Add ISequentialTaskWaiter, ISequentialHandlerWaiter.

Author: tosh-coding

src/AsyncFiberWorks/Procedures/ISequentialHandlerWaiter.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Threading.Tasks;
+
+namespace AsyncFiberWorks.Procedures
+{
+    /// <summary>
+    /// Use "await" to simply wait for the start of a task on a sequential handler list.
+    /// </summary>
+    /// <typeparam name="T"></typeparam>
+    public interface ISequentialHandlerWaiter<T>
+    {
+        /// <summary>
+        /// Wait for handler execution.
+        /// </summary>
+        /// <returns></returns>
+        /// <exception cref="ObjectDisposedException"></exception>
+        /// <exception cref="OperationCanceledException"></exception>
+        Task<ProcessedFlagEventArgs<T>> ExecutionStarted();
+    }
+}

src/AsyncFiberWorks/Procedures/ISequentialTaskWaiter.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Threading.Tasks;
+
+namespace AsyncFiberWorks.Procedures
+{
+    /// <summary>
+    /// Use "await" to simply wait for the start of a task on a sequential task list.
+    /// </summary>
+    public interface ISequentialTaskWaiter
+    {
+        /// <summary>
+        /// Wait for task execution.
+        /// </summary>
+        /// <returns></returns>
+        /// <exception cref="ObjectDisposedException"></exception>
+        /// <exception cref="OperationCanceledException"></exception>
+        Task ExecutionStarted();
+    }
+}

src/AsyncFiberWorks/Procedures/SequentialHandlerWaiter.cs

@@ -9,7 +9,7 @@ namespace AsyncFiberWorks.Procedures
     /// Use "await" to simply wait for the start of a task on a sequential handler list.
     /// </summary>
     /// <typeparam name="T"></typeparam>
-    public class SequentialHandlerWaiter<T> : IDisposable
+    public class SequentialHandlerWaiter<T> : IDisposable, ISequentialHandlerWaiter<T>
     {
         private readonly object _lockObj = new object();
         private bool _executionRequested;

src/AsyncFiberWorks/Procedures/SequentialTaskWaiter.cs

@@ -8,7 +8,7 @@ namespace AsyncFiberWorks.Procedures
     /// <summary>
     /// Use "await" to simply wait for the start of a task on a sequential task list.
     /// </summary>
-    public class SequentialTaskWaiter : IDisposable
+    public class SequentialTaskWaiter : IDisposable, ISequentialTaskWaiter
     {
         private readonly object _lockObj = new object();
         private bool _executionRequested;