/* * 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);    }}