synchronized method

2011-12-19 10:21:17 +02:00
parent 9a7d947899
commit 1e471aa9c4
7 changed files with 78 additions and 1 deletions
@@ -0,0 +1,33 @@
+import java.util.concurrent.*
+import java.util.concurrent.atomic.*
+
+fun thread(block: fun():Unit ) {
+    val thread = object: Thread() {
+        override fun run() {
+            block()
+        }
+    }
+    thread.start()
+}
+
+fun box() : String {
+   val ref = AtomicInteger()
+   val cdl = CountDownLatch(11)
+   for(i in 0..10) {
+       thread {
+          var current = 0
+          do {
+              current = ref.synchronized {
+                val v = ref.get() + 1
+                if(v < 100)
+                    ref.set(v+1)
+                v
+              }
+          }
+          while(current < 100)
+          cdl.countDown()
+       }
+   }
+   cdl.await()
+   return if(ref.get() == 100) "OK" else ref.get().toString()
+}