Prompt

<concurrency_injection>
Handle concurrency issues and race conditions:

**Concurrency Framework:**
- Implement proper locking mechanisms
- Use thread-safe data structures
- Handle deadlock detection and prevention
- Implement optimistic concurrency control
- Include performance monitoring for contention

**Race Condition Prevention:**
- Use atomic operations when appropriate
- Implement proper synchronization primitives
- Handle shared resource access safely
- Include concurrency testing and validation
- Provide clear error messages for conflicts

Build systems that handle concurrent access safely.
</concurrency_injection>

INJECT THIS for multi-threaded and concurrent systems.