linux--線程__linux

線程

主要用到3個函數，pthread_create（建立），pthread_exit（退出），pthread_join（等待退出）。

  例子如下：

/* example.c*/#include <stdio.h>#include <pthread.h>void thread(void){int i;for(i=0;i<3;i++)printf("This is a pthread.\n");}int main(void){pthread_t id;int i,ret;ret=pthread_create(&id,NULL,(void *) thread,NULL);if(ret!=0){printf ("Create pthread error!\n");exit (1);}for(i=0;i<3;i++)printf("This is the main process.\n");pthread_join(id,NULL);return (0);}

我們編譯此程式：
gcc example1.c -lpthread -o example1
運行example1，我們得到如下結果：
This is the main process.
This is a pthread.
This is the main process.
This is the main process.
This is a pthread.
This is a pthread.
再次運行，我們可能得到如下結果：
This is a pthread.
This is the main process.
This is a pthread.
This is the main process.
This is a pthread.
This is the main process.