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-rw-r--r--third_party/dav1d/src/mem.c119
1 files changed, 119 insertions, 0 deletions
diff --git a/third_party/dav1d/src/mem.c b/third_party/dav1d/src/mem.c
new file mode 100644
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+++ b/third_party/dav1d/src/mem.c
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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);
+ }
+}