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deepmind.google·6d ago
AI Engineering
Lobsters·Sep 10·11 min read
A quick overview of atomics in C
TL;DR
C11 introduces optional threading in C, allowing for atomic operations to prevent data races. The article details how to safely manage shared resources using atomic variables and memory ordering semantics.
✦ Why It Matters
Implement atomic operations in your C code to ensure safe multi-threading and prevent data races.
Key Takeaways
- Use <threads.h> for multi-threading in C.
- Implement atomic variables with <stdatomic.h> to avoid data races.
- Apply release and acquire semantics for safe memory access.
- Utilize reference counting to manage shared resources effectively.
How It Works
Atomic variables ensure that operations on shared data are completed without interference from other threads. By using release and acquire semantics, developers can control the visibility of changes across threads, ensuring that operations occur in the intended order.