Re: two questions about thread
Kevin wrote: The best way to do this is by using a flag or event that the child-threads monitor each loop (or multiple times per loop if it's a long loop). If the flag is set, they exit themselves. The parent thread only has to set the flag to cause the children to die. Doesn't work, because threads can be blocked. Worse, some threads may be blocked waiting for others to release them. The unblocked threads check the flag and exit, so they're never signal the blocked ones. -- --Bryan -- http://mail.python.org/mailman/listinfo/python-list
Re: two questions about thread
The best way to do this is by using a flag or event that the child-threads monitor each loop (or multiple times per loop if it's a long loop). If the flag is set, they exit themselves. The parent thread only has to set the flag to cause the children to die. Kevin. Bryan Olson [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] iclinux wrote: a. how to exit the whole process in a thread? b. when thread doing a infinite loops, how to terminate the process?: As others noted, the threading module offers Thread.setDaemon. As the doc says: The entire Python program exits when no active non-daemon threads are left. Python starts your program with one (non-daemon) thread which is sometimes called the main thread. I suggest creating all other threads as daemons. The process will then exit when the main thread exits. If some other thread needs to end the process, it does so by telling the main thread to exit. For example, we might leave the main thread waiting at a lock (or semaphore), and exit if the lock is ever released. it seems that the follow doesn't work, in my Windows XP: thread.start() thread.join() Is that part of the questions above, or another issue? -- --Bryan -- http://mail.python.org/mailman/listinfo/python-list
two questions about thread
hi there, I'm new to python, and have two questions: a. how to exit the whole process in a thread? b. when thread doing a infinite loops, how to terminate the process?: it seems that the follow doesn't work, in my Windows XP: thread.start() thread.join() Regards -- http://mail.python.org/mailman/listinfo/python-list
Re: two questions about thread
iclinux wrote: hi there, I'm new to python, and have two questions: a. how to exit the whole process in a thread? sys.exit() Works only if Thread.setDaemon(True) is invoked on all threads. b. when thread doing a infinite loops, how to terminate the process?: it seems that the follow doesn't work, in my Windows XP: thread.start() thread.join() It works. You just don't understand _how_ it works. There is no (easy, without major pain performance- and stability-wise and corner-case-free) way to terminate a thread. If you want that, use a subprocess e.g. pyro as RPC mechanism. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: two questions about thread
iclinux wrote: a. how to exit the whole process in a thread? b. when thread doing a infinite loops, how to terminate the process?: As others noted, the threading module offers Thread.setDaemon. As the doc says: The entire Python program exits when no active non-daemon threads are left. Python starts your program with one (non-daemon) thread which is sometimes called the main thread. I suggest creating all other threads as daemons. The process will then exit when the main thread exits. If some other thread needs to end the process, it does so by telling the main thread to exit. For example, we might leave the main thread waiting at a lock (or semaphore), and exit if the lock is ever released. it seems that the follow doesn't work, in my Windows XP: thread.start() thread.join() Is that part of the questions above, or another issue? -- --Bryan -- http://mail.python.org/mailman/listinfo/python-list
