001package votorola.g.util.concurrent; // Copyright 2007, Michael Allan. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Votorola Software"), to deal in the Votorola Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicence, and/or sell copies of the Votorola Software, and to permit persons to whom the Votorola Software is furnished to do so, subject to the following conditions: The preceding copyright notice and this permission notice shall be included in all copies or substantial portions of the Votorola Software. THE VOTOROLA SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE VOTOROLA SOFTWARE OR THE USE OR OTHER DEALINGS IN THE VOTOROLA SOFTWARE. 002 003import java.util.concurrent.*; 004 005 006/** An extended CountDownLatch, and CountDownLatch utilities. 007 */ 008public final class CountDownLatchX extends CountDownLatch 009{ 010 011 012 public CountDownLatchX( int count ) { super( count ); } 013 014 015 016 // ------------------------------------------------------------------------------------ 017 018 019 /** Same as {@linkplain Thread#join() join}(), but returns normally if interrupted. 020 * 021 * @return true if the wait ended normally; false if an InterruptedException occured 022 */ 023 public boolean tryAwait( long timeout, TimeUnit unit ) 024 { 025 return tryAwait( CountDownLatchX.this, timeout, unit ); 026 } 027 028 029 030 /** Same as {@linkplain CountDownLatch#await(long,TimeUnit) await}(), 031 * but returns normally if interrupted. 032 * Interrupt state (was it interrupted or not?) is lost. 033 * 034 * @return true if the count reached zero; false otherwise 035 */ 036 public static boolean tryAwait( CountDownLatch latch, long timeout, TimeUnit unit ) 037 { 038 try 039 { 040 return latch.await( timeout, unit ); 041 } 042 catch( InterruptedException x ) { return latch.getCount() == 0; } 043 } 044 045 046 047}