【求助】主线程如何杀死正在执行的子线程？

benlan

system("
killall pid
or
kill -9 pid
")

redac

使用楼上的方法的话整个进程都被杀掉了!!!

caijimin

看看下面这段，是否有帮助。

Never terminate the thread from outside the thread. Always terminate the thread from within the thread itself. If the thread isn't allowed to terminate itself, it will continue to consume resources even after the app is closed. Resources being memory for stack space and thread local storage, objects that are created by the thread, file buffers, etc.

Your thread will typically be running in a loop. If it's not, it will terminate automatically when it hits a return statement in the thread function or at the end of the thread function.
While looping in the thread function there are a couple of things you can do.

1. Periodically check the status of a flag variable that indicates to exit the thread (The flag can be set externally to the thread itself), and exit the loop once the flag is set.

2. Periodically check for an event to have occurred using one of the wait functions.

jemy.zhang

我是这样做的，
fork进程以后，记住子进程的进程号pid,然后kill(pid,9);就可以了。

或者通过管道向子进程发送自杀信号，子进程在循环中检测信号，一旦检测到主进程要求子进程“自杀”，那么子进程就可以exit了

1. 
   
2. //子进程，检测信号
   
3.        while(1)
   
4.         {
   
5.             pipe_read(CMDPIPE,pipe_info);//读取管道
   
6.             if(pipe_info->sig_term == 1) //
   
7.             {
   
8.                 free(pipe_info);
   
9.                 kill(pid,9);//同时结束另外一个子进程
   
10.                  return(1);//自身退出
    
11.             }
    
12.             sleep(1);
    
13.         }
    

复制代码

[ 本帖最后由 jemy.zhang 于 2007-3-2 12:55 编辑 ]

caijimin

原帖由 jemy.zhang 于 2007-3-2 12:46 发表
我是这样做的，
fork进程以后，记住子进程的进程号pid,然后kill(pid,9);就可以了。

或者通过管道向子进程发送自杀信号，子进程在循环中检测信号，一旦检测到主进程要求子进程“自杀”，那么子进程就可以exit了 ...

楼主是说要杀子线程吧， 不是子进程

jemy.zhang

哦。。。。看错了，呼呼呼~

不过有谁能说说进程和线程的区别啊？忘记了似乎

柳五随风

原帖由 caijimin 于 2007-3-2 09:36 发表
看看下面这段，是否有帮助。

Never terminate the thread from outside the thread. Always terminate the thread from within the thread itself. If the thread isn't allowed to terminate itself, it will ...

这个已经说得相当的明白了。

hubei_1218

楼主在线程函数死循环里面加上cancellation函数例如pthread_testcancel,因为线程创建出来初始状态是PTHREAD_CANCEL_DEFERRED的,也就是线程需要运行到cancellation point才会响应其他线程的cancel request,不知道说明白没有.