CREATING NATIVE EXTENSION CODES FOR NODE.js
Brushing up with basics
Let me explain in this way:
- Libuv as a C library supports us through providing asynchronous execution.
Tools integrated for creating native extensions
a) Binding.GYP File
This specific file demands us to specify the need to compile the native extension. The most important thing to be noticed here is that it is highly mandatory to give proper justification for the files that are compiled here and the final binary which is been called in the functionality. This one has a JSON like structure in it and the keys to get this highly configured by its sources and target as well.
This one is basically a tool that helps us to get compiled with the native extensions. This tool is implemented in Node.js which is been packaged with the npm, so we can just run npm, install it, and then compile it using our native extensions. While running the npm installation, it will help by detecting the binding.gyp file gets included in the root folder and starts to get compiled. Moreover, it allows us to release or debug builds. This will yield the result of binary files get combined with the specific .node extensions that will be created within the release or debug folder, based on the way it got configured.
Bindings are a node.js package that allows us to export the native extensions of node.js. It takes the charge of searching in a built or release folder for development purpose.
A C API that helps us to get interacted with the engine entirely in the abstract way. It’s almost an evolution kind of approach that tries its best to port its nodes in various architectures. This API provides high stability and greater compatibility between different node versions. It means that if the native extension is compiled to node 8.1, then there is no necessity to recompile it for the versions 8.6 and 9.3. This makes the job of maintainers and contributors much easier. As a leading website development company in Chennai, iStudio Technologies incorporates the most advanced frameworks in order to deliver the best website for your concern.
e) Node ADDON API
Taking advantage of the language used this particular module provides us the implementation of C++ for N-API.
Step1: Native Extension World
To start with the native extension world we can just use the example of a simple demo program here. There is no intention of overloading the code with extra logic in order to focus on the minimum necessary code.
Here we can start the implementation through initializing the npm where the dependency factors are installed:
Time to install our dependencies
npm i node-addon-api bindings
Parts of the file
The first argument is the native extension name and the second argument is the name of the function which initializes the extension.
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Other additional steps
- Nan (Native abstract for node.js)
Things existed before in N-API
It is very important to know about the context and history of native extensions as it will be very helpful to give access to a lot of documentation and examples as well. The basic motto is to replace the NAN with N-API, for that reason we need turn back and have a look at NAN. As a C++ library NAN delivers us v8 abstraction, but at the same time, it won’t allow to abstract ourselves the v8. While releasing NodeJS it tends to undergo v8 related changes which can even break the native extension. Usage if NAN is considered to be a remedy to avoid this problem.
As a developer if you want to know the working process and composition of NodeJS then it is essential to learn about native extensions here. It is a multi-usage pack which can be used in different scenarios like performance boost, C/C++ library integrations or legacy code integration. We at iStudio Technologies are the top web development company in Chennai, having a decade of experience and known as the best client servicing company in the industry.