运行内存的队列函数

void queue_byte_init(STU_BYTE_QUEUE *Queue,uint8_t *pbuf,uint16_t buf_len)
{
    Queue->in=0;
    Queue->out=0;
    Queue->max_buf=buf_len;
    Queue->buf=pbuf;
}
/*
return : 
true: queue is empty
false: queue have data
*/
bool queue_byte_is_empty(STU_BYTE_QUEUE *Queue)
{
    if(Queue->in==Queue->out)
      return true;
    else
      return false;
}
/*
return : 
true: queue empty
false: queue full
*/
bool queue_byte_in(STU_BYTE_QUEUE *Queue,uint8_t datain)
{   
    bool ret=true;
    if(((Queue->in+1)%Queue->max_buf)==Queue->out)//queue is full
    {
      ret=false;
    }

        Queue->buf[Queue->in] = datain;
        Queue->in++;
        Queue->in%=Queue->max_buf;
        return ret;
}
/*
para:   pdata--------->point out data
return : 
true:have data in queue
false:no data in queue
*/
bool queue_byte_out(STU_BYTE_QUEUE *Queue,uint8_t *pdata)
{
    if(Queue->in == Queue->out) 
    {
        return false;
    }  else
    {
        *pdata = Queue->buf[Queue->out];
        Queue->out++;
        Queue->out%=Queue->max_buf;
        return true;
    }
}