| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| using System; |
| using System.Threading; |
| |
| namespace ActiveMQ.Util |
| { |
| /// <summary> |
| /// An alternative implementation using the EventSemaphore class |
| /// <summary> |
| class CountDownLatch2 |
| { |
| readonly EventSemaphore mutex = new EventSemaphore(); |
| int remaining; |
| |
| public CountDownLatch2(int i) |
| { |
| remaining=i; |
| } |
| |
| public void countDown() |
| { |
| lock(mutex) |
| { |
| if( remaining > 0 ) |
| { |
| remaining--; |
| if( remaining <= 0 ) |
| { |
| mutex.PulseAll(); |
| } |
| } |
| } |
| } |
| |
| public int Remaining |
| { |
| get { |
| lock(mutex) |
| { |
| return remaining; |
| } |
| } |
| } |
| |
| /// <summary> |
| /// Waits forever for the latch to be completed |
| /// <summary> |
| public bool await() |
| { |
| lock (mutex) |
| { |
| TimeSpan elapsed = new TimeSpan(0, 0, 5); |
| while (remaining > 0) |
| { |
| mutex.Wait(elapsed); |
| } |
| } |
| return true; |
| } |
| |
| /// <summary> |
| /// Waits the specified amount of time for the latch |
| /// returning true if the latch was acquired |
| /// <summary> |
| public bool await(TimeSpan timeout) |
| { |
| DateTime end = DateTime.Now.Add(timeout); |
| lock (mutex) |
| { |
| while (remaining > 0) |
| { |
| TimeSpan elapsed = end.Subtract(DateTime.Now); |
| if (elapsed.Milliseconds < 0) { |
| break; |
| } |
| Console.WriteLine("About to wait on semaphore for: " + elapsed); |
| |
| mutex.Wait(elapsed); |
| } |
| return remaining > 0; |
| } |
| } |
| |
| |
| /// <summary> |
| /// Waits the specified amount of time for the latch |
| /// returning true if the latch was acquired |
| /// <summary> |
| public bool await(int millis) |
| { |
| long ticks = millis * (1000000 / 100); // 1,000,000 nanos in a millisecond |
| TimeSpan span = new TimeSpan(ticks); |
| return await(span); |
| } |
| } |
| } |