File size: 895 Bytes
c120a1c |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 |
/**
* A simple mutex class to prevent concurrent updates.
*/
export class SimpleMutex {
/**
* @type {boolean}
*/
isBusy = false;
/**
* @type {Function}
*/
callback = () => {};
/**
* Constructs a SimpleMutex.
* @param {Function} callback Callback function.
*/
constructor(callback) {
this.isBusy = false;
this.callback = callback;
}
/**
* Updates the mutex by calling the callback if not busy.
* @param {...any} args Callback args
* @returns {Promise<void>}
*/
async update(...args) {
// Don't touch me I'm busy...
if (this.isBusy) {
return;
}
// I'm free. Let's update!
try {
this.isBusy = true;
await this.callback(...args);
}
finally {
this.isBusy = false;
}
}
}
|