+/*
+ * Simple example of custom mempool structure. Holds pointers to all the
+ * elements which are simply malloc'd in this example.
+ */
+struct custom_mempool {
+ rte_spinlock_t lock;
+ unsigned count;
+ unsigned size;
+ void *elts[];
+};
+
+/*
+ * Loop through all the element pointers and allocate a chunk of memory, then
+ * insert that memory into the ring.
+ */
+static int
+custom_mempool_alloc(struct rte_mempool *mp)
+{
+ struct custom_mempool *cm;
+
+ cm = rte_zmalloc("custom_mempool",
+ sizeof(struct custom_mempool) + mp->size * sizeof(void *), 0);
+ if (cm == NULL)
+ return -ENOMEM;
+
+ rte_spinlock_init(&cm->lock);
+ cm->count = 0;
+ cm->size = mp->size;
+ mp->pool_data = cm;
+ return 0;
+}
+
+static void
+custom_mempool_free(struct rte_mempool *mp)
+{
+ rte_free((void *)(mp->pool_data));
+}
+
+static int
+custom_mempool_enqueue(struct rte_mempool *mp, void * const *obj_table,
+ unsigned n)
+{
+ struct custom_mempool *cm = (struct custom_mempool *)(mp->pool_data);
+ int ret = 0;
+
+ rte_spinlock_lock(&cm->lock);
+ if (cm->count + n > cm->size) {
+ ret = -ENOBUFS;
+ } else {
+ memcpy(&cm->elts[cm->count], obj_table, sizeof(void *) * n);
+ cm->count += n;
+ }
+ rte_spinlock_unlock(&cm->lock);
+ return ret;
+}
+
+
+static int
+custom_mempool_dequeue(struct rte_mempool *mp, void **obj_table, unsigned n)
+{
+ struct custom_mempool *cm = (struct custom_mempool *)(mp->pool_data);
+ int ret = 0;
+
+ rte_spinlock_lock(&cm->lock);
+ if (n > cm->count) {
+ ret = -ENOENT;
+ } else {
+ cm->count -= n;
+ memcpy(obj_table, &cm->elts[cm->count], sizeof(void *) * n);
+ }
+ rte_spinlock_unlock(&cm->lock);
+ return ret;
+}
+
+static unsigned
+custom_mempool_get_count(const struct rte_mempool *mp)
+{
+ struct custom_mempool *cm = (struct custom_mempool *)(mp->pool_data);
+
+ return cm->count;
+}
+
+static struct rte_mempool_ops mempool_ops_custom = {
+ .name = "custom_handler",
+ .alloc = custom_mempool_alloc,
+ .free = custom_mempool_free,
+ .enqueue = custom_mempool_enqueue,
+ .dequeue = custom_mempool_dequeue,
+ .get_count = custom_mempool_get_count,
+};
+
+MEMPOOL_REGISTER_OPS(mempool_ops_custom);
+