pthread_cancel可以（）购买Android NDK的选择吗？ [英] pthread_cancel() alternatives in Android NDK?

问题描述

我移植的C ++ code的中型体的Andr​​oid NDK。不幸的是，pthreads实现（如NDK V5，反正）是不完整的。具体来说，我们的应用程序依赖于pthread_cancel可以（）杀死一个工作线程。 NDK没有实现pthread_cancel可以（）！有些情况下，工作线程正常响应等明显的答案。但在情况下，工作线程没有响应（例如无限循环），我怎么能取消它不会杀死的全过程？

I am porting a mid-sized body of C++ code to Android NDK. Unfortunately the pthreads implementation (as of NDK v5, anyway) is incomplete. Specifically, our application relies on pthread_cancel() to kill a worker thread. NDK does not implement pthread_cancel()! There are other obvious answers when the worker thread is responding normally. But in cases where the worker thread is not responding (e.g. infinite loop), how can I cancel it without killing the whole process?

推荐答案

这是这家伙的作品可能的选择：<一href=\"http://igourd.blogspot.com/2009/05/work-around-on-pthreadcancel-for.html\">http://igourd.blogspot.com/2009/05/work-around-on-pthreadcancel-for.html

Possible option that works for this guy: http://igourd.blogspot.com/2009/05/work-around-on-pthreadcancel-for.html

转贴在这里情况：

然后我用pthread_kill触发
  SIG_USR1信号和使用信号处理程序
  退出该pthread的和试了一下，
  工作原理，但如果有的话仍然不知道
  缺点对于这种方法。

Then I use pthread_kill to trigger a SIG_USR1 signal and use signal handler to exit this pthread and tried it, it works, but still wondering if any drawbacks for this kind of method.

定时器出来：

if ( (status = pthread_kill(pthread_id, SIGUSR1)) != 0) 
{ 
    printf("Error cancelling thread %d, error = %d (%s)", pthread_id, status, strerror status));
} 

USR1处理程序：

USR1 handler:

struct sigaction actions;
memset(&actions, 0, sizeof(actions)); 
sigemptyset(&actions.sa_mask);
actions.sa_flags = 0; 
actions.sa_handler = thread_exit_handler;
rc = sigaction(SIGUSR1,&actions,NULL);
void thread_exit_handler(int sig)
{ 
    printf("this signal is %d \n", sig);
    pthread_exit(0);
}

看起来像最好的答案是重写，使线程不等待IO：<一href=\"http://groups.google.com/group/android-platform/browse_thread/thread/0aad393da2da65b1\">http://groups.google.com/group/android-platform/browse_thread/thread/0aad393da2da65b1

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