Middleware

This module summarizes the middleware components in LibXR used for system services, communication management, and terminal interaction.

Features

• Unified Abstraction: Provides core middleware functions such as event handling, logging, topic publishing, and virtual terminals.
• Multiple Operation Models: Supports synchronous, asynchronous, queued, and callback-based modes for different scenarios.
• High Performance: Heavily utilizes lock-free lists and queues internally to ensure concurrent performance.
• Embedded Adaptation: Supports flash minimum write unit constraints and key-value storage on memory-constrained devices.

Contents

• Application Framework
• Logger System
• Event System
• Message System
• Database Key-Value Storage
• RamFS In-Memory File System
• Terminal Command Interface

Notes:

• In current mainline, the message subsystem is no longer best understood as one catch-all page; the contracts and tradeoffs of Topic, Packet/Server, and LinuxSharedTopic are split into their own pages and should be read there.
• Current RamFS public docs are based on the Custom node model, not the older Device node model that appeared in older materials.

For detailed API descriptions, see the individual pages.