test/lib/testlibrary/jdk/testlibrary/Utils.java

rev 13311 : 8193879: Java debugger hangs on method invocation
Reviewed-by: sspitsyn
rev 13428 : jfr backport

*** 40,49 ****
--- 40,50 ----
  import java.util.Collections;
  import java.util.Objects;
  import java.util.regex.Pattern;
  import java.util.regex.Matcher;
  import java.util.concurrent.TimeUnit;
+ import java.util.function.BooleanSupplier;
  import java.util.function.Function;
  
  /**
   * Common library for various test helper functions.
   */
*** 409,414 ****
--- 410,461 ----
              out.write(buffer, 0, read);
              transferred += read;
          }
          return transferred;
      }
+ 
+     /**
+      * 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();
+     }
  }