55 lines
1.0 KiB
JavaScript
55 lines
1.0 KiB
JavaScript
'use strict';
|
|
|
|
/**
|
|
* Mutual exclude for JavaScript.
|
|
*
|
|
* @module mutex
|
|
*/
|
|
|
|
/**
|
|
* @callback mutex
|
|
* @param {function():void} cb Only executed when this mutex is not in the current stack
|
|
* @param {function():void} [elseCb] Executed when this mutex is in the current stack
|
|
*/
|
|
|
|
/**
|
|
* Creates a mutual exclude function with the following property:
|
|
*
|
|
* ```js
|
|
* const mutex = createMutex()
|
|
* mutex(() => {
|
|
* // This function is immediately executed
|
|
* mutex(() => {
|
|
* // This function is not executed, as the mutex is already active.
|
|
* })
|
|
* })
|
|
* ```
|
|
*
|
|
* @return {mutex} A mutual exclude function
|
|
* @public
|
|
*/
|
|
const createMutex = () => {
|
|
let token = true;
|
|
return (f, g) => {
|
|
if (token) {
|
|
token = false;
|
|
try {
|
|
f();
|
|
} finally {
|
|
token = true;
|
|
}
|
|
} else if (g !== undefined) {
|
|
g();
|
|
}
|
|
}
|
|
};
|
|
|
|
var mutex = /*#__PURE__*/Object.freeze({
|
|
__proto__: null,
|
|
createMutex: createMutex
|
|
});
|
|
|
|
exports.createMutex = createMutex;
|
|
exports.mutex = mutex;
|
|
//# sourceMappingURL=mutex-63f09c81.cjs.map
|