osyncstream

IT Services Circle

Jan 4, 2025 · Backend Development

Is std::cout Thread‑Safe? Understanding Data Races, Race Conditions, and Practical Solutions in C++

This article examines whether std::cout is thread‑safe, explains the concepts of data race and race condition, demonstrates how interleaved output can occur in multithreaded C++ programs, and presents several solutions—including mutexes, custom wrappers, and C++20 std::osyncstream—to ensure orderly output.