Merge pull request #11739 from neikeq/tengo-el-mono

Moved mono module here

1 files changed, 94 insertions, 0 deletions

diff --git a/modules/mono/glue/cs_files/GodotTaskScheduler.cs b/modules/mono/glue/cs_files/GodotTaskScheduler.cs
new file mode 100644
index 0000000000..f587645a49
--- /dev/null
+++ b/modules/mono/glue/cs_files/GodotTaskScheduler.cs
@@ -0,0 +1,94 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Godot
+{
+	public class GodotTaskScheduler : TaskScheduler
+	{
+		private GodotSynchronizationContext Context { get; set; }
+		private readonly LinkedList<Task> _tasks = new LinkedList<Task>();
+
+		public GodotTaskScheduler()
+		{
+			Context = new GodotSynchronizationContext();
+		}
+
+		protected sealed override void QueueTask(Task task)
+		{
+			lock (_tasks)
+			{
+				_tasks.AddLast(task);
+			}
+		}
+
+		protected sealed override bool TryExecuteTaskInline(Task task, bool taskWasPreviouslyQueued)
+		{
+			if (SynchronizationContext.Current != Context)
+			{
+				return false;
+			}
+
+			if (taskWasPreviouslyQueued)
+			{
+				TryDequeue(task);
+			}
+
+			return base.TryExecuteTask(task);
+		}
+
+		protected sealed override bool TryDequeue(Task task)
+		{
+			lock (_tasks)
+			{
+				return _tasks.Remove(task);
+			}
+		}
+
+		protected sealed override IEnumerable<Task> GetScheduledTasks()
+		{
+			lock (_tasks)
+			{
+				return _tasks.ToArray();
+			}
+		}
+
+		public void Activate()
+		{
+			SynchronizationContext.SetSynchronizationContext(Context);
+			ExecuteQueuedTasks();
+			Context.ExecutePendingContinuations();
+		}
+
+		private void ExecuteQueuedTasks()
+		{
+			while (true)
+			{
+				Task task;
+
+				lock (_tasks)
+				{
+					if (_tasks.Any())
+					{
+						task = _tasks.First.Value;
+						_tasks.RemoveFirst();
+					}
+					else
+					{
+						break;
+					}
+				}
+
+				if (task != null)
+				{
+					if (!TryExecuteTask(task))
+					{
+						throw new InvalidOperationException();
+					}
+				}
+			}
+		}
+	}
+}