tav-media/lib/libpag/src/utils/queue.js

Cross platform media editing framework

var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
export class WebAssemblyQueue {
    constructor() {
        this.executing = false;
        this.queue = [];
    }
    exec(fn, scope, ...args) {
        return new Promise((resolve, reject) => {
            const copyFn = () => __awaiter(this, void 0, void 0, function* () {
                if (!fn) {
                    reject(new Error('Function is null!'));
                    return;
                }
                try {
                    const res = yield fn.call(scope, ...args);
                    resolve(res);
                }
                catch (e) {
                    reject(e);
                }
            });
            this.queue.push({
                fn: copyFn,
            });
            if (this.executing)
                return;
            this.execNextTask();
        });
    }
    execNextTask() {
        if (this.queue.length < 1) {
            this.executing = false;
            return;
        }
        this.executing = true;
        const task = this.queue.shift();
        task.fn().then(() => {
            this.execNextTask();
        });
    }
}