synchronized method

stdlib/src/jet/runtime/Intrinsics.java

@@ -1,5 +1,7 @@
 package jet.runtime;
 
+import jet.Function0;
+
 import java.util.ArrayList;
 
 /**
@@ -29,6 +31,12 @@ public class Intrinsics {
         return (thisVal == anotherVal ? 0 : (anotherVal ? 1 : -1));
     }
 
+    public static <R> R stupidSync(Object lock, Function0<R> block) {
+        synchronized (lock) {
+            return block.invoke();
+        }
+    }
+
     private static Throwable sanitizeStackTrace(Throwable throwable) {
         StackTraceElement[] stackTrace = throwable.getStackTrace();
         ArrayList<StackTraceElement> list = new ArrayList<StackTraceElement>();