feat(core): new worker workspace engine (#9257)

packages/frontend/apps/ios/App/App/Mutex.swift

@@ -0,0 +1,23 @@
+//
+//  Mutex.swift
+//  App
+//
+//  Created by EYHN on 2025/1/11.
+//
+
+import Foundation
+
+final class Mutex<Wrapped>: @unchecked Sendable {
+  private let lock = NSLock.init()
+  private var wrapped: Wrapped
+  
+  init(_ wrapped: Wrapped) {
+    self.wrapped = wrapped
+  }
+  
+  func withLock<R>(_ body: @Sendable (inout Wrapped) throws -> R) rethrows -> R {
+    self.lock.lock()
+    defer { self.lock.unlock() }
+    return try body(&wrapped)
+  }
+}