/*
 * Copyright 2014 - 2015 Real Logic Ltd.
 *
 * Licensed 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.
 */
package org.agrona.concurrent;

import sun.misc.Signal;

import java.util.concurrent.locks.LockSupport;

/**
 * One time barrier for blocking a thread until a SIGINT signal is received from the operating system.
 */
public class SigIntBarrier
{
    private final Thread thread;
    private volatile boolean running = true;

    /**
     * Construct and register the barrier ready for use.
     */
    public SigIntBarrier()
    {
        thread = Thread.currentThread();

        Signal.handle(
            new Signal("INT"),
            (signal) ->
            {
                running = false;
                LockSupport.unpark(thread);
            });
    }

    /**
     * Await the reception of the SIGINT signal.
     */
    public void await()
    {
        while (running)
        {
            LockSupport.park();
        }
    }
}


@@ -684,25 +684,22 @@
 ent.
-locks.LockSupport
+CountDownLatch
 ;%0A%0A/
@@ -736,16 +736,23 @@
 cking a 
+single 
 thread u
@@ -866,66 +866,52 @@
 nal 
-Thread thread;%0A    private volatile boolean running = true
+CountDownLatch latch = new CountDownLatch(1)
 ;%0A%0A 
@@ -1019,50 +1019,8 @@
   %7B%0A
-        thread = Thread.currentThread();%0A%0A
     
@@ -1037,29 +1037,16 @@
 .handle(
-%0A            
 new Sign
@@ -1059,136 +1059,145 @@
 T%22),
-%0A            (signal) -%3E%0A    
+ (signal) -%3E signal());%0A
     
+%7D%0A%0A
     
-%7B
+/**
 %0A     
-           running = false;%0A                LockSupport.unpark(thread);
+* Programmatically signal an awaiting thread.%0A     */%0A    public void signal()
 %0A    
+%7B%0A
         
 %7D);%0A
@@ -1192,17 +1192,32 @@
         
-%7D
+latch.countDown(
 );%0A    %7D
@@ -1325,62 +1325,163 @@
     
-while (running)%0A        %7B%0A            LockSupport.park
+try%0A        %7B%0A            latch.await();%0A        %7D%0A        catch (final InterruptedException ignore)%0A        %7B%0A            Thread.currentThread().interrupt
 ();%0A

Allow SigIntBarrier to be programmatically signaled and created from any thread. Issue #82.