src/System.Web.Mvc/Async/TaskWrapperAsyncResult.cs


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using System.Threading;
using System.Threading.Tasks;

namespace System.Web.Mvc.Async
{
    /// <summary>
    /// Wraps a <see cref="Task"/> class, optionally overriding the State object (since the Task Asynchronous Pattern doesn't normally use it).
    /// Copied from System.Web.
    /// </summary>
    internal sealed class TaskWrapperAsyncResult : IAsyncResult
    {
        internal TaskWrapperAsyncResult(Task task, object asyncState, Action cleanupThunk = null)
        {
            Task = task;
            AsyncState = asyncState;
            CleanupThunk = cleanupThunk;
        }

        public object AsyncState { get; private set; }

        public WaitHandle AsyncWaitHandle
        {
            get { return ((IAsyncResult)Task).AsyncWaitHandle; }
        }

        /// <summary>
        /// Cleanup logic to run after Task is finished
        /// </summary>
        public Action CleanupThunk { get; private set; }

        public bool CompletedSynchronously
        {
            get { return ((IAsyncResult)Task).CompletedSynchronously; }
        }

        public bool IsCompleted
        {
            get { return ((IAsyncResult)Task).IsCompleted; }
        }

        internal Task Task { get; private set; }
    }
}