27 lines
1.0 KiB
JavaScript
27 lines
1.0 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.concurrency = void 0;
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const tslib_1 = require("tslib");
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const concurrency_1 = require("./concurrency");
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const instances = new WeakMap();
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/**
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* A class method decorator that limits the concurrency of the method to the
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* given number of parallel executions. All invocations are queued and executed
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* in the order they were called.
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*/
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function concurrency(limit) {
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return (fn, context) => {
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return function (...args) {
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return tslib_1.__awaiter(this, void 0, void 0, function* () {
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let map = instances.get(this);
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if (!map)
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instances.set(this, (map = new WeakMap()));
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if (!map.has(fn))
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map.set(fn, (0, concurrency_1.concurrency)(limit));
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return map.get(fn)(() => tslib_1.__awaiter(this, void 0, void 0, function* () { return yield fn.call(this, ...args); }));
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});
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};
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};
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}
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exports.concurrency = concurrency;
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