WebAssembly port of libffi - Portable foreign function interface library providing a C interface to other programming languages.

A comprehensive WebAssembly implementation of libffi v3.5.2 with TypeScript-first developer experience, SIMD optimizations, and WASM-native features.

• Full API support - All standard libffi functions including Raw API, closures, and Go closures
• WASM32/WASM64 - Automatic detection and support for both pointer sizes
• Complex numbers - Complete support for complex float, double, and long double
• Variadic functions - Full printf-style variadic function support

• TypeScript-first API - Object-oriented interface with complete type safety
• CDN dynamic loading - Load from wasm.discere.cloud with fallback support
• SIMD bulk operations - 16-byte vector operations for performance-critical paths
• ES6 module output - Modern JavaScript integration with proper exports

• 25M+ CIF preparations/sec - Optimized call interface setup
• SIMD memory operations - Fast bulk clearing and copying for ≥16 byte operations
• Memory pooling - Reduced allocation overhead for frequent operations
• LTO + Closure Compiler - Maximum optimization with dead code elimination

npm install @discere-os/libffi.wasm

import LibFFI, { FFIType } from '@discere-os/libffi.wasm'

const ffi = new LibFFI()
await ffi.initialize()

const intType = { size: 4, alignment: 4, type: FFIType.SINT32 }
const cif = ffi.prepareCall(intType, [intType, intType])

pnpm install
pnpm test      # Comprehensive vitest suite with real WASM
pnpm benchmark # Performance measurement

MIT License - Compatible with official libffi v3.5.2 licensing.

This WebAssembly port is part of a larger effort to bring professional desktop applications to browsers with native performance.

👨‍💻 About the Maintainer: Isaac Johnston (@superstructor) - Building foundational browser-native computing infrastructure through systematic C/C++ to WebAssembly porting.

📊 Impact: 70+ open source WASM libraries enabling professional applications like Blender, GIMP, and scientific computing tools to run natively in browsers.

🚀 Your Support Enables:

• Continued maintenance and updates
• Performance optimizations
• New library ports and integrations
• Documentation and tutorials
• Cross-browser compatibility testing

💖 Sponsor this work to help build the future of browser-native computing.