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/*
* 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(const enum AllocationType type, size_t size) {
size = (size + sizeof(void*) - 1) & ~(sizeof(void*) - 1);
uint8_t *const data = dav1d_alloc_aligned(type, 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;
}
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) dav1d_free(ref);
}
}