lttng-utils.h

   1 /* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) */
   2 #ifndef _LTTNG_UTILS_H
   3 #define _LTTNG_UTILS_H
   4 /*
   5  * Copyright (C) 2020 Francis Deslauriers <francis.deslauriers@efficios.com>
   6  */
   7
   8 #include <linux/jhash.h>
   9 #include <linux/string.h>
  10 #include <linux/types.h>
  11
  12 static inline
  13 struct hlist_head *utils_borrow_hash_table_bucket(
  14                 struct hlist_head *hash_table,
  15                 unsigned int hash_table_size,
  16                 const char *event_name)
  17 {
  18         size_t name_len;
  19         uint32_t hash;
  20
  21         name_len = strlen(event_name);
  22
  23         hash = jhash(event_name, name_len, 0);
  24         return &hash_table[hash & (hash_table_size - 1)];
  25 }
  26 #endif /* _LTTNG_UTILS_H */