Skip to content
Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

mutex

A lock that lets only one thread at a time into a section of code.

A std::mutex provides mutual exclusion; lock it with an RAII guard (std::scoped_lock, std::lock_guard, std::unique_lock) so it is always released.

Read the full section →