118 lines
3.2 KiB
C
118 lines
3.2 KiB
C
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/*
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* 程序清单：邮箱例程
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*
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* 这个程序会创建2个动态线程，一个静态的邮箱对象，其中一个线程往邮箱中发送邮件，
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* 一个线程往邮箱中收取邮件。
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*/
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#include <rtthread.h>
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#define THREAD_PRIORITY 10
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#define THREAD_TIMESLICE 5
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/* 邮箱控制块 */
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static struct rt_mailbox mb;
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/* 用于放邮件的内存池 */
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static char mb_pool[128];
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static char mb_str1[] = "I'm a mail!";
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static char mb_str2[] = "this is another mail!";
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static char mb_str3[] = "over";
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static char thread1_stack[1024];
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static struct rt_thread thread1;
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/* 线程1入口 */
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static void thread1_entry(void *parameter)
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{
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char *str;
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while (1)
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{
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rt_kprintf("thread1: try to recv a mail\n");
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/* 从邮箱中收取邮件 */
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if (rt_mb_recv(&mb, (rt_ubase_t *)&str, RT_WAITING_FOREVER) == RT_EOK)
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{
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rt_kprintf("thread1: get a mail from mailbox, the content:%s\n", str);
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if (str == mb_str3)
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break;
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/* 延时100ms */
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rt_thread_mdelay(100);
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}
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}
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/* 执行邮箱对象脱离 */
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rt_mb_detach(&mb);
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}
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static char thread2_stack[1024];
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static struct rt_thread thread2;
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/* 线程2入口 */
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static void thread2_entry(void *parameter)
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{
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rt_uint8_t count;
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count = 0; // 初始化计数器为0
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while (count < 10) // 循环10次
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{
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count ++; // 计数器递增
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if (count & 0x1) // 判断计数器是否为奇数
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{
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/* 发送mb_str1地址到邮箱中 */
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rt_mb_send(&mb, (rt_uint32_t)&mb_str1);
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}
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else // 否则，即计数器为偶数
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{
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/* 发送mb_str2地址到邮箱中 */
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rt_mb_send(&mb, (rt_uint32_t)&mb_str2);
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}
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/* 延时200ms */
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rt_thread_mdelay(200);
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}
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/* 发送邮件告诉线程1，线程2已经运行结束 */
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rt_mb_send(&mb, (rt_uint32_t)&mb_str3);
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}
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int mailbox_sample(void)
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{
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rt_err_t result;
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/* 初始化一个mailbox */
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result = rt_mb_init(&mb,
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"mbt", /* 名称是mbt */
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&mb_pool[0], /* 邮箱用到的内存池是mb_pool */
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sizeof(mb_pool) / sizeof(rt_ubase_t), /* 邮箱中的邮件数目,sizeof(rt_ubase_t)表示指针大小 */
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RT_IPC_FLAG_PRIO); /* 采用PRIO方式进行线程等待 */
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if (result != RT_EOK)
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{
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rt_kprintf("init mailbox failed.\n");
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return -1;
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}
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rt_thread_init(&thread1,
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"thread1",
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thread1_entry,
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RT_NULL,
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&thread1_stack[0],
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sizeof(thread1_stack),
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THREAD_PRIORITY, THREAD_TIMESLICE);
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rt_thread_startup(&thread1);
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rt_thread_init(&thread2,
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"thread2",
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thread2_entry,
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RT_NULL,
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&thread2_stack[0],
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sizeof(thread2_stack),
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THREAD_PRIORITY, THREAD_TIMESLICE);
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rt_thread_startup(&thread2);
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return 0;
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}
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/* 导出到 msh 命令列表中 */
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MSH_CMD_EXPORT(mailbox_sample, mailbox sample);
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