| 1 | /* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) */ |
| 2 | #ifndef _LTTNG_UTILS_H |
| 3 | #define _LTTNG_UTILS_H |
| 4 | |
| 5 | /* |
| 6 | * Copyright (C) 2020 Francis Deslauriers <francis.deslauriers@efficios.com> |
| 7 | */ |
| 8 | |
| 9 | #include <linux/jhash.h> |
| 10 | #include <linux/string.h> |
| 11 | #include <linux/types.h> |
| 12 | |
| 13 | static inline |
| 14 | struct hlist_head *utils_borrow_hash_table_bucket( |
| 15 | struct hlist_head *hash_table, |
| 16 | unsigned int hash_table_size, |
| 17 | const char *event_name) |
| 18 | { |
| 19 | size_t name_len; |
| 20 | uint32_t hash; |
| 21 | |
| 22 | name_len = strlen(event_name); |
| 23 | |
| 24 | hash = jhash(event_name, name_len, 0); |
| 25 | return &hash_table[hash & (hash_table_size - 1)]; |
| 26 | } |
| 27 | #endif /* _LTTNG_UTILS_H */ |