tools/perf/util/threads.h

   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
   8 struct thread;
   9
  10 #define THREADS__TABLE_BITS     3
  11 #define THREADS__TABLE_SIZE     (1 << THREADS__TABLE_BITS)
  12
  13 struct 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
  20 struct threads {
  21         struct threads_table_entry table[THREADS__TABLE_SIZE];
  22 };
  23
  24 void threads__init(struct threads *threads);
  25 void threads__exit(struct threads *threads);
  26 size_t threads__nr(struct threads *threads);
  27 struct thread *threads__find(struct threads *threads, pid_t tid);
  28 struct thread *threads__findnew(struct threads *threads, pid_t pid, pid_t tid, bool *created);
  29 void threads__remove_all_threads(struct threads *threads);
  30 void threads__remove(struct threads *threads, struct thread *thread);
  31 int threads__for_each_thread(struct threads *threads,
  32                              int (*fn)(struct thread *thread, void *data),
  33                              void *data);
  34
  35 #endif  /* __PERF_THREADS_H */