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/*
* Copyright © 2020, VideoLAN and dav1d authors
* Copyright © 2020, 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 <stdint.h>
#include "src/internal.h"
static COLD void mem_pool_destroy(Dav1dMemPool *const pool) {
pthread_mutex_destroy(&pool->lock);
free(pool);
}
void dav1d_mem_pool_push(Dav1dMemPool *const pool, Dav1dMemPoolBuffer *const buf) {
pthread_mutex_lock(&pool->lock);
const int ref_cnt = --pool->ref_cnt;
if (!pool->end) {
buf->next = pool->buf;
pool->buf = buf;
pthread_mutex_unlock(&pool->lock);
assert(ref_cnt > 0);
} else {
pthread_mutex_unlock(&pool->lock);
dav1d_free_aligned(buf->data);
if (!ref_cnt) mem_pool_destroy(pool);
}
}
Dav1dMemPoolBuffer *dav1d_mem_pool_pop(Dav1dMemPool *const pool, const size_t size) {
assert(!(size & (sizeof(void*) - 1)));
pthread_mutex_lock(&pool->lock);
Dav1dMemPoolBuffer *buf = pool->buf;
pool->ref_cnt++;
uint8_t *data;
if (buf) {
pool->buf = buf->next;
pthread_mutex_unlock(&pool->lock);
data = buf->data;
if ((uintptr_t)buf - (uintptr_t)data != size) {
/* Reallocate if the size has changed */
dav1d_free_aligned(data);
goto alloc;
}
} else {
pthread_mutex_unlock(&pool->lock);
alloc:
data = dav1d_alloc_aligned(size + sizeof(Dav1dMemPoolBuffer), 64);
if (!data) {
pthread_mutex_lock(&pool->lock);
const int ref_cnt = --pool->ref_cnt;
pthread_mutex_unlock(&pool->lock);
if (!ref_cnt) mem_pool_destroy(pool);
return NULL;
}
buf = (Dav1dMemPoolBuffer*)(data + size);
buf->data = data;
}
return buf;
}
COLD int dav1d_mem_pool_init(Dav1dMemPool **const ppool) {
Dav1dMemPool *const pool = malloc(sizeof(Dav1dMemPool));
if (pool) {
if (!pthread_mutex_init(&pool->lock, NULL)) {
pool->buf = NULL;
pool->ref_cnt = 1;
pool->end = 0;
*ppool = pool;
return 0;
}
free(pool);
}
*ppool = NULL;
return DAV1D_ERR(ENOMEM);
}
COLD void dav1d_mem_pool_end(Dav1dMemPool *const pool) {
if (pool) {
pthread_mutex_lock(&pool->lock);
Dav1dMemPoolBuffer *buf = pool->buf;
const int ref_cnt = --pool->ref_cnt;
pool->buf = NULL;
pool->end = 1;
pthread_mutex_unlock(&pool->lock);
while (buf) {
void *const data = buf->data;
buf = buf->next;
dav1d_free_aligned(data);
}
if (!ref_cnt) mem_pool_destroy(pool);
}
}
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