#pragma once

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dirent.h>
#include <ctype.h>
#include <unistd.h>
#include <string.h>
#include "../data_structure/list_entry.h"

#define THREAD_MON_PROC_DIR "/proc"
#define MAX_PROC 32768
#define MAX_NAME 256
#define MAX_ARRAY 65536

typedef struct _process_list {
    LIST_ENTRY entry;
    int pid;
} process_list, *pprocess_list;

/**
 * Get all child processes of the given PID.
 * Returns a flat linked list (pprocess_list).
 * The head node's pid is -1, used only as the list entry.
 * Memory allocated for nodes must be freed using FreeProcessOrThreadList().
 */
pprocess_list GetProcessListByPID(int pid);

/**
 * Get all threads (tasks) of the given PID.
 * Returns a flat linked list.
 * The head node's pid is -1, used only as the list entry.
 * Memory allocated for nodes must be freed using FreeProcessOrThreadList().
 */
pprocess_list GetThreadListByPID(int pid);

/**
 * Get all threads and child processes of the given PID recursively.
 * Returns a flat linked list.
 * The head node's pid is -1, used only as the list entry.
 * Memory allocated for nodes must be freed using FreeProcessOrThreadList().
 */
pprocess_list GetAllProcessAndThreadByPID(int pid);

/**
 * Free the linked list returned by the above functions, including all nodes.
 */
void FreeProcessOrThreadList(pprocess_list list);