// SPDX-License-Identifier: GPL-2.0#include <perf/threadmap.h>#include <stdlib.h>#include <linux/refcount.h>#include <internal/threadmap.h>#include <string.h>#include <asm/bug.h>#include <stdio.h> static void perf_thread_map__reset(struct perf_thread_map *map, int start, int nr){	size_t size = (nr - start) * sizeof(map->map[0]); 	memset(&map->map[start], 0, size);	map->err_thread = -1;} struct perf_thread_map *perf_thread_map__realloc(struct perf_thread_map *map, int nr){	size_t size = sizeof(*map) + sizeof(map->map[0]) * nr;	int start = map ? map->nr : 0; 	map = realloc(map, size);	/*	 * We only realloc to add more items, let's reset new items.	 */	if (map)		perf_thread_map__reset(map, start, nr); 	return map;} #define thread_map__alloc(__nr) perf_thread_map__realloc(NULL, __nr) void perf_thread_map__set_pid(struct perf_thread_map *map, int thread, pid_t pid){	map->map[thread].pid = pid;} char *perf_thread_map__comm(struct perf_thread_map *map, int thread){	return map->map[thread].comm;} struct perf_thread_map *perf_thread_map__new_dummy(void){	struct perf_thread_map *threads = thread_map__alloc(1); 	if (threads != NULL) {		perf_thread_map__set_pid(threads, 0, -1);		threads->nr = 1;		refcount_set(&threads->refcnt, 1);	}	return threads;} static void perf_thread_map__delete(struct perf_thread_map *threads){	if (threads) {		int i; 		WARN_ONCE(refcount_read(&threads->refcnt) != 0,			  "thread map refcnt unbalanced\n");		for (i = 0; i < threads->nr; i++)			free(perf_thread_map__comm(threads, i));		free(threads);	}} struct perf_thread_map *perf_thread_map__get(struct perf_thread_map *map){	if (map)		refcount_inc(&map->refcnt);	return map;} void perf_thread_map__put(struct perf_thread_map *map){	if (map && refcount_dec_and_test(&map->refcnt))		perf_thread_map__delete(map);} int perf_thread_map__nr(struct perf_thread_map *threads){	return threads ? threads->nr : 1;} pid_t perf_thread_map__pid(struct perf_thread_map *map, int thread){	return map->map[thread].pid;}