November 2019
Intermediate to advanced
448 pages
15h 6m
English
Content preview from WebAssembly in ActionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 6. Creating a WebAssembly module that talks to JavaScript using function pointers
This chapter covers
- Adjusting C or C++ code to work with function pointers
- Using Emscripten’s helper functions to pass JavaScript functions to the WebAssembly module
- Calling function pointers in the WebAssembly module when not using Emscripten’s plumbing code
In chapter 5, you modified your module so that it was no longer passing a validation error message back to the JavaScript through a parameter. Instead, you modified the module so that it called a JavaScript function directly, as figure 6.1 illustrates.
Figure 6.1. The module calling a function in the JavaScript code
Imagine being able to pass a JavaScript function to the module based on your ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.