linux使用共享内存实现进程间通信源码

#include<stdio.h>
#include<sys/shm.h>
#include<stdlib.h>
#include<string.h>
#include<sys/ipc.h>
int main()
{
        int shmid;
        char *shmaddr;
        key_t key;
        key = ftok(".",1);//获取key的ID值
        shmid = shmget(key,1024*4,IPC_CREAT|0666);//创建共享内存
        if(shmid == -1){//测试是否创建成功，-1为创建失败
                printf("shmget no OK\n");
                exit(-1);
        }
        shmaddr = shmat(shmid,0,0);//映射
        printf("shmat ok\n");
        strcpy(shmaddr,"liuzhihao");//传递数据
        sleep(5);//睡5秒
        shmdt(shmaddr);//释放共享内存数据
        shmctl(shmid,IPC_RMID,0);删除共享内存
        printf("quit\n");//打印退出
        return 0;
}
~                                                                                                                  
~                       

#include<stdio.h>
#include<sys/shm.h>
#include<stdlib.h>
#include<string.h>
#include<sys/ipc.h>
int main()
{
        int shmid;
        char *shmaddr;
        key_t key;
        key = ftok(".",1);//获取key的ID值
        shmid = shmget(key,1024*4,0);//创建共享内存
        if(shmid == -1){
                printf("shmget no OK\n");
                exit(-1);
        }
        shmaddr = shmat(shmid,0,0);//映射
        printf("shmat ok\n");
        printf("data:%s \n",shmaddr);//打印输出数据
        shmdt(shmaddr);//释放读取的数据
        printf("quit\n");//打印关闭
        return 0;
}
~