test/testlibrary/com/oracle/java/testlibrary/Utils.java

rev 8910 : full patch for jfr

*** 1,7 ****
  /*
!  * Copyright (c) 2013, 2018, 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.
--- 1,7 ----
  /*
!  * Copyright (c) 2013, 2019, 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.
*** 36,45 ****
--- 36,47 ----
  import java.util.List;
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.regex.Pattern;
  import java.util.regex.Matcher;
+ import java.util.function.BooleanSupplier;
+ import java.util.function.Function;
  import java.lang.reflect.Field;
  import sun.misc.Unsafe;
  
  /**
   * Common library for various test helper functions.
*** 368,373 ****
--- 370,421 ----
              hexView[i++] = hexArray[b & 0x0F];
              hexView[i++] = ' ';
          }
          return new String(hexView);
      }
+ 
+     /**
+      * Wait for condition to be true
+      *
+      * @param condition, a condition to wait for
+      */
+     public static final void waitForCondition(BooleanSupplier condition) {
+         waitForCondition(condition, -1L, 100L);
+     }
+ 
+     /**
+      * Wait until timeout for condition to be true
+      *
+      * @param condition, a condition to wait for
+      * @param timeout a time in milliseconds to wait for condition to be true
+      * specifying -1 will wait forever
+      * @return condition value, to determine if wait was successful
+      */
+     public static final boolean waitForCondition(BooleanSupplier condition,
+             long timeout) {
+         return waitForCondition(condition, timeout, 100L);
+     }
+ 
+     /**
+      * Wait until timeout for condition to be true for specified time
+      *
+      * @param condition, a condition to wait for
+      * @param timeout a time in milliseconds to wait for condition to be true,
+      * specifying -1 will wait forever
+      * @param sleepTime a time to sleep value in milliseconds
+      * @return condition value, to determine if wait was successful
+      */
+     public static final boolean waitForCondition(BooleanSupplier condition,
+             long timeout, long sleepTime) {
+         long startTime = System.currentTimeMillis();
+         while (!(condition.getAsBoolean() || (timeout != -1L
+                 && ((System.currentTimeMillis() - startTime) > timeout)))) {
+             try {
+                 Thread.sleep(sleepTime);
+             } catch (InterruptedException e) {
+                 Thread.currentThread().interrupt();
+                 throw new Error(e);
+             }
+         }
+         return condition.getAsBoolean();
+     }
  }