1 files changed, 26 insertions, 0 deletions
diff --git a/src/lib/vendor/async-mutex/interface.ts b/src/lib/vendor/async-mutex/interface.ts
new file mode 100644
index 0000000..736b338
--- /dev/null
+++ b/src/lib/vendor/async-mutex/interface.ts
@@ -0,0 +1,26 @@
+export interface MutexInterface {
+  acquire(priority?: number): Promise<MutexInterface.Releaser>;
+
+  runExclusive<T>(
+    callback: MutexInterface.Worker<T>,
+    priority?: number
+  ): Promise<T>;
+
+  waitForUnlock(priority?: number): Promise<void>;
+
+  isLocked(): boolean;
+
+  release(): void;
+
+  cancel(): void;
+}
+
+export namespace MutexInterface {
+  export interface Releaser {
+    (): void;
+  }
+
+  export interface Worker<T> {
+    (): Promise<T> | T;
+  }
+}