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