test/jdk/java/nio/channels/Selector/WakeupNow.java
changeset 47216 71c04702a3d5
parent 7668 d4a77089c587
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/nio/channels/Selector/WakeupNow.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/* @test
+ * @bug 4940372
+ * @summary Ensure that the wakeup state is cleared by selectNow()
+ */
+
+import java.nio.channels.*;
+
+public class WakeupNow {
+
+    public static void main(String[] args) throws Exception {
+        test1();
+        test2();
+    }
+
+    // Test if selectNow clears wakeup with the wakeup fd and
+    // another fd in the selector.
+    // This fails before the fix on Linux
+    private static void test1() throws Exception {
+        Selector sel = Selector.open();
+        Pipe p = Pipe.open();
+        p.source().configureBlocking(false);
+        p.source().register(sel, SelectionKey.OP_READ);
+        sel.wakeup();
+        // ensure wakeup is consumed by selectNow
+        Thread.sleep(2000);
+        sel.selectNow();
+        long startTime = System.currentTimeMillis();
+        int n = sel.select(2000);
+        long endTime = System.currentTimeMillis();
+        p.source().close();
+        p.sink().close();
+        sel.close();
+        if (endTime - startTime < 1000)
+            throw new RuntimeException("test failed");
+    }
+
+    // Test if selectNow clears wakeup with only the wakeup fd
+    // in the selector.
+    // This fails before the fix on Solaris
+    private static void test2() throws Exception {
+        Selector sel = Selector.open();
+        Pipe p = Pipe.open();
+        p.source().configureBlocking(false);
+        sel.wakeup();
+        // ensure wakeup is consumed by selectNow
+        Thread.sleep(2000);
+        sel.selectNow();
+        long startTime = System.currentTimeMillis();
+        int n = sel.select(2000);
+        long endTime = System.currentTimeMillis();
+        sel.close();
+        if (endTime - startTime < 1000)
+            throw new RuntimeException("test failed");
+    }
+
+}