Restore SEBPatch

SafeExamBrowser.Client/Contracts/ICoordinator.cs

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2024 ETH Zürich, IT Services
+ * 
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+namespace SafeExamBrowser.Client.Contracts
+{
+	/// <summary>
+	/// Coordinates concurrent operations of the client application.
+	/// </summary>
+	internal interface ICoordinator
+	{
+		/// <summary>
+		/// Indicates whether the reconfiguration lock is currently occupied.
+		/// </summary>
+		bool IsReconfigurationLocked();
+
+		/// <summary>
+		/// Indicates whether the session lock is currently occupied.
+		/// </summary>
+		bool IsSessionLocked();
+
+		/// <summary>
+		/// Releases the reconfiguration lock.
+		/// </summary>
+		void ReleaseReconfigurationLock();
+
+		/// <summary>
+		/// Releases the session lock.
+		/// </summary>
+		void ReleaseSessionLock();
+
+		/// <summary>
+		/// Attempts to acquire the unique reconfiguration lock. Returns <c>true</c> if successful, otherwise <c>false</c>.
+		/// </summary>
+		bool RequestReconfigurationLock();
+
+		/// <summary>
+		/// Attempts to acquire the unique session lock. Returns <c>true</c> if successful, otherwise <c>false</c>.
+		/// </summary>
+		bool RequestSessionLock();
+	}
+}