Function sys_event_recv

components/lwp/lwp_syscall.c:2267–2288

* @brief Receives an event from the specified event object. * * This system call waits for an event to be received from the specified * event object. The function blocks until the specified event bits are * set in the event object's set or the specified timeout period has * elapsed. If the event is received, the function returns the set of * bits that were set in the event object. * * @par

 * @see sys_event_create(), sys_event_send()
 */
sysret_t sys_event_recv(rt_event_t   event,
                       rt_uint32_t  set,
                       rt_uint8_t   opt,
                       rt_int32_t   timeout,
                       rt_uint32_t *recved)
{
    int ret = 0;
    rt_uint32_t krecved;

    if ((recved != NULL) && !lwp_user_accessable((void *)recved, sizeof(rt_uint32_t *)))
    {
        return -EFAULT;
    }

    ret = rt_event_recv(event, set, opt, timeout, &krecved);
    if ((ret == RT_EOK) && recved)
    {
        lwp_put_to_user((void *)recved, &krecved, sizeof(rt_uint32_t *));
    }

    return ret;
}

/**
 * @brief Creates a mailbox for inter-thread or inter-process communication.