using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace KMBIM.Revit.Tools.Cmd.PipeConnection
{
    public class RequestForPipeConnect
    {
        // Storing the value as a plain Int makes using the interlocking mechanism simpler
        private ResolverForPipeConnect m_resolver = null;

        /// <summary>
        ///   Take - The Idling handler calls this to obtain the latest request. 
        /// </summary>
        /// <remarks>
        ///   This is not a getter! It takes the request and replaces it
        ///   with 'None' to indicate that the request has been "passed on".
        /// </remarks>
        /// 
        public ResolverForPipeConnect Take()
        {
            return (ResolverForPipeConnect)Interlocked.Exchange(ref m_resolver, (ResolverForPipeConnect)null);
        }


        /// <summary>
        ///   Make - The Dialog calls this when the user presses a command button there. 
        /// </summary>
        /// <remarks>
        ///   It replaces any older request previously made.
        /// </remarks>
        /// 
        public void Make(ResolverForPipeConnect resolver)
        {
            Interlocked.Exchange(ref m_resolver, resolver);
        }
    }
}