Linux学习篇（三）Code::Bolcks多线程学习

来源：互联网发布：azul by moussy淘宝编辑：程序博客网时间：2024/05/16 01:19

看书《Linux程序设计（第三版）》在P481页有一个介绍Linux线程的例子，将例子敲入code::blocks后

#include <stdio.h>#include <iostream>#include <unistd.h>#include <stdlib.h>#include <pthread.h>#include <string.h>using namespace std;void *thread_function(void *arg);char message[] = "Hello world";int main(){    pthread_t a_thread;    void *thread_result;    int res = pthread_create(&a_thread,NULL, thread_function, (void*)message);    if( res !=0 ){      perror("Thread creation failed");      exit(EXIT_FAILURE);    }    res = pthread_join(a_thread, &thread_result);    if(res != 0){      perror("Thread join failed");      exit(EXIT_FAILURE);    }    printf("Message is now %s \n", message);    exit(EXIT_SUCCESS);}void *thread_function(void* arg){  printf("thread_function is now %s \n", (char*)arg);  sleep(3);  strcpy(message, "Bye!");  char mes[] = "Thank you for the CPU time";  pthread_exit((void*)mes);}

编译遇到问题2个：
1.#include <string> 时编译报错：strcpy在作用域中未定义，需要将其改为#include <string.h>
2.虽然包含了pthread.h， pthread_create函数仍然报未定义引用的错误，这是因为pthread库不是Linux默认的系统库，需要在code::blocks中包含该库
设置方式为：project->build option->link settings->Link libraries中点击Add，加入pthread库
设置之后再次编译通过

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