Principle:Google deepmind Mujoco Plugin System
| Knowledge Sources | Domains | Last Updated |
|---|---|---|
| Google DeepMind MuJoCo | Software Architecture | 2025-02-15 |
Overview
Description: MuJoCo's plugin system provides a thread-safe global registration mechanism for extending the engine with custom functionality. Plugins are registered in a global table and resolved at model compilation time.
Context: The global plugin table enables third-party extensions (custom sensors, actuators, passive forces) to be registered once and referenced by name across multiple model instances. Thread safety is ensured through atomic operations and mutex-protected registration.
Theoretical Basis
Global plugin registration follows the service locator design pattern:
- Global registry: A singleton table maintains mappings from plugin names/slots to plugin descriptors
- Thread safety: Registration uses mutex locking to prevent race conditions; lookups after initialization are lock-free
- Late binding: Plugins are resolved by name at model compilation time, allowing dynamic extension without recompilation of the core engine
This architecture balances extensibility with performance by paying the synchronization cost only at registration time, not during simulation.
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