为什么pthread_exit（0）挂起程序？

Question

Running the following C code causes the program to hang, and does not respond to signals (including CTRL-C).

int main()
{
    pthread_exit(0);
    return 0;
}

Any idea why?

The behaviour is normal when other threads have been created and are running, but I would like to know if I always have to check that before using pthread_exit(0).

EDIT: This is the complete code that hangs. However, I was building with glib (-lglib-2.0). Using simply cc -o foo foo.c works as expected.

Answer 1

Your entire use case is described in the notes of the pthread_exit man page . In your case, as you correctly edited your OP, glib started another thread. You exited the main thread and the other thread kept running. You labeled this as a hang. In general, if you want to exit the application in full, just use exit or return from main() .

Only when you need additional magic (rarely) like detached threads, use pthread_exit() on the main thread.