This article explains C++20's std::counting_semaphore and std::binary_semaphore, covering their APIs, use cases like thread pool limiting and inter-thread signaling, and features such as timed waiting and RAII helpers.
Background
C++20 introduced standardized synchronization primitives including semaphores, addressing a long-standing gap in the C++ standard library for thread coordination beyond mutexes and condition variables.
- Source
- Lobsters
- Published
- Aug 9, 2026 at 04:44 AM
- Score
- 5.0 / 10