list
->numDelayed
> 3) {
115 for (i
= 0; i
< fenced_list
->numDelayed
; i
+= 3) {
121 for (; list
!= &fenced_list
->delayed
; list
= prev
, prev
= list
->prev
) {
123 fenced_buf
= LIST_ENTRY(struct fenced_buffer
, list
, head
);
127 signaled
= winsys
->fence_finish(winsys
, fenced_buf
->fence
, 0);
130 signaled
= winsys
->fence_signalled(winsys
, fenced_buf
->fence
, 0);
135 /* XXX: we are assuming that buffers are freed in the same order they
136 * are fenced which may not always be true...
140 winsys
->fence_reference(winsys
, &fenced_buf
->fence
, NULL
);
143 fenced_list
->numDelayed
--;
145 /* Do the delayed destroy:
147 pb_reference(&fenced_buf
->buffer
, NULL
);
154 fenced_buffer_destroy(struct pb_buffer
*buf
)
156 struct fenced_buffer
*fenced_buf
= fenced_buffer(buf
);
157 struct fenced_buffer_list
*fenced_list
= fenced_buf
->list
;
159 if (fenced_buf
->fence
) {
160 LIST_ADDTAIL(&fenced_buf
->head
, &fenced_list
->delayed
);
161 fenced_list
->numDelayed
++;
164 pb_reference(&fenced_buf
->buffer
, NULL
);
168 if ((fenced_list
->numDelayed
% fenced_list
->checkDelayed
) == 0)
169 _fenced_buffer_list_check_free(fenced_list
, 0);
174 fenced_buffer_map(struct pb_buffer
*buf
,
177 struct fenced_buffer
*fenced_buf
= fenced_buffer(buf
);
178 return pb_map(fenced_buf
->buffer
, flags
);
183 fenced_buffer_unmap(struct pb_buffer
*buf
)
185 struct fenced_buffer
*fenced_buf
= fenced_buffer(buf
);
186 pb_unmap(fenced_buf
->buffer
);
191 fenced_buffer_get_base_buffer(struct pb_buffer
*buf
,
192 struct pb_buffer
**base_buf
,
195 struct fenced_buffer
*fenced_buf
= fenced_buffer(buf
);
196 pb_get_base_buffer(fenced_buf
->buffer
, base_buf
, offset
);
201 fenced_buffer_vtbl
= {
202 fenced_buffer_destroy
,
205 fenced_buffer_get_base_buffer
210 fenced_buffer_create(struct fenced_buffer_list
*fenced_list
,
211 struct pb_buffer
*buffer
)
213 struct fenced_buffer
*buf
;
218 buf
= CALLOC_STRUCT(fenced_buffer
);
222 buf
->base
.base
.refcount
= 1;
223 buf
->base
.base
.alignment
= buffer
->base
.alignment
;
224 buf
->base
.base
.usage
= buffer
->base
.usage
;
225 buf
->base
.base
.size
= buffer
->base
.size
;
227 buf
->base
.vtbl
= &fenced_buffer_vtbl
;
228 buf
->buffer
= buffer
;
229 buf
->list
= fenced_list
;
236 buffer_fence(struct pb_buffer
*buf
,
237 struct pipe_fence_handle
*fence
)
239 struct fenced_buffer
*fenced_buf
= fenced_buffer(buf
);
240 struct fenced_buffer_list
*fenced_list
= fenced_buf
->list
;
241 struct pipe_winsys
*winsys
= fenced_list
->winsys
;
243 _glthread_LOCK_MUTEX(fenced_list
->mutex
);
244 winsys
->fence_reference(winsys
, &fenced_buf
->fence
, fence
);
245 _glthread_UNLOCK_MUTEX(fenced_list
->mutex
);
249 struct fenced_buffer_list
*
250 fenced_buffer_list_create(struct pipe_winsys
*winsys
)
252 struct fenced_buffer_list
*fenced_list
;
254 fenced_list
= (struct fenced_buffer_list
*)CALLOC(1, sizeof(*fenced_list
));
258 fenced_list
->winsys
= winsys
;
260 LIST_INITHEAD(&fenced_list
->delayed
);
262 fenced_list
->numDelayed
= 0;
264 /* TODO: don't hard code this */
265 fenced_list
->checkDelayed
= 5;
267 _glthread_INIT_MUTEX(fenced_list
->mutex
);
274 fenced_buffer_list_check_free(struct fenced_buffer_list
*fenced_list
,
277 _glthread_LOCK_MUTEX(fenced_list
->mutex
);
278 _fenced_buffer_list_check_free(fenced_list
, wait
);
279 _glthread_UNLOCK_MUTEX(fenced_list
->mutex
);
284 fenced_buffer_list_destroy(struct fenced_buffer_list
*fenced_list
)
286 _glthread_LOCK_MUTEX(fenced_list
->mutex
);
288 /* Wait on outstanding fences */
289 while (fenced_list
->numDelayed
) {
290 _glthread_UNLOCK_MUTEX(fenced_list
->mutex
);
292 _fenced_buffer_list_check_free(fenced_list
, 1);
293 _glthread_LOCK_MUTEX(fenced_list
->mutex
);
296 _glthread_UNLOCK_MUTEX(fenced_list
->mutex
);