## Function: SB-THREAD:CLEAR-SEMAPHORE-NOTIFICATION [](../) [](../#function) [](https://github.com/sbcl/sbcl/blob/master/src/code/target-thread.lisp/) > Resets the SEMAPHORE-NOTIFICATION object for use with another call to > WAIT-ON-SEMAPHORE or TRY-SEMAPHORE. ### Lambda list ```cl (sb-thread:semaphore-notification) ```