+++ /dev/null
-/*
- * SPDX-License-Identifier: LGPL-2.1-or-later
- *
- * Copyright 2011 Lai Jiangshan <laijs@cn.fujitsu.com>
- *
- * Chunk based memory management for Lock-Free RCU Hash Table
- */
-
-#include <stddef.h>
-#include "rculfhash-internal.h"
-
-static
-void lttng_ust_lfht_alloc_bucket_table(struct lttng_ust_lfht *ht, unsigned long order)
-{
- if (order == 0) {
- ht->tbl_chunk[0] = calloc(ht->min_nr_alloc_buckets,
- sizeof(struct lttng_ust_lfht_node));
- assert(ht->tbl_chunk[0]);
- } else if (order > ht->min_alloc_buckets_order) {
- unsigned long i, len = 1UL << (order - 1 - ht->min_alloc_buckets_order);
-
- for (i = len; i < 2 * len; i++) {
- ht->tbl_chunk[i] = calloc(ht->min_nr_alloc_buckets,
- sizeof(struct lttng_ust_lfht_node));
- assert(ht->tbl_chunk[i]);
- }
- }
- /* Nothing to do for 0 < order && order <= ht->min_alloc_buckets_order */
-}
-
-/*
- * lttng_ust_lfht_free_bucket_table() should be called with decreasing order.
- * When lttng_ust_lfht_free_bucket_table(0) is called, it means the whole
- * lfht is destroyed.
- */
-static
-void lttng_ust_lfht_free_bucket_table(struct lttng_ust_lfht *ht, unsigned long order)
-{
- if (order == 0)
- poison_free(ht->tbl_chunk[0]);
- else if (order > ht->min_alloc_buckets_order) {
- unsigned long i, len = 1UL << (order - 1 - ht->min_alloc_buckets_order);
-
- for (i = len; i < 2 * len; i++)
- poison_free(ht->tbl_chunk[i]);
- }
- /* Nothing to do for 0 < order && order <= ht->min_alloc_buckets_order */
-}
-
-static
-struct lttng_ust_lfht_node *bucket_at(struct lttng_ust_lfht *ht, unsigned long index)
-{
- unsigned long chunk, offset;
-
- chunk = index >> ht->min_alloc_buckets_order;
- offset = index & (ht->min_nr_alloc_buckets - 1);
- return &ht->tbl_chunk[chunk][offset];
-}
-
-static
-struct lttng_ust_lfht *alloc_lttng_ust_lfht(unsigned long min_nr_alloc_buckets,
- unsigned long max_nr_buckets)
-{
- unsigned long nr_chunks, lttng_ust_lfht_size;
-
- min_nr_alloc_buckets = max(min_nr_alloc_buckets,
- max_nr_buckets / MAX_CHUNK_TABLE);
- nr_chunks = max_nr_buckets / min_nr_alloc_buckets;
- lttng_ust_lfht_size = offsetof(struct lttng_ust_lfht, tbl_chunk) +
- sizeof(struct lttng_ust_lfht_node *) * nr_chunks;
- lttng_ust_lfht_size = max(lttng_ust_lfht_size, sizeof(struct lttng_ust_lfht));
-
- return __default_alloc_lttng_ust_lfht(
- <tng_ust_lfht_mm_chunk, lttng_ust_lfht_size,
- min_nr_alloc_buckets, max_nr_buckets);
-}
-
-const struct lttng_ust_lfht_mm_type lttng_ust_lfht_mm_chunk = {
- .alloc_lttng_ust_lfht = alloc_lttng_ust_lfht,
- .alloc_bucket_table = lttng_ust_lfht_alloc_bucket_table,
- .free_bucket_table = lttng_ust_lfht_free_bucket_table,
- .bucket_at = bucket_at,
-};