tls_os_queue_send和tls_os_queue_receive應怎麼使用？

/***************************************************************************** 
* 
* File Name : main.c
* 
* Description: main 
* 
* Copyright (c) 2014 Winner Micro Electronic Design Co., Ltd. 
* All rights reserved. 
* 
* Author : dave
* 
* Date : 2014-6-14
*****************************************************************************/ 
#include "wm_include.h"

#define USER_TASK_QUEUE_SIZE             1
#define USER_TASK_QUEUE_TEST             0x01
static tls_os_queue_t *user_task_queue = NULL;

static OS_STK TaskStk1[512];
static OS_STK TaskStk2[512];



static void user_task1(void)
{

    while(1)
    {
        printf("---> send msg\r\n");
        // 發送隊裡消息
        tls_os_queue_send(user_task_queue, (void *)USER_TASK_QUEUE_TEST, 0);
        tls_os_time_delay(HZ);
    }
}

static void user_task2(void)
{
    void *msg;
    tls_os_status_t ret;

    for ( ; ; )
    {
        // 接收隊裡消息
        ret= tls_os_queue_receive(user_task_queue, (void **)&msg, 0, 0);
        if (ret == TLS_OS_SUCCESS)
        {
            switch((u32)msg)
            {
            case USER_TASK_QUEUE_TEST: // 收到指定的消息
                printf("---> received msg\r\n");
                break;

            default:
                break;
            }
        }
    }
}

void UserMain(void)
{
    printf("\n user task \n");
    // 創建task1用於發送隊列消息
    tls_os_task_create(NULL, "task1",
                        ( void (*))user_task1,
                        NULL,
                        (void *)TaskStk1,          /* task's stack start address */
                        sizeof(TaskStk1), /* task's stack size, unit:byte */
                        31,
                        0);
    // 創建task2用於接收隊裡消息
    tls_os_task_create(NULL, "task2",
                        ( void (*))user_task2,
                        NULL,
                        (void *)TaskStk2,          /* task's stack start address */
                        sizeof(TaskStk2), /* task's stack size, unit:byte */
                        32,
                        0);
    // 創建消息隊列
    tls_os_queue_create(&user_task_queue, USER_TASK_QUEUE_SIZE);

#if DEMO_CONSOLE
    CreateDemoTask();
#endif
//用戶自己的task
}