#mutex

static std::mutex is safe to construct, thanks to magic statics

Before osyncstream, the fix for a shared log sink was a static std::mutex. But is the static mutex itself safe to initialize under threads? Yes, thanks to C++11 magic statics: a function-local static is constructed exactly once even under a stampede. With the mutex-versus-osyncstream trade-off. Episode 3 of the concurrent I/O series.

• #concurrency
• #threads
• #mutex
• #cpp11