exception in multithread env

Posted: 03/21/09 03:16:21

set demon state seems no help here, the exception is occured in sub thread which will be terminated, but the main thread is still running. so I think the only way is check state of an owned thread in the main thread, but how can I do that? I can't find a way to do this in tango.core.Thread.

Posted: 03/21/09 07:46:36

thread.join will wait thread to complete, so you can't test a thread state in a loop. the problem is the main thread can't run as a loop, i have to rewrite the code as follow:

void testa() {

while(1) {

throw new Exception("test");

}

}

void testb() {

while(1) {

//do some stuff Thread.sleep(1);

}

}

void main() {

auto thread1 = new Thread(&testa);

thread1.isDaemon = true;

thread1.start();

auto thread2 = new Thread(&testb);

thread2.isDaemon = true;

thread2.start();

thread1.join(); thread2.join();

}

this can resolve my problem, though add a thread unnecessary. I think it's better to terminated the program when a unhandled exception occured whatever.

kris, thanks for the help! The problem bored me some time indeed.

Posted: 03/22/09 02:45:03

you can always extend/subclass Thread to do whatever application-specific things you need. Untested example:

class MyThread : Thread
{
    public char[] failed = null;

    override void run()
    {
        try {
            // implement thread code
            // ...
            } catch (Exception e)
                     failed = e.toString;
    }
}

Posted: 03/22/09 04:27:48

Tango does not kill the primary thread when some other thread encounters an error. That would seem to be application-specific behavior :)