koffi

Overview

Koffi is a fast and easy-to-use C FFI module for Node.js, featuring:

• Low-overhead and fast performance (see benchmarks)
• Support for primitive and aggregate data types (structs and fixed-size arrays), both by reference (pointer) and by value
• Javascript functions can be used as C callbacks (since 1.2.0)
• Well-tested code base for popular OS/architecture combinations

The following combinations of OS and architectures are officially supported and tested at the moment:

ISA / OS	Windows	Linux	macOS	FreeBSD	OpenBSD
x86 (IA32) 1	✅ Yes	✅ Yes	⬜️ N/A	✅ Yes	✅ Yes
x86_64 (AMD64)	✅ Yes	✅ Yes	✅ Yes	✅ Yes	✅ Yes
ARM32 LE 2	⬜️ N/A	✅ Yes	⬜️ N/A	🟨 Probably	🟨 Probably
ARM64 (AArch64) LE	✅ Yes	✅ Yes	✅ Yes	✅ Yes	🟨 Probably
RISC-V 64 3	⬜️ N/A	✅ Yes	⬜️ N/A	🟨 Probably	🟨 Probably

Go to the web site for more information: https://koffi.dev/

License

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

Find more information here: https://www.gnu.org/licenses/

1. The following call conventions are supported: cdecl, stdcall, MS fastcall, thiscall. ↩

2. The prebuilt binary uses the hard float ABI and expects a VFP coprocessor. Build from source to use Koffi with a different ABI (softfp, soft). ↩

3. The prebuilt binary uses the LP64D (double-precision float) ABI. The LP64 ABI is supported in theory if you build Koffi from source (untested), the LP64F ABI is not supported. ↩