Function sys_sched_setparam

components/lwp/lwp_syscall.c:8765–8800

* @brief Set scheduling parameters for a specific thread. * * This function allows setting the scheduling parameters for a thread identified by its thread ID (`tid`). * The parameters are provided via the `param` argument, which should be a structure compatible with the * system's scheduling policies. * * @param[in] tid The thread ID of the target thread for which the scheduling parameters a

 *       The exact structure and fields of `param` depend on the system's implementation and scheduling policies.
 */
sysret_t sys_sched_setparam(pid_t tid, void *param)
{
    struct sched_param *sched_param = RT_NULL;
    rt_thread_t thread;
    int ret = -1;

    if (!lwp_user_accessable(param, sizeof(struct sched_param)))
    {
        return -EFAULT;
    }

    sched_param = kmem_get(sizeof(struct sched_param));
    if (sched_param == RT_NULL)
    {
        return -ENOMEM;
    }

    if (lwp_get_from_user(sched_param, param, sizeof(struct sched_param)) != sizeof(struct sched_param))
    {
        kmem_put(sched_param);
        return -EINVAL;
    }

    thread = lwp_tid_get_thread_and_inc_ref(tid);

    if (thread)
    {
        ret = rt_thread_control(thread, RT_THREAD_CTRL_RESET_PRIORITY, (void *)&sched_param->sched_priority);
    }

    lwp_tid_dec_ref(thread);

    kmem_put(sched_param);

    return ret;
}

/**
 * @brief Relinquish the processor voluntarily.