lingo3d/lib/pools/utils/createObjectPool.js

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

import { forceGetInstance } from "@lincode/utils";
export default (factory, dispose) => {
    const paramStringObjectArrayMap = new Map();
    const objectParamStringMap = new WeakMap();
    const releasedObjects = new WeakSet();
    let allObjects = [];
    const request = (params, paramString = JSON.stringify(params), context = undefined) => {
        const objectArray = forceGetInstance(paramStringObjectArrayMap, paramString, (Array));
        if (objectArray.length) {
            const object = objectArray.pop();
            releasedObjects.delete(object);
            return object;
        }
        const result = factory(params, context);
        objectParamStringMap.set(result, paramString);
        allObjects.push(result);
        return result;
    };
    const release = (object) => {
        if (!object || releasedObjects.has(object))
            return;
        releasedObjects.add(object);
        paramStringObjectArrayMap
            .get(objectParamStringMap.get(object))
            .push(object);
    };
    const clear = () => {
        if (dispose)
            for (const object of allObjects)
                dispose(object);
        paramStringObjectArrayMap.clear();
        allObjects = [];
    };
    return [request, release, clear];
};
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