33 lines
628 B
JavaScript
33 lines
628 B
JavaScript
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/**
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* Creates a mutual exclude function with the following property:
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*
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* @example
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* const mutex = createMutex()
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* mutex(function () {
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* // This function is immediately executed
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* mutex(function () {
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* // This function is never executed, as it is called with the same
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* // mutex function
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* })
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* })
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*
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* @return {Function} A mutual exclude function
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* @public
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*/
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export const createMutex = () => {
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let token = true
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return (f, g) => {
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if (token) {
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token = false
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try {
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f()
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} finally {
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token = true
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}
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} else if (g !== undefined) {
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g()
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}
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}
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}
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