a really simple mutex
jsr.io/@mary/mutex
typescript
jsr
initial commit
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.vscode/settings.json
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.vscode/settings.json
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.zed/settings.json
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.zed/settings.json
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{
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"lsp": {
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"deno": {
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"settings": {
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"deno": {
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"enable": true
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}
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}
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}
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},
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"languages": {
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"JavaScript": {
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"language_servers": [
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"deno",
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"!typescript-language-server",
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"!vtsls",
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"!eslint"
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],
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"formatter": "language_server"
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},
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"TypeScript": {
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"language_servers": [
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"deno",
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"!typescript-language-server",
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"!vtsls",
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"!eslint"
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],
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"formatter": "language_server"
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},
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"TSX": {
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"language_servers": [
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"deno",
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"!typescript-language-server",
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"!vtsls",
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"!eslint"
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],
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"formatter": "language_server"
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}
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}
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}
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LICENSE
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LICENSE
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BSD Zero Clause License
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Copyright (c) 2025 Mary
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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PERFORMANCE OF THIS SOFTWARE.
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README.md
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README.md
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deno.json
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deno.json
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{
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"name": "@mary/mutex",
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"version": "0.1.0",
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"license": "0BSD",
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"exports": {
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".": "./lib/mod.ts"
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},
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"fmt": {
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"useTabs": true,
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"indentWidth": 2,
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"lineWidth": 110,
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"semiColons": true,
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"singleQuote": true
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},
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"publish": {
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"include": ["lib/", "LICENSE", "README.md", "deno.json"]
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}
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}
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lib/mod.ts
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lib/mod.ts
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export interface Lock extends Disposable {
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dispose(): void;
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}
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class Mutex {
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#promise = Promise.resolve();
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async acquire(): Promise<Lock> {
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const { promise, resolve } = Promise.withResolvers<void>();
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const previous = this.#promise;
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this.#promise = promise;
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await previous;
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return { [Symbol.dispose]: resolve, dispose: resolve };
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}
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}
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export default Mutex;