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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119// 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 idx, pid_t pid){ map->map[idx].pid = pid;}
char *perf_thread_map__comm(struct perf_thread_map *map, int idx){ return map->map[idx].comm;}
struct perf_thread_map *perf_thread_map__new_array(int nr_threads, pid_t *array){ struct perf_thread_map *threads = thread_map__alloc(nr_threads); int i;
if (!threads) return NULL;
for (i = 0; i < nr_threads; i++) perf_thread_map__set_pid(threads, i, array ? array[i] : -1);
threads->nr = nr_threads; refcount_set(&threads->refcnt, 1);
return threads;}
struct perf_thread_map *perf_thread_map__new_dummy(void){ return perf_thread_map__new_array(1, NULL);}
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 idx){ if (!map) { assert(idx == 0); return -1; }
return map->map[idx].pid;}
int perf_thread_map__idx(struct perf_thread_map *threads, pid_t pid){ if (!threads) return pid == -1 ? 0 : -1;
for (int i = 0; i < threads->nr; ++i) { if (threads->map[i].pid == pid) return i; } return -1;}