Function list_process

components/lwp/lwp_pid.c:1757–1834

* @brief Lists all processes and threads in the system * * @return long Returns 0 on success * * @note This function: * - Prints a header with process/thread information columns * - Lists all kernel threads (without LWP association) * - Lists all user processes (LWPs) with their threads * - For each thread, displays: * - PID/TID (process/thread IDs) *

 *         - Thread name/command
 */
long list_process(void)
{
    int index;
    int maxlen;
    rt_ubase_t level;
    struct rt_thread *thread;
    struct rt_list_node *node, *list;
    const char *item_title = "thread";

    int count = 0;
    struct rt_thread **threads;

    maxlen = RT_NAME_MAX;
#ifdef RT_USING_SMP
    rt_kprintf("%-*.s %-*.s %-*.s cpu pri  status      sp     stack size max used left tick  error %-*.s\n", 4, "PID", 4, "TID", maxlen, item_title, maxlen, "cmd");
    object_split(4);rt_kprintf(" ");object_split(4);rt_kprintf(" ");object_split(maxlen);rt_kprintf(" ");
    rt_kprintf(                  "--- ---  ------- ---------- ---------- -------- ---------- -----");rt_kprintf(" ");object_split(maxlen);rt_kprintf("\n");
#else
    rt_kprintf("%-*.s %-*.s %-*.s pri  status      sp     stack size max used left tick  error\n", 4, "PID", 4, "TID", maxlen, item_title, maxlen, "cmd");
    object_split(4);rt_kprintf(" ");object_split(4);rt_kprintf(" ");object_split(maxlen);rt_kprintf(" ");
    rt_kprintf(                  "---  ------- ---------- ---------- -------- ---------- -----");rt_kprintf(" ");object_split(maxlen);rt_kprintf("\n");
#endif /*RT_USING_SMP*/

    count = rt_object_get_length(RT_Object_Class_Thread);
    if (count > 0)
    {
        /* get thread pointers */
        threads = (struct rt_thread **)rt_calloc(count, sizeof(struct rt_thread *));
        if (threads)
        {
            index = rt_object_get_pointers(RT_Object_Class_Thread, (rt_object_t *)threads, count);

            if (index > 0)
            {
                for (index = 0; index <count; index++)
                {
                    struct rt_thread th;

                    thread = threads[index];

                    level = rt_spin_lock_irqsave(&thread->spinlock);
                    if ((rt_object_get_type(&thread->parent) & ~RT_Object_Class_Static) != RT_Object_Class_Thread)
                    {
                        rt_spin_unlock_irqrestore(&thread->spinlock, level);
                        continue;
                    }

                    rt_memcpy(&th, thread, sizeof(struct rt_thread));
                    rt_spin_unlock_irqrestore(&thread->spinlock, level);

                    if (th.lwp == RT_NULL)
                    {
                        rt_kprintf("          %-*.*s ", maxlen, RT_NAME_MAX, "kernel");
                        print_thread_info(&th, maxlen);
                    }
                }
            }
            rt_free(threads);