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authorKeith Packard <keithp@keithp.com>2012-03-04 02:00:13 -0800
committerUlrich Sibiller <uli42@gmx.de>2016-10-19 21:40:25 +0200
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Block for other threads in _XUserLockDisplay
Wait for all other threads to release the user-level lock when acquiring it. This ensures that only one thread at a time holds the user-level lock, necessary as it is a nesting lock and a single variable is used to determine when the lock is nesting and when it is contended. Signed-off-by: Keith Packard <keithp@keithp.com> Reviewed-by: Jamey Sharp <jamey@minilop.net> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
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