/* * Copyright (c) 2006-2021, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * */ /* * 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 #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_TC static 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