1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __PERF_THREADS_H
3#define __PERF_THREADS_H
4
5#include "hashmap.h"
6#include "rwsem.h"
7
8struct thread;
9
10#define THREADS__TABLE_BITS	3
11#define THREADS__TABLE_SIZE	(1 << THREADS__TABLE_BITS)
12
13struct threads_table_entry {
14	/* Key is tid, value is struct thread. */
15	struct hashmap	       shard;
16	struct rw_semaphore    lock;
17	struct thread	       *last_match;
18};
19
20struct threads {
21	struct threads_table_entry table[THREADS__TABLE_SIZE];
22};
23
24void threads__init(struct threads *threads);
25void threads__exit(struct threads *threads);
26size_t threads__nr(struct threads *threads);
27struct thread *threads__find(struct threads *threads, pid_t tid);
28struct thread *threads__findnew(struct threads *threads, pid_t pid, pid_t tid, bool *created);
29void threads__remove_all_threads(struct threads *threads);
30void threads__remove(struct threads *threads, struct thread *thread);
31int threads__for_each_thread(struct threads *threads,
32			     int (*fn)(struct thread *thread, void *data),
33			     void *data);
34
35#endif	/* __PERF_THREADS_H */
36