using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Autodesk.Revit.DB;

namespace KMBIM
{

    public class KDCSRequest
    {
        // Storing the value as a plain Int makes using the interlocking mechanism simpler
        private List<Element> m_lstAvoidance = 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 List<Element> Take()
        {
            return (List<Element>)Interlocked.Exchange(ref m_lstAvoidance, (List<Element>)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(List<Element> lstSkNozzle)
        {
            Interlocked.Exchange(ref m_lstAvoidance, (List<Element>)lstSkNozzle);
        }
    }
}