进程间或者线程间通过消息队列通讯

最新推荐文章于 2025-04-21 08:45:00 发布

tiger15605353603

最新推荐文章于 2025-04-21 08:45:00 发布

阅读量1.6k

点赞数

CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/tiger15605353603/article/details/81296601

本文详细介绍了如何使用消息队列和多线程技术在C语言环境下实现数据的发送与接收任务。通过创建两个独立的线程，分别负责数据的发送和接收，演示了基于消息队列的数据通信机制。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

#include "stdio.h"
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>

pthread_t  pthread_send;
pthread_t  pthread_rcv;

struct message_lxl{
    int a;
    char *buff;
 }  ;

int msg_sndfd=0;
int msg_sndret=0;
int send_count=0;

struct message_lxl t_message_send;
int pthread_ret;

static void pthread_sendTask()
{

t_message_send.a =1;

 msg_sndfd = msgget(1000,0666|IPC_CREAT);
   if(msg_sndfd<0)
    {
     printf(" pthread_sendTask create 1000 msg fail\n");
    }
   while(1)
    {
        //msg_sndret= msgsnd(msg_sndfd,(void *)(&t_message_send),100,IPC_NOWAIT);// 当队列满时返回错误标志
        msg_sndret= msgsnd(msg_sndfd,(void *)(&t_message_send),strlen("hello \n")+4,0); 
        t_message_send.a ++;
        t_message_send.buff ="hello \n";
        if(msg_sndret==0)
        {
         send_count++;
         printf("msgsnd is suncessful,count is %d \n",send_count);
        }
        else
        {
         printf("msgsnd is fail,err val is %d \n",msg_sndret);
        }

        sleep(2);
    }
}


int msg_rcvfd=0;
int rcv_ret=0;
int rcv_count=0;
struct message_lxl t_message_rcv;

static void   pthread_rcvTask()
{
 sleep(5); // 防止早于send函数就读
 msg_rcvfd = msgget(1000,0666|IPC_CREAT);
  if(msg_rcvfd<0)
   {
    printf("create 1000 msg fail\n");
   }
    while(1)
    {   

         rcv_ret= msgrcv(msg_rcvfd,&t_message_rcv,100,0,0);
         if(rcv_ret>0)
        {
        rcv_count++;
        printf("receive %d msg,val is %d ,rcv_buff is %s\n",rcv_count,t_message_rcv.a,t_message_rcv.buff);
        }
         else if(rcv_ret <0 ){
          printf("msgrcv  fail \n,err is %d",rcv_ret);
         }
    }
}
void main()
{

  pthread_ret=pthread_create(&pthread_send, NULL, (void *)pthread_sendTask, 0);

 if(pthread_ret!=0)  
 {  
     printf("pthread_send Create   error!\n");  

 }  

   pthread_ret=pthread_create(&pthread_rcv, NULL, (void *)pthread_rcvTask, 0);

 if(pthread_ret!=0)  
 {  
     printf("pthread_send Create   error!\n");  

 }  
 pthread_join(pthread_send, NULL);
 pthread_join(pthread_rcv, NULL);

}