protected internal virtual void ExecuteInternal(Dictionary <UndoableTaskBase <T>, T> taskDictionary, TaskMode taskMode)
{
if (this.Parallel)
{
CompositeUndoableTask <T> .ExecuteInParallel(taskDictionary, taskMode);
}
else
{
CompositeUndoableTask <T> .ExecuteSequentially(taskDictionary, taskMode);
}
}
protected internal virtual void UndoInternal(Dictionary <UndoableTaskBase <T>, T> taskDictionary)
{
if (this.Parallel)
{
CompositeUndoableTask <T> .UndoInParallel(taskDictionary);
}
else
{
CompositeUndoableTask <T> .UndoSequentially(taskDictionary);
}
}
private static void ExecuteInParallel(Dictionary <UndoableTaskBase <T>, T> taskDictionary, TaskMode taskMode)
{
List <UndoableTaskBase <T> > performedTasks = new List <UndoableTaskBase <T> >();
object performedTasksLock = new object();
List <Exception> exceptions = new List <Exception>();
object exceptionsLock = new object();
Dictionary <KeyValuePair <UndoableTaskBase <T>, T>, AutoResetEvent> dictionary = taskDictionary.ToDictionary((KeyValuePair <UndoableTaskBase <T>, T> x) => x, (KeyValuePair <UndoableTaskBase <T>, T> x) => new AutoResetEvent(false));
foreach (KeyValuePair <UndoableTaskBase <T>, T> current in taskDictionary)
{
AutoResetEvent autoResetEvent = dictionary[current];
IInternalTask task = current.Key;
UndoableTaskBase <T> undoableTask = current.Key;
T arg = current.Value;
ThreadPool.QueueUserWorkItem(delegate(object param0)
{
try
{
task.PerformTask(arg, taskMode);
lock (performedTasksLock)
{
performedTasks.Add(undoableTask);
}
}
catch (Exception item)
{
lock (exceptionsLock)
{
exceptions.Add(item);
}
}
autoResetEvent.Set();
});
}
foreach (AutoResetEvent current2 in dictionary.Values)
{
current2.WaitOne();
}
if (exceptions.Count > 0)
{
CompositeUndoableTask <T> .SafelyUndoTasks(performedTasks.Cast <IUndoableTask>());
throw new CompositeException("Unable to undo tasks", exceptions);
}
}
private static void ExecuteSequentially(Dictionary <UndoableTaskBase <T>, T> taskDictionary, TaskMode taskMode)
{
List <UndoableTaskBase <T> > list = new List <UndoableTaskBase <T> >();
foreach (KeyValuePair <UndoableTaskBase <T>, T> current in taskDictionary)
{
IInternalTask key = current.Key;
try
{
key.PerformTask(current.Value, taskMode);
list.Add(current.Key);
}
catch (Exception)
{
CompositeUndoableTask <T> .SafelyUndoTasks(list.Cast <IUndoableTask>());
throw;
}
}
}
