Function sys_channel_send_recv_timeout

components/lwp/lwp_syscall.c:4198–4230

* @brief Sends a message through a communication channel and waits for a response with a timeout. * * This system call sends a message (`data`) through a specified communication channel identified by the file descriptor `fd`. * It then waits for a response (`data_ret`) within the specified timeout period. This is a synchronous operation * commonly used in request-response communication pattern

 *          enough to store the expected response to avoid memory issues or data corruption.
 */
sysret_t sys_channel_send_recv_timeout(int fd, rt_channel_msg_t data, rt_channel_msg_t data_ret, rt_int32_t time)
{
    rt_size_t ret = 0;
    rt_channel_msg_t kdata = RT_NULL;
    rt_channel_msg_t kdata_ret = RT_NULL;

    if (!lwp_user_accessable((void *)data, sizeof(*data)))
    {
        return -EFAULT;
    }

    kdata = kmem_get(sizeof(*data));
    if (kdata == RT_NULL)
        return -ENOMEM;

    if (lwp_get_from_user(kdata, data, sizeof(*kdata)) != sizeof(*kdata))
    {
        kmem_put(kdata);
        return -EFAULT;
    }

    kdata_ret = kmem_get(sizeof(*data_ret));
    if (kdata_ret == RT_NULL)
        return -ENOMEM;

    ret = lwp_channel_send_recv_timeout(FDT_TYPE_LWP, fd, kdata, kdata_ret, time);

    lwp_put_to_user(data_ret, kdata_ret, sizeof(*kdata_ret));
    kmem_put(kdata);
    kmem_put(kdata_ret);

    return ret;
}

/**
 * @brief Sends a reply message through a communication channel.