using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.Text;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.Diagnostics;
using System.Threading;
using System.Runtime.InteropServices;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        /// <summary>
        /// 锁啊锁
        /// </summary>
        private ReaderWriterLockSlim _RWLock = new ReaderWriterLockSlim(LockRecursionPolicy.NoRecursion);

        // 打卡队列
        Queue<SigninInfo> _SigninQueue = new Queue<SigninInfo>(600);  

        /// <summary>
        /// 打卡签到进入队列
        /// </summary>
        /// <param name="obj"></param>
        private void Singin(Object obj)
        {
            while (true)
            {
                _RWLock.EnterWriteLock();
                try
                {
                    SigninInfo entity = new SigninInfo();
                    entity.EmployeeID = System.Environment.TickCount;
                    entity.SigninTime = System.DateTime.Now;

                    _SigninQueue.Enqueue(entity);
                }
                finally
                {
                    _RWLock.ExitWriteLock();
                    System.Threading.Thread.Sleep(10);
                }
            }
        }

        /// <summary>
        /// 保存
        /// </summary>
        /// <param name="obj"></param>
        private void Save(Object obj)
        {
            while (true)
            {
                _RWLock.EnterReadLock();
                try
                {
                    if (_SigninQueue.Count == 0)
                    {
                        continue;
                    }

                    SigninInfo entity = _SigninQueue.Dequeue();

                    System.Diagnostics.Debug.WriteLine(String.Format("员工ID={0}，打卡时间={1}", entity.EmployeeID, entity.SigninTime));
                }
                finally
                {
                    _RWLock.ExitReadLock();
                    System.Threading.Thread.Sleep(10);
                }
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            ThreadPool.QueueUserWorkItem(new WaitCallback(Singin), null);
            ThreadPool.QueueUserWorkItem(new WaitCallback(Save), null);
        }
    }

    /// <summary>
    /// 打卡信息
    /// </summary>
    public struct SigninInfo
    {
        public Int32 EmployeeID;
        public DateTime SigninTime;
    }
}