Function sys_rt_timer_create

components/lwp/lwp_syscall.c:2860–2897

* @brief Creates a timer. * * This system call creates a timer that can be used to trigger events or * actions after a specified timeout or interval. The timer will operate in a * real-time manner and can be configured to trigger once or repeatedly. The * created timer can be started, stopped, or deleted as required. * * @param[in] name The name of the timer. It should be a unique string

 *          undesired behavior, especially if the timer is periodic.
 */
rt_timer_t sys_rt_timer_create(const char *name,
                               void *data,
                               rt_tick_t time,
                               rt_uint8_t flag)
{
    int len = 0;
    char *kname = RT_NULL;
    rt_timer_t timer = RT_NULL;

    len = lwp_user_strlen(name);
    if (len <= 0)
    {
        return RT_NULL;
    }

    kname = (char *)kmem_get(len + 1);
    if (!kname)
    {
        return RT_NULL;
    }

    if (lwp_get_from_user(kname, (void *)name, len + 1) != (len + 1))
    {
        kmem_put(kname);
        return RT_NULL;
    }

    timer = rt_timer_create(kname, timer_timeout_callback, (void *)data, time, flag);
    if (lwp_user_object_add(lwp_self(), (rt_object_t)timer) != 0)
    {
        rt_timer_delete(timer);
        timer = NULL;
    }

    kmem_put(kname);

    return timer;
}

/**
 * @brief Deletes a timer.