/**
* Stops all threads created by <I>all</I> <TT>CSPParallel</TT> and {@link ProcessManager} objects. No new threads can be
* created until the <TT>resetDestroy</TT> method gets called.
*/
public static void destroy()
{
lock (allParThreads)
{
if (!destroyCalled)
{
Console.WriteLine("*** jcsp.lang.CSPParallel: stopping " +
allParThreads.Count + " threads");
//allParThreads.Size() + " threads");
for (var i = allParThreads.GetEnumerator(); i.MoveNext();)
{
/*final*/
ParThread t = i.Current.Value;
try
{
t.Interrupt();
}
catch (SecurityException e)
{
Console.WriteLine("*** jcsp.lang.CSPParallel: couldn't stop thread " +
t + " - security exception");
}
}
destroyCalled = true;
}
}
}
/**
* Removes the thread object from the <code>allParThreads</code> collection.
*/
public static void removeFromAllParThreads(/*final*/ ParThread oldThread)
{
lock (allParThreads)
{
allParThreads.TryRemove(_byte, out oldThread);
}
}
/**
* Adds the thread object to the <code>allParThreads</code> collection. This should be called by any infrastructure threads when they start.
*
* @param newThread the thread to be added to the collection.
*/
public static void addToAllParThreads(/*final*/ ParThread newThread) //throws InterruptedException
{
try
{
lock (allParThreads)
{
if (destroyCalled)
{
throw new ThreadInterruptedException("CSPParallel.destroy() has been called");
}
//allParThreads.add(newThread);
allParThreads.TryAdd(_byte, newThread);
}
}
catch (ThreadInterruptedException ex)
{
Console.WriteLine("Thread interrupted " + ex);
}
}
/**
* Run the parallel composition of the processes registered with this
* <TT>CSPParallel</TT> object. It terminates when, and only when, all its component
* processes terminate.
* </P>
* <P><I>Implementation note: In its first </I>run<I>, only
* (numProcesses - 1) Threads are created to run the processes --
* the last process is executed in the invoking Thread.
* Sunsequent </I>run<I>s reuse these Threads (so the overhead
* of thread creation happens only once).</I></P>
*/
public void run()
{
if (nProcesses > 0)
{
IamCSProcess myProcess;
//int currentPriority = 0;
ThreadPriority currentPriority = 0;
int maxPriority = 0;
if (priority)
{
Thread thread = Thread.CurrentThread;
currentPriority = thread.Priority;
maxPriority =
Math.Min(
(byte)currentPriority + nProcesses - 1,
Math.Min((byte)ThreadPriority.Highest,
//thread.getThreadGroup().getMaxPriority())
(byte)thread.Priority)
);
}
lock (sync)
{
//Debug.WriteLine("Resettin g barrier in CSPParallel" , "KAROL");
barrier.reset(nProcesses);
myProcess = processes[nProcesses - 1];
if (processesChanged)
{
if (nThreads < nProcesses - 1)
{
if (parThreads.Length < nProcesses - 1)
{
/*final*/ ParThread[] tmp = parThreads;
parThreads = new ParThread[processes.Length];
Array.Copy(tmp, 0, parThreads, 0, nThreads);
}
for (int i = 0; i < nThreads; i++)
{
//Debug.WriteLine("Resetting processes and barrier in CSPParallel", "KAROL");
parThreads[i].reset(processes[i], barrier);
if (priority)
{
//parThreads[i].SetPriority(Math.max(
// currentPriority, maxPriority - i));
parThreads[i].SetPriority(Math.Max((byte)currentPriority, maxPriority - i));
}
parThreads[i].release();
}
for (int i = nThreads; i < nProcesses - 1; i++)
{
//Debug.WriteLine("Creating thread and barrier in CSPParallel", "KAROL");
parThreads[i] = new ParThread(processes[i], barrier);
if (priority)
{
parThreads[i].SetPriority(Math.Max(
(byte)currentPriority, maxPriority - i));
}
parThreads[i].Start();
}
nThreads = nProcesses - 1;
}
else
{
for (int i = 0; i < nProcesses - 1; i++)
{
//Debug.WriteLine("Resetting processes and barrier in CSPParallel", "KAROL");
parThreads[i].reset(processes[i], barrier);
if (priority)
{
parThreads[i].SetPriority(Math.Max(
(byte)currentPriority, maxPriority - i));
}
parThreads[i].release();
}
}
processesChanged = false;
}
else
{
for (int i = 0; i < nProcesses - 1; i++)
{
if (priority)
{
parThreads[i].SetPriority(Math.Max((byte)currentPriority,
maxPriority - i));
}
parThreads[i].release();
}
}
}
try
{
myProcess.run();
}
catch (ProcessInterruptedException e)
{
// If this was raised then we must propagate the interrupt signal to other processes
lock (sync)
{
for (int i = 0; i < nThreads; i++)
{
try
{
parThreads[i].Interrupt();
}
catch (Exception t)
{
Console.WriteLine(
"*** jcsp.lang.Parallel: couldn't stop thread "
+ t
+ " - security exception");
}
}
}
}
catch (Exception e)
{
uncaughtException("jcsp.lang.Parallel", e);
}
//Debug.WriteLine("Synchronizing barrier in CSPParallel","KAROL");
barrier.sync();
}
}
/**
* @param <TT>process</TT> the {@link IamCSProcess} to be executed by this ProcessManager
*/
public ProcessManager(IamCSProcess process)
{
this.process = process;
thread = new ParThread(this.process, new CSPBarrier());
}
