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denoland-deno/ext/ffi/00_ffi.js

33 lines
855 B
JavaScript

// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
"use strict";
((window) => {
const core = window.Deno.core;
const __bootstrap = window.__bootstrap;
class DynamicLibrary {
#rid;
symbols = {};
constructor(path, symbols) {
this.#rid = core.opSync("op_ffi_load", { path, symbols });
for (const symbol in symbols) {
this.symbols[symbol] = (...parameters) =>
core.opSync("op_ffi_call", { rid: this.#rid, symbol, parameters });
}
}
close() {
core.close(this.#rid);
}
}
function dlopen(path, symbols) {
// URL support is progressively enhanced by util in `runtime/js`.
const pathFromURL = __bootstrap.util.pathFromURL ?? ((p) => p);
return new DynamicLibrary(pathFromURL(path), symbols);
}
window.__bootstrap.ffi = { dlopen };
})(this);