node-ffi/node-ffi
Node Ffi
node-ffi is a foreign function interface library for Node.js that enables calling functions from native C dynamic libraries without writing manual C++ bindings. It serves as a system for loading shared objects and DLLs into process memory, translating JavaScript values into binary representations, and executing external binaries at runtime.
The project utilizes a wrapper around the libffi library to construct call frames and execute native functions with dynamic arguments. It distinguishes itself by providing a native memory manager for allocating raw pointers and a mapping system that connects complex C structures to JavaScript objects.
The toolkit covers a broad range of native interoperability capabilities, including automatic data type translation and the creation of executable memory stubs that allow native libraries to trigger JavaScript callbacks. To maintain main-thread responsiveness, it supports an asynchronous execution model that offloads native function calls to a separate thread pool.
Features
- Dynamic Library Function Executions - Provides the core ability to load external shared objects and execute native C functions directly from JavaScript.
- Foreign Function Interfaces - Provides a comprehensive interface and binding layer for seamless communication between JavaScript and native libraries.
- Memory-Mapped Data Structures - Connects complex C data structures to JavaScript objects for efficient reading and writing of structured memory blocks.
- C-to-JavaScript Type Mappings - Provides systems for converting data types specifically between C and JavaScript for memory-compatible function calls.
- C Struct Mappings - Maps complex C structures and memory blocks into JavaScript objects for reading and writing structured memory.
- Dynamic Library Loading - Loads external shared objects or DLLs into the process memory space at runtime via system call interfaces.
- Raw Memory Allocation - Provides a low-level interface for allocating raw contiguous memory buffers and manipulating C-style pointers.
- Foreign Function Interface Calls - Executes functions from shared libraries by mapping JavaScript types to native C equivalents using libffi.
- Function-Pointer Callbacks - Creates executable memory stubs that map JavaScript functions as C-style function pointers for native library callbacks.
- Native C-JavaScript Bridges - Provides an interface designed for data exchange and function calls between native C/C++ code and JavaScript.
- Native Library Wrappers - Wraps the libffi library to construct native call frames and execute functions with dynamic arguments.
- Node.js Foreign Function Interfaces - A library for calling functions from native C dynamic libraries directly within Node.js without writing manual C++ bindings.
- Pointer-Based Memory Access - Implements direct manipulation and extraction of data from raw pointers to handle C structs across the language boundary.
- Native Library Integration - Allows calling functions from external C or C++ dynamic libraries directly within Node.js without manual glue code.
- Dynamic Library Loaders - Loads shared objects and DLLs into process memory to execute external binaries at runtime.
- Native Callbacks - Maps JavaScript functions to C-style function pointers, allowing native libraries to trigger logic within the runtime.
- Asynchronous Native Calls - Offloads native function execution to a separate thread pool to prevent blocking the Node.js main event loop.
- Native Callback Stubs - Creates function pointers in memory that allow native libraries to trigger JavaScript callbacks.
- Worker Thread Patterns - Offloads native function calls to a separate thread pool to prevent blocking the JavaScript main event loop.
