November 2019
Intermediate to advanced
448 pages
15h 6m
English
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B.2. cwrap
The cwrap function is similar to the ccall function. With the cwrap function, you only specify the first three parameters, which are identical to those of ccall:
- The function name
- The function’s return type
- An array indicating the function’s parameter types
Unlike with ccall, which executes the function right away, when you call the cwrap function, you’re given a JavaScript function. In JavaScript, functions are first-class citizens and can be passed around like you would a variable, which is one of JavaScript’s most powerful features. The JavaScript function can then be used to call the module’s function, similar to how you’d call a normal function in which you specify the parameter values directly rather than using an array. ...
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