Bun Foreign Function Interface (FFI)

概要

The Bun FFI skill empowers developers to bridge the gap between JavaScript and native code by providing standardized patterns for calling functions from shared libraries (.dll, .so, .dylib). It offers comprehensive guidance on type mappings, pointer arithmetic, struct definitions, and memory management, making it an essential tool for performance-critical applications, legacy system integration, or accessing low-level system APIs directly from the Bun runtime.

主な機能

• Native library loading and cross-platform path resolution using dlopen
• Complete mapping of C types to Bun FFITypes including pointers and cstrings
• Manual memory management and pointer handling patterns
• Native callback implementation for bi-directional communication
• Struct and buffer manipulation via ArrayBuffer and DataView
• 11 GitHub stars

ユースケース

• Integrating high-performance C++ libraries for image processing or cryptography
• Building high-speed bridge layers for legacy native business logic
• Accessing low-level system APIs like SQLite or hardware drivers directly from TypeScript