RT-Thread-一个线程是否可以支持多个事件集的接收RT-Thread问答社区

一个线程是否可以支持多个事件集的接收

发布于 2020-03-27 22:16:57 浏览：1240 订阅该版

* 本帖最后由 bin5219 于 2020-3-27 22:22 编辑 *

一个线程是否可以支持多个事件集的接收，伪代码如下
static void thread1(void *param)
{
        if (rt_event_recv(&event, (EVENT_FLAG0  | EVENT_FLAG1  | EVENT_FLAG2 ),
                      RT_EVENT_FLAG_AND | RT_EVENT_FLAG_CLEAR,
                      RT_WAITING_FOREVER, &e) == RT_EOK)
    {
        ..........
    }

if (rt_event_recv(&event2, (EVENT_FLAG0  | EVENT_FLAG1  | EVENT_FLAG2 ),
                      RT_EVENT_FLAG_AND | RT_EVENT_FLAG_CLEAR,
                      RT_WAITING_FOREVER, &e) == RT_EOK)
    {
        ..........
    }

}

```
```自己试了一下，接收和发送都没有问题。疑问在于，线程控制块中 event_set 是一个32位的，如何保证了对两个事件准确无误的解析了呢？请论坛里大神 不吝赐教 感谢 感谢

具体的测试代码和仿真结果如下：

#define EVENT_FLAG0 ((unsigned int)1 << 0)
#define EVENT_FLAG1 ((unsigned int)1 << 1)
#define EVENT_FLAG2 ((unsigned int)1 << 2)
#define EVENT_FLAG3 ((unsigned int)1 << 3)
#define EVENT_FLAG4 ((unsigned int)1 << 4)
#define EVENT_FLAG5 ((unsigned int)1 << 5)
#define EVENT_FLAG6 ((unsigned int)1 << 6)
#define EVENT_FLAG7 ((unsigned int)1 << 7)
#define EVENT_FLAG8 ((unsigned int)1 << 8)
#define EVENT_FLAG9 ((unsigned int)1 << 9)
#define EVENT_FLAG10 ((unsigned int)1 << 10)
#define EVENT_FLAG11 ((unsigned int)1 << 11)
#define EVENT_FLAG12 ((unsigned int)1 << 12)
#define EVENT_FLAG13 ((unsigned int)1 << 13)
#define EVENT_FLAG14 ((unsigned int)1 << 14)
#define EVENT_FLAG15 ((unsigned int)1 << 15)
#define EVENT_FLAG16 ((unsigned int)1 << 16)
#define EVENT_FLAG17 ((unsigned int)1 << 17)
#define EVENT_FLAG18 ((unsigned int)1 << 18)
#define EVENT_FLAG19 ((unsigned int)1 << 19)
#define EVENT_FLAG20 ((unsigned int)1 << 20)
#define EVENT_FLAG21 ((unsigned int)1 << 21)
#define EVENT_FLAG22 ((unsigned int)1 << 22)
#define EVENT_FLAG23 ((unsigned int)1 << 23)
#define EVENT_FLAG24 ((unsigned int)1 << 24)
#define EVENT_FLAG25 ((unsigned int)1 << 25)
#define EVENT_FLAG26 ((unsigned int)1 << 26)
#define EVENT_FLAG27 ((unsigned int)1 << 27)
#define EVENT_FLAG28 ((unsigned int)1 << 28)
#define EVENT_FLAG29 ((unsigned int)1 << 29)
#define EVENT_FLAG30 ((unsigned int)1 << 30)
#define EVENT_FLAG31 ((unsigned int)1 << 31)

/* 线程1入口函数 */
static void thread1_recv_event(void *param)
{
    rt_uint32_t e;

if (rt_event_recv(&event, (EVENT_FLAG0 | EVENT_FLAG1 | EVENT_FLAG2 | EVENT_FLAG3 |	\
							 EVENT_FLAG4 | EVENT_FLAG5 | EVENT_FLAG6 | EVENT_FLAG7 |	\
							 EVENT_FLAG8 | EVENT_FLAG9 | EVENT_FLAG10 | EVENT_FLAG11 |	\
							 EVENT_FLAG12 | EVENT_FLAG13 | EVENT_FLAG14 | EVENT_FLAG15 |	\
							 EVENT_FLAG16 | EVENT_FLAG17 | EVENT_FLAG18 | EVENT_FLAG19 |	\
							 EVENT_FLAG20 | EVENT_FLAG21 | EVENT_FLAG22 | EVENT_FLAG23 |	\
							 EVENT_FLAG24 | EVENT_FLAG25 | EVENT_FLAG26 | EVENT_FLAG27 |	\
							 EVENT_FLAG28 | EVENT_FLAG29 | EVENT_FLAG30 | EVENT_FLAG31),
 RT_EVENT_FLAG_AND | RT_EVENT_FLAG_CLEAR,
 RT_WAITING_FOREVER, &e) == RT_EOK)
 {
 rt_kprintf("thread1: AND recv event 0x%x ", e);
 }
	e = 0;
	if (rt_event_recv(&event2, (EVENT_FLAG0 | EVENT_FLAG1 | EVENT_FLAG2 | EVENT_FLAG3 |	\
							 EVENT_FLAG4 | EVENT_FLAG5 | EVENT_FLAG6 | EVENT_FLAG7 |	\
							 EVENT_FLAG8 | EVENT_FLAG9 | EVENT_FLAG10 | EVENT_FLAG11 |	\
							 EVENT_FLAG12 | EVENT_FLAG13 | EVENT_FLAG14 | EVENT_FLAG15 |	\
							 EVENT_FLAG16 | EVENT_FLAG17 | EVENT_FLAG18 | EVENT_FLAG19 |	\
							 EVENT_FLAG20 | EVENT_FLAG21 | EVENT_FLAG22 | EVENT_FLAG23 |	\
							 EVENT_FLAG24 | EVENT_FLAG25 | EVENT_FLAG26 | EVENT_FLAG27 |	\
							 EVENT_FLAG28 | EVENT_FLAG29 | EVENT_FLAG30 | EVENT_FLAG31),
 RT_EVENT_FLAG_AND | RT_EVENT_FLAG_CLEAR,
 RT_WAITING_FOREVER, &e) == RT_EOK)
 {
 rt_kprintf("thread1: AND recv event2 0x%x ", e);
 }
	
 rt_kprintf("thread1 leave. ");
}

/* 线程2入口 */
static void thread2_send_event(void *param)
{   
    rt_thread_mdelay(10);

rt_kprintf("thread2 leave. ");
}
```
```
仿真的结果如下：
![批注 2020-03-27 221256.jpg](/uploads/202003/27/221317i4n8s8lbl7zopsbl.jpg)