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
index 0000000000..558bc01cae
--- /dev/null
+++ b/third_party/dav1d/src/mem.c
@@ -0,0 +1,119 @@
+/*
+ * 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);
+    }
+}