#include <dirent.h>#include <stdlib.h>#include <stdio.h>#include "thread_map.h" /* Skip "." and ".." directories */static int filter(const struct dirent *dir){	if (dir->d_name[0] == '.')		return 0;	else		return 1;} struct thread_map *thread_map__new_by_pid(pid_t pid){	struct thread_map *threads;	char name[256];	int items;	struct dirent **namelist = NULL;	int i; 	sprintf(name, "/proc/%d/task", pid);	items = scandir(name, &namelist, filter, NULL);	if (items <= 0)                return NULL; 	threads = malloc(sizeof(*threads) + sizeof(pid_t) * items);	if (threads != NULL) {		for (i = 0; i < items; i++)			threads->map[i] = atoi(namelist[i]->d_name);		threads->nr = items;	} 	for (i=0; i<items; i++)		free(namelist[i]);	free(namelist); 	return threads;} struct thread_map *thread_map__new_by_tid(pid_t tid){	struct thread_map *threads = malloc(sizeof(*threads) + sizeof(pid_t)); 	if (threads != NULL) {		threads->map[0] = tid;		threads->nr	= 1;	} 	return threads;} struct thread_map *thread_map__new(pid_t pid, pid_t tid){	if (pid != -1)		return thread_map__new_by_pid(pid);	return thread_map__new_by_tid(tid);} void thread_map__delete(struct thread_map *threads){	free(threads);}