1. What the proper way to the main thread to wait for all co-threads
until finished?
2. After calling pthread_cond_signal() or pthread_cond_broadcast()
followed by sleep()/nanosleep(),
the condition variable looks like not signaled, (the co-thread
routine doesn't run). What make this?
I think you need a pthread_cond_broadcast () after do_work () in each
thread.
Regards,
Seenu.
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