2 * Copyright 2007 Nouveau Project
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
26 #include "nouveau_heap.h"
29 nouveau_heap_init(struct nouveau_heap
**heap
,
30 unsigned start
, unsigned size
)
32 struct nouveau_heap
*r
;
34 r
= calloc(1, sizeof(struct nouveau_heap
));
45 nouveau_heap_destroy(struct nouveau_heap
**heap
)
54 nouveau_heap_alloc(struct nouveau_heap
*heap
, unsigned size
, void *priv
,
55 struct nouveau_heap
**res
)
57 struct nouveau_heap
*r
;
59 if (!heap
|| !size
|| !res
|| *res
)
63 if (!heap
->in_use
&& heap
->size
>= size
) {
64 r
= calloc(1, sizeof(struct nouveau_heap
));
68 r
->start
= (heap
->start
+ heap
->size
) - size
;
92 nouveau_heap_free(struct nouveau_heap
**res
)
94 struct nouveau_heap
*r
;
103 if (r
->next
&& !r
->next
->in_use
) {
104 struct nouveau_heap
*new = r
->next
;
109 new->size
+= r
->size
;
110 new->start
= r
->start
;
116 if (r
->prev
&& !r
->prev
->in_use
) {
117 r
->prev
->next
= r
->next
;
119 r
->next
->prev
= r
->prev
;
120 r
->prev
->size
+= r
->size
;