lingo3d/lib/pools/utils/createSharedPool.js

Lingo3D is a React/Vue 3d game development framework that ships with a complete visual editor

import { sharedPoolReleaseSystem } from "../../systems/configSystems/sharedPoolReleaseSystem";
export default (factory, dispose) => {
    const paramsInstanceMap = new Map();
    const paramsCountRecord = {};
    const objectParamStringMap = new WeakMap();
    const request = (params, paramString = JSON.stringify(params), context = undefined) => {
        if ((paramsCountRecord[paramString] =
            (paramsCountRecord[paramString] ?? 0) + 1) === 1) {
            const result = factory(params, context);
            objectParamStringMap.set(result, paramString);
            paramsInstanceMap.set(paramString, result);
            return result;
        }
        return paramsInstanceMap.get(paramString);
    };
    const release = (object) => object &&
        sharedPoolReleaseSystem.add(object, {
            objectParamStringMap,
            paramsCountRecord,
            dispose,
            paramsInstanceMap
        });
    return [request, release];
};
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