WaitHandleAwaitable.cs

using System.Threading;

namespace AsyncWaitHandle
{
    /// <summary>
    /// A configuration of an awaiter for a <see cref="System.Threading.WaitHandle"/>
    /// </summary>
    public struct WaitHandleAwaitable
    {
        private WaitHandle _waitHandle;
        private int _timeoutMs;
        private CancellationToken _cancellationToken;

        /// <summary>
        /// Constructor
        /// </summary>
        /// <param name="waitHandle">The <see cref="System.Threading.WaitHandle"/> to wait for</param>
        /// <param name="timeoutMs">The wait timeout in milliseconds, or -1 for indefinite wait</param>
        /// <param name="cancellationToken">The wait cancellation token</param>
        internal WaitHandleAwaitable(WaitHandle waitHandle, int timeoutMs, CancellationToken cancellationToken)
        {
            _waitHandle = waitHandle;
            _timeoutMs = timeoutMs;
            _cancellationToken = cancellationToken;
        }

        /// <summary>
        /// Gets an awaiter used to await the <see cref="System.Threading.WaitHandle"/>
        /// </summary>
        /// <returns>An awaiter instance</returns>
        public WaitHandleAwaiter GetAwaiter() => WaitHandleAwaiter.StartWaiting(_waitHandle, _timeoutMs, _cancellationToken);
    }
}