## Macro: SB-EXT:ATOMIC-POP [![package](https://img.shields.io/badge/Package-SB--EXT-5f9ea0.svg?style=social&colorA=999999)](../) [![type](https://img.shields.io/badge/Type-Macro-5f9ea0.svg?style=social&colorA=999999)](../#macro) > Like POP, but atomic. PLACE may be read multiple times before > the operation completes -- the write does not occur until such time > that no other thread modified PLACE between the read and the write. > > Works on all CASable places. ### Lambda list ```cl (sb-impl::place) ```