1 files changed, 34 insertions, 0 deletions
diff --git a/src/lib/vendor/async-mutex/semaphoreinterface.ts b/src/lib/vendor/async-mutex/semaphoreinterface.ts
new file mode 100644
index 0000000..bbbdc6b
--- /dev/null
+++ b/src/lib/vendor/async-mutex/semaphoreinterface.ts
@@ -0,0 +1,34 @@
+export interface SemaphoreInterface {
+  acquire(
+    weight?: number,
+    priority?: number
+  ): Promise<[number, SemaphoreInterface.Releaser]>;
+
+  runExclusive<T>(
+    callback: SemaphoreInterface.Worker<T>,
+    weight?: number,
+    priority?: number
+  ): Promise<T>;
+
+  waitForUnlock(weight?: number, priority?: number): Promise<void>;
+
+  isLocked(): boolean;
+
+  getValue(): number;
+
+  setValue(value: number): void;
+
+  release(weight?: number): void;
+
+  cancel(): void;
+}
+
+export namespace SemaphoreInterface {
+  export interface Releaser {
+    (): void;
+  }
+
+  export interface Worker<T> {
+    (value: number): Promise<T> | T;
+  }
+}