Write/Read lock fix.

Author: Chriztiaan

.changeset/rotten-rats-raise.md

@@ -0,0 +1,5 @@
+---
+'@powersync/react-native': patch
+---
+
+Fixed an issue where the read and write locks were executing mutually exclusively. A read conccurent with a write or another read should correctly proceed instead of being blocked until the other lock has released.

packages/react-native/src/db/PowerSyncDatabase.ts

@@ -58,4 +58,14 @@ export class PowerSyncDatabase extends AbstractPowerSyncDatabase {
       identifier: this.database.name
     });
   }
+
+  async readLock<T>(callback: (db: DBAdapter) => Promise<T>): Promise<T> {
+    await this.waitForReady();
+    return this.database.readLock(callback);
+  }
+
+  async writeLock<T>(callback: (db: DBAdapter) => Promise<T>): Promise<T> {
+    await this.waitForReady();
+    return this.database.writeLock(callback);
+  }
 }