1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
/*
* Copyright © 2018, VideoLAN and dav1d authors
* Copyright © 2018, Two Orioles, LLC
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "src/ref.h"
static void default_free_callback(const uint8_t *const data, void *const user_data) {
assert(data == user_data);
dav1d_free_aligned(user_data);
}
Dav1dRef *dav1d_ref_create(size_t size) {
size = (size + sizeof(void*) - 1) & ~(sizeof(void*) - 1);
uint8_t *const data = dav1d_alloc_aligned(size + sizeof(Dav1dRef), 64);
if (!data) return NULL;
Dav1dRef *const res = (Dav1dRef*)(data + size);
res->const_data = res->user_data = res->data = data;
atomic_init(&res->ref_cnt, 1);
res->free_ref = 0;
res->free_callback = default_free_callback;
return res;
}
static void pool_free_callback(const uint8_t *const data, void *const user_data) {
dav1d_mem_pool_push((Dav1dMemPool*)data, user_data);
}
Dav1dRef *dav1d_ref_create_using_pool(Dav1dMemPool *const pool, size_t size) {
size = (size + sizeof(void*) - 1) & ~(sizeof(void*) - 1);
Dav1dMemPoolBuffer *const buf =
dav1d_mem_pool_pop(pool, size + sizeof(Dav1dRef));
if (!buf) return NULL;
Dav1dRef *const res = &((Dav1dRef*)buf)[-1];
res->data = buf->data;
res->const_data = pool;
atomic_init(&res->ref_cnt, 1);
res->free_ref = 0;
res->free_callback = pool_free_callback;
res->user_data = buf;
return res;
}
Dav1dRef *dav1d_ref_wrap(const uint8_t *const ptr,
void (*free_callback)(const uint8_t *data, void *user_data),
void *const user_data)
{
Dav1dRef *res = malloc(sizeof(Dav1dRef));
if (!res) return NULL;
res->data = NULL;
res->const_data = ptr;
atomic_init(&res->ref_cnt, 1);
res->free_ref = 1;
res->free_callback = free_callback;
res->user_data = user_data;
return res;
}
void dav1d_ref_dec(Dav1dRef **const pref) {
assert(pref != NULL);
Dav1dRef *const ref = *pref;
if (!ref) return;
*pref = NULL;
if (atomic_fetch_sub(&ref->ref_cnt, 1) == 1) {
const int free_ref = ref->free_ref;
ref->free_callback(ref->const_data, ref->user_data);
if (free_ref) free(ref);
}
}
int dav1d_ref_is_writable(Dav1dRef *const ref) {
return atomic_load(&ref->ref_cnt) == 1 && ref->data;
}
|
