1 /*
2 * Copyright © 2018, VideoLAN and dav1d authors
3 * Copyright © 2018, Two Orioles, LLC
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright notice, this
10 * list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "config.h"
29
30 #include "src/ref.h"
31
default_free_callback(const uint8_t * const data,void * const user_data)32 static void default_free_callback(const uint8_t *const data, void *const user_data) {
33 assert(data == user_data);
34 dav1d_free_aligned(user_data);
35 }
36
dav1d_ref_create(const enum AllocationType type,size_t size)37 Dav1dRef *dav1d_ref_create(const enum AllocationType type, size_t size) {
38 size = (size + sizeof(void*) - 1) & ~(sizeof(void*) - 1);
39
40 uint8_t *const data = dav1d_alloc_aligned(type, size + sizeof(Dav1dRef), 64);
41 if (!data) return NULL;
42
43 Dav1dRef *const res = (Dav1dRef*)(data + size);
44 res->const_data = res->user_data = res->data = data;
45 atomic_init(&res->ref_cnt, 1);
46 res->free_ref = 0;
47 res->free_callback = default_free_callback;
48
49 return res;
50 }
51
pool_free_callback(const uint8_t * const data,void * const user_data)52 static void pool_free_callback(const uint8_t *const data, void *const user_data) {
53 dav1d_mem_pool_push((Dav1dMemPool*)data, user_data);
54 }
55
dav1d_ref_create_using_pool(Dav1dMemPool * const pool,size_t size)56 Dav1dRef *dav1d_ref_create_using_pool(Dav1dMemPool *const pool, size_t size) {
57 size = (size + sizeof(void*) - 1) & ~(sizeof(void*) - 1);
58
59 Dav1dMemPoolBuffer *const buf =
60 dav1d_mem_pool_pop(pool, size + sizeof(Dav1dRef));
61 if (!buf) return NULL;
62
63 Dav1dRef *const res = &((Dav1dRef*)buf)[-1];
64 res->data = buf->data;
65 res->const_data = pool;
66 atomic_init(&res->ref_cnt, 1);
67 res->free_ref = 0;
68 res->free_callback = pool_free_callback;
69 res->user_data = buf;
70
71 return res;
72 }
73
dav1d_ref_dec(Dav1dRef ** const pref)74 void dav1d_ref_dec(Dav1dRef **const pref) {
75 assert(pref != NULL);
76
77 Dav1dRef *const ref = *pref;
78 if (!ref) return;
79
80 *pref = NULL;
81 if (atomic_fetch_sub(&ref->ref_cnt, 1) == 1) {
82 const int free_ref = ref->free_ref;
83 ref->free_callback(ref->const_data, ref->user_data);
84 if (free_ref) dav1d_free(ref);
85 }
86 }
87