hf-runner

hf-runner

Hermes and JSI demo of JSI Host Functions loaded dynamically from shared libraries specified on the command line.

hf-runner dynamically loads shared libraries specified on the command line after the input JS files, and calls them to register any native functions into the global object. Then it executes the input JS file, which can use the registered natives.

Usage

hf-runner <js-file> [<shared-lib> ...]

Example

hf-runner comes with two example libraries: libhfadd and libhfmyprint. The register the functions add and myprint respectively.

The provided file demo.js uses both of these functions.

$ hf-runner demo.js libhfadd.so libhfmyprint.so

Shared Library API

The shared libraries must export a function named registerNatives with the following signature:

void registerNatives(facebook::jsi::Runtime &rt);