Robert and Gerald: Both quite right. Although adding the SAFE_PRINTF made no difference in the output, checking a condition value in a loop made all the difference. Putting a printf in the loop revealed to my surprise that "spurious wakeups" were occurring thousands of times per second. I had naively assumed that a condition would stay set until signalled. Now I'm led to wonder if a condition variable is any performance improvement over a simple loop and short sleep. Any thoughts?
Thanks very much for your time and effort. It was a great help. -- Michael -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
