extensions: Add NSLock.withLock for Linux

Author: Terky

Sources/Extensions/NSLock+.swift

@@ -0,0 +1,12 @@
+#if os(Linux)
+import Foundation
+
+extension NSLock {
+
+    func withLock<R>(_ body: () throws -> R) rethrows -> R {
+        lock()
+        defer { unlock() }
+        return try body()
+    }
+}
+#endif