The problem may be in differences in thread implementation on unix and windows. If, for example, cond_broadcast() "nests" in one implementation and not in the other, you may get cascading broadcasts. i.e.

Say you've got 10 threads waiting on the same condition like in your code. When you broadcast, you'll wake up all threads one after another. But in the mean time, one of the threads (the one who's thread id matches the baton) will broadcast. So now you're waking up all threads again while you're not done waking up the rest of the threads, and so on. That might grind the program to a halt fairly quickly if the broadcasts do not terminate when a new broadcast is done on the same condition variable.

Now I'm not sure if that's what happens. If it is, I suspect you'd see the process taking up a lot of CPU time, while if the problem is some kind of deadlock, you'd see the process taking essentially no CPU time at all.

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re^5: baton passing threads and cond_signal by Joost
in thread baton passing threads and cond_signal by Anonymous Monk

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