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