Function sys_event_create

components/lwp/lwp_syscall.c:2134–2168

* @brief Creates an event object for inter-thread or inter-process communication. * * @param name A string representing the name of the event. If `NULL`, the event will * be created without a name. Named events can be identified and accessed * globally if supported by the system. * @param flag Specifies the behavior of the event. Possible values include: *

 * @see sys_event_delete(), sys_event_send(), sys_event_recv()
 */
rt_event_t sys_event_create(const char *name, rt_uint8_t flag)
{
    int len = 0;
    rt_event_t event = RT_NULL;
    char *kname = 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;
    }

    event = rt_event_create(kname, flag);
    if (lwp_user_object_add(lwp_self(), (rt_object_t)event) != 0)
    {
        rt_event_delete(event);
        event = NULL;
    }

    kmem_put(kname);

    return event;
}

/**
 * @brief Deletes a system event object.