| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167 | /* * 程序清单:消息队列例程 * * 这个程序会创建3个动态线程,一个线程会从消息队列中收取消息;一个线程会定时给消 * 息队列发送消息;一个线程会定时给消息队列发送紧急消息。 */#include <rtthread.h>#include "tc_comm.h"/* 指向线程控制块的指针 */static rt_thread_t tid1 = RT_NULL;static rt_thread_t tid2 = RT_NULL;static rt_thread_t tid3 = RT_NULL;/* 消息队列控制块 */static struct rt_messagequeue mq;/* 消息队列中用到的放置消息的内存池 */static char msg_pool[2048];/* 线程1入口函数 */static void thread1_entry(void* parameter){    char buf[128];    while (1)    {        rt_memset(&buf[0], 0, sizeof(buf));        /* 从消息队列中接收消息 */        if (rt_mq_recv(&mq, &buf[0], sizeof(buf), RT_WAITING_FOREVER) == RT_EOK)        {            rt_kprintf("thread1: recv msg from message queue, the content:%s\n", buf);        }        /* 延迟10个OS Tick */        rt_thread_delay(10);    }}/* 线程2入口函数 */static void thread2_entry(void* parameter){    int i, result;    char buf[] = "this is message No.x";    while (1)    {        for (i = 0; i < 10; i++)        {            buf[sizeof(buf) - 2] = '0' + i;            rt_kprintf("thread2: send message - %s\n", buf);            /* 发送消息到消息队列中 */            result = rt_mq_send(&mq, &buf[0], sizeof(buf));            if ( result == -RT_EFULL)            {                /* 消息队列满, 延迟1s时间 */                rt_kprintf("message queue full, delay 1s\n");                rt_thread_delay(100);            }        }        /* 延时10个OS Tick */        rt_thread_delay(10);    }}/* 线程3入口函数 */static void thread3_entry(void* parameter){    char buf[] = "this is an urgent message!";    while (1)    {        rt_kprintf("thread3: send an urgent message\n");        /* 发送紧急消息到消息队列中 */        rt_mq_urgent(&mq, &buf[0], sizeof(buf));        /* 延时25个OS Tick */        rt_thread_delay(25);    }}int messageq_simple_init(){    /* 初始化消息队列 */    rt_mq_init(&mq, "mqt",               &msg_pool[0],        /* 内存池指向msg_pool */               128 - sizeof(void*), /* 每个消息的大小是 128 - void* */               sizeof(msg_pool),    /* 内存池的大小是msg_pool的大小 */               RT_IPC_FLAG_FIFO);   /* 如果有多个线程等待,按照先来先得到的方法分配消息 */    /* 创建线程1 */    tid1 = rt_thread_create("t1",                            thread1_entry, RT_NULL, /* 线程入口是thread1_entry, 入口参数是RT_NULL */                            THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE);    if (tid1 != RT_NULL)        rt_thread_startup(tid1);    else        tc_stat(TC_STAT_END | TC_STAT_FAILED);    /* 创建线程2 */    tid2 = rt_thread_create("t2",                            thread2_entry, RT_NULL, /* 线程入口是thread2_entry, 入口参数是RT_NULL */                            THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE);    if (tid2 != RT_NULL)        rt_thread_startup(tid2);    else        tc_stat(TC_STAT_END | TC_STAT_FAILED);    /* 创建线程3 */    tid3 = rt_thread_create("t3",                            thread3_entry, RT_NULL, /* 线程入口是thread2_entry, 入口参数是RT_NULL */                            THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE);    if (tid3 != RT_NULL)        rt_thread_startup(tid3);    else        tc_stat(TC_STAT_END | TC_STAT_FAILED);    return 0;}#ifdef RT_USING_TCstatic void _tc_cleanup(){    /* 调度器上锁,上锁后,将不再切换到其他线程,仅响应中断 */    rt_enter_critical();    /* 删除线程 */    if (tid1 != RT_NULL && tid1->stat != RT_THREAD_CLOSE)        rt_thread_delete(tid1);    if (tid2 != RT_NULL && tid2->stat != RT_THREAD_CLOSE)        rt_thread_delete(tid2);    if (tid3 != RT_NULL && tid3->stat != RT_THREAD_CLOSE)        rt_thread_delete(tid3);    /* 执行消息队列对象脱离 */    rt_mq_detach(&mq);    /* 调度器解锁 */    rt_exit_critical();    /* 设置TestCase状态 */    tc_done(TC_STAT_PASSED);}int _tc_messageq_simple(){    /* 设置TestCase清理回调函数 */    tc_cleanup(_tc_cleanup);    messageq_simple_init();    /* 返回TestCase运行的最长时间 */    return 100;}/* 输出函数命令到finsh shell中 */FINSH_FUNCTION_EXPORT(_tc_messageq_simple, a simple message queue example);#else/* 用户应用入口 */int rt_application_init(){    messageq_simple_init();    return 0;}#endif
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