-/* Set to rtsTrue if there are threads on the blackhole_queue, and
- * it is possible that one or more of them may be available to run.
- * This flag is set to rtsFalse after we've checked the queue, and
- * set to rtsTrue just before we run some Haskell code. It is used
- * to decide whether we should yield the Capability or not.
- * Locks required : none (see scheduleCheckBlackHoles()).
- */
-extern rtsBool blackholes_need_checking;
-