Thread Synchronization in C++: A Deep Dive into Condition Variables and Wait Patterns

За събитието

*The event will be in English.

This event is part of the user group C/C++.

Agenda:

Multithreading in C++ isn’t just about protecting data; it’s about waiting efficiently. Active polling burns CPU cycles, while naive sleep() ruins application latency.
This talk explores std::condition_variable — the core tool for event-driven multithreading. We will go beyond basic syntax and dive into OS-level mechanics to understand the physics of thread synchronization.

Key Takeaways:

>>> Under the Hood: How CVs interact with the OS scheduler, and why the mutex and predicate are strictly required.

>>> Performance Benchmarks: Latency and CPU load comparison: sleep vs. condition_variable vs. C++20 std::atomic::wait.

>>> Production Pitfalls: Diagnosing Spurious/Lost wakeups and preventing the „Thundering Herd“ problem (notify_all vs notify_one).

>>> Architectural Patterns: Real-world use cases, including Backpressure handling, batching with wait_for, and Connection Pools.

>>> Modern C++20: When to replace CV with std::atomic::wait, and how to cleanly terminate threads using std::condition_variable_any and std::stop_token.

>>> Target Audience: Middle and Senior C++ developers who want to write latency-critical code and build predictable, resource-efficient multithreaded systems.

>>> Q&A

The event is free, but pre-registration is required.

USER GROUP: C/C++

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WHEN: May 26th, 7:30 pm