sqlocal/dist/lib/create-mutex.js

SQLocal makes it easy to run SQLite3 in the browser, backed by the origin private file system.

export function createMutex() {
    let promise;
    let resolve;
    const lock = async () => {
        while (promise) {
            await promise;
        }
        promise = new Promise((res) => {
            resolve = res;
        });
    };
    const unlock = async () => {
        const res = resolve;
        promise = undefined;
        resolve = undefined;
        res?.();
    };
    return { lock, unlock };
}
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