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WebAssembly in Action
book

WebAssembly in Action

by Gerard Gallant
November 2019
Intermediate to advanced
448 pages
15h 6m
English
Manning Publications
Audiobook available
Content preview from WebAssembly in Action

D.2. Chapter 4

Chapter 4 has two exercises.

D.2.1. Exercise 1

What two options are there to have Emscripten make your functions visible to the JavaScript code?

Solution

The two options are

  • Include the EMSCRIPTEN_KEEPALIVE declaration with the function.
  • Include the function names in the command line’s EXPORTED_FUNCTIONS array when compiling the module.

D.2.2. Exercise 2

How do you prevent function names from being mangled when compiled so that your JavaScript code can use the expected function name?

Solution

By using extern "C"

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