26 lines
978 B
JavaScript
26 lines
978 B
JavaScript
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import { operate } from '../util/lift';
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import { createOperatorSubscriber } from './OperatorSubscriber';
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export function refCount() {
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return operate((source, subscriber) => {
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let connection = null;
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source._refCount++;
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const refCounter = createOperatorSubscriber(subscriber, undefined, undefined, undefined, () => {
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if (!source || source._refCount <= 0 || 0 < --source._refCount) {
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connection = null;
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return;
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}
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const sharedConnection = source._connection;
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const conn = connection;
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connection = null;
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if (sharedConnection && (!conn || sharedConnection === conn)) {
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sharedConnection.unsubscribe();
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}
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subscriber.unsubscribe();
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});
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source.subscribe(refCounter);
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if (!refCounter.closed) {
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connection = source.connect();
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}
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});
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}
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//# sourceMappingURL=refCount.js.map
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