Dactyloidae iOS initial commit

mobile/ios/Shared/AssertionUtils.swift

@@ -0,0 +1,14 @@
+/* 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/. */
+
+import Foundation
+
+/**
+ Assertion for checking that the call is being made on the main thread.
+
+ - parameter message: Message to display in case of assertion.
+ */
+public func assertIsMainThread(_ message: String) {
+    assert(Thread.isMainThread, message)
+}