[bug #28757] [NSThread sleepUntilDate:] in this example uses 100% of a CPU while sleeping on MinGW

[Richard Frith-Macdonald]

Update of bug #28757 (project gnustep):

                  Status:            Works For Me => Fixed                  
             Open/Closed:                    Open => Closed                 

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Follow-up Comment #3:

Found this ...
If the configure script detects the usleep() function, the code uses that
(because it has microsecond granularity) rather than the Sleep() function
(millisecond granularity).
Unfortunately, on windows usleep() performs a busy wait using the cpu.
I fixed this by changing the code so that, on windows, it  always uses
Sleep() except for small intervals (under 0.1 sec) where we might reasonably
need higher accuracy. 

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