Add ownsLock / ownsSharedLock properties

src/types/basicLockable.d.ts

@@ -4,7 +4,12 @@
  */
 export interface BasicLockable {
   /**
-   * Blocks until a lock can be acquired for the current agent.
+   * Indicates whether the current agent owns the lock.
+   */
+  ownsLock: readonly boolean;
+
+  /**
+   * Blocks until the lock can be acquired for the current agent.
    * If an exception is thrown, no lock is acquired.
    */
   lock(): Promise<void>;

src/types/sharedLockable.d.ts

@@ -2,6 +2,11 @@
  * Provides shared blocking semantics for agents (i.e. main thread, workers).
  */
 export interface SharedLockable {
+  /**
+   * Indicates whether the current agent owns a shared lock.
+   */
+  ownsSharedLock: readonly boolean;
+
   /**
    * Blocks until a shared lock can be acquired for the current
    * agent. If an exception is thrown, no lock is acquired.