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Thread

linux android OS
字数统计: 185阅读时长: 1 min
2019/03/21 Share

Thread in C code user space

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

void *thread_func(void *ptr)
{
    int i;
    for(i=0;i<5;i++)
    {
        printf("New pthread running ,count: %d\n",i);
    }

}

int main(void)
{
    pthread_t pId;
    int i,ret;
    //创建子线程，线程id为pId
    ret = pthread_create(&pId,NULL,thread_func,NULL);

    if(ret != 0)
    {
        printf("create pthread error!\n");
        exit(1);
    }

    for(i=0;i < 3;i++)
    {
        printf("Process running ,count : %d\n",i);
    }

    printf("Process will exit when new pthread is over\n");
    //等待线程pId的完成
    pthread_join(pId,NULL);
    printf("Process exit\n");

    return 0;

}

编译的时候要加上-lpthread, 运行结果如下:

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Process running ,count : 0
New pthread running ,count: 0
Process running ,count : 1
New pthread running ,count: 1
Process running ,count : 2
New pthread running ,count: 2
Process will exit when new pthread is over
New pthread running ,count: 3
New pthread running ,count: 4
Process exit

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