线程共享内存空间的代码验证

demo：

#include <stdio.h>
#include <pthread.h>

int g_data = 0; 

void *func1(void *arg)
{
    printf("t1:%ld pthread is creatn",(unsigned long)pthread_self());
    printf("t1:param is %dn", *((int *)arg));

    while(1){
            printf("t1: %dn",g_data++);
            sleep(1);
    }
 
}

void *func2(void *arg)
{
    printf("t2:%ld pthread is creatn",(unsigned long)pthread_self());
    printf("t2:param is %dn", *((int *)arg));
   
    while(1){
            printf("t2: %dn",g_data++);
            sleep(1);
    }

}

int main()
{

    int ret;
    int param = 100;
    pthread_t t1;
    pthread_t t2;

    ret = pthread_create(&t1, NULL, func1, (void *)&param);
    if(ret == 0){

           printf("main:creat t1 successn");
    }

    ret = pthread_create(&t2, NULL, func2, (void *)&param);
    if(ret == 0){
 
           printf("main:creat t2 successn");
    }

    printf("main:%ldn",(unsigned long)pthread_self());
    while(1){
            printf("main: %dn",g_data++);
            sleep(1);
    }

    pthread_join(t1,NULL);
    pthread_join(t2,NULL); 

    return 0;

}

运行结果：

最后

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