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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | 2x 2x 2x 13x 57x 30x 27x 27x 27x | import type {Code} from './types';
/**
* Executes only one instance of give code at a time. If other calls come in in
* parallel, they get resolved to the result of the ongoing execution.
*/
export const codeMutex = <T>() => {
let result: Promise<T> | undefined;
return async (code: Code<T>): Promise<T> => {
if (result) return result;
try {
return await (result = code());
} finally {
result = undefined;
}
};
};
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