wave4-jobhandle-combine-dependencies

What problem does it solve?

Prevents race conditions in Unity DOTS when a downstream job depends on results from multiple independent upstream jobs by creating a correct fan-in dependency barrier.

Core Features & Use Cases

• Fan-in barriers for parallel producers: Use JobHandle.CombineDependencies to ensure a downstream job waits for multiple upstream job handles before reading shared component data.
• Converging job DAG pipelines: Perfect for multi-stage pipelines like spatial-hash → accumulate → steer where several parallel stages must finish before reduction.
• Scales to many dependencies: Supports combining 2+ handles efficiently, including the NativeArray overload for more than 3 inputs.

Quick Start

Ask the AI how to replace a missing or sequential dependency chain with JobHandle.CombineDependencies by providing the upstream job handles and the downstream job assignment to state.Dependency.