## Function: SB-THREAD:CLEAR-SEMAPHORE-NOTIFICATION [![package](https://img.shields.io/badge/Package-SB--THREAD-5f9ea0.svg?style=social&colorA=999999)](../) [![type](https://img.shields.io/badge/Type-Function-5f9ea0.svg?style=social&colorA=999999)](../#function) [![github](https://img.shields.io/badge/GitHub-View_the_source-5f9ea0.svg?style=social&colorA=999999&logo=github)](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) ```