To cite package ‘semaphore’ in publications use:

  Smith D (2024). _semaphore: Shared Memory Atomic Operations_. R
  package version 1.0.2.9000, , <https://github.com/cmmr/semaphore>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {semaphore: Shared Memory Atomic Operations},
    author = {Daniel P. Smith},
    year = {2024},
    note = {R package version 1.0.2.9000, 
},
    url = {https://github.com/cmmr/semaphore},
  }