System.Threading.Interlocked.Increment(ref long)

public Object<T> Get(TimeSpan? timeout = null)
        {

            var obj = getFree(true);

            if (obj == null)
            {

                var queueItem = new GetSyncQueueInfo();

                _getSyncQueue.Enqueue(queueItem);
                _getQueue.Enqueue(false);

                if (timeout == null) timeout = Policy.SyncGetTimeout;

                try
                {
                    if (queueItem.Wait.Wait(timeout.Value))
                        obj = queueItem.ReturnValue;
                }
                catch { }

                if (obj == null) obj = queueItem.ReturnValue;
                if (obj == null) lock (queueItem.Lock) queueItem.IsTimeout = (obj = queueItem.ReturnValue) == null;
                if (obj == null) obj = queueItem.ReturnValue;

                if (obj == null)
                {

                    Policy.OnGetTimeout();

                    if (Policy.IsThrowGetTimeoutException)
                        throw new TimeoutException($"SafeObjectPool.Get 获取超时（{timeout.Value.TotalSeconds}秒）。");

                    return null;
                }
            }

            try
            {
                Policy.OnGet(obj);
            }
            catch
            {
                Return(obj);
                throw;
            }

            obj.LastGetThreadId = Thread.CurrentThread.ManagedThreadId;
            obj.LastGetTime = DateTime.Now;
            Interlocked.Increment(ref obj._getTimes);

            return obj;
        }

async public Task<Object<T>> GetAsync()
        {

            var obj = getFree(true);

            if (obj == null)
            {

                if (Policy.AsyncGetCapacity > 0 && _getAsyncQueue.Count >= Policy.AsyncGetCapacity - 1)
                    throw new OutOfMemoryException($"SafeObjectPool.GetAsync 无可用资源且队列过长，Policy.AsyncGetCapacity = {Policy.AsyncGetCapacity}。");

                var tcs = new TaskCompletionSource<Object<T>>();

                _getAsyncQueue.Enqueue(tcs);
                _getQueue.Enqueue(true);

                obj = await tcs.Task;

                //if (timeout == null) timeout = Policy.SyncGetTimeout;

                //if (tcs.Task.Wait(timeout.Value))
                //	obj = tcs.Task.Result;

                //if (obj == null) {

                //	tcs.TrySetCanceled();
                //	Policy.GetTimeout();

                //	if (Policy.IsThrowGetTimeoutException)
                //		throw new Exception($"SafeObjectPool.GetAsync 获取超时（{timeout.Value.TotalSeconds}秒）。");

                //	return null;
                //}
            }

            try
            {
                await Policy.OnGetAsync(obj);
            }
            catch
            {
                Return(obj);
                throw;
            }

            obj.LastGetThreadId = Thread.CurrentThread.ManagedThreadId;
            obj.LastGetTime = DateTime.Now;
            Interlocked.Increment(ref obj._getTimes);

            return obj;
        }

public Object<T> Get(TimeSpan? timeout = null)
        {

            var obj = GetFree(true);

            if (obj == null)
            {

                var queueItem = new GetSyncQueueInfo();

                _getSyncQueue.Enqueue(queueItem);
                _getQueue.Enqueue(false);

                if (timeout == null) timeout = Policy.SyncGetTimeout;

                try
                {
                    if (queueItem.Wait.Wait(timeout.Value))
                        obj = queueItem.ReturnValue;
                }
                catch { }

                if (obj == null) obj = queueItem.ReturnValue;
                if (obj == null) lock (queueItem.Lock) queueItem.IsTimeout = (obj = queueItem.ReturnValue) == null;
                if (obj == null) obj = queueItem.ReturnValue;

                if (obj == null)
                {

                    Policy.OnGetTimeout();

                    if (Policy.IsThrowGetTimeoutException)
                        throw new TimeoutException($"ObjectPool.Get() timeout {timeout.Value.TotalSeconds} seconds");

                    return null;
                }
            }

            try
            {
                Policy.OnGet(obj);
            }
            catch
            {
                Return(obj);
                throw;
            }

            obj.LastGetThreadId = Thread.CurrentThread.ManagedThreadId;
            obj.LastGetTime = DateTime.Now;
            Interlocked.Increment(ref obj._getTimes);

            return obj;
        }

internal TValue GetOrCreate()
            {
                if (isdisposed == true) return null;
                if (value == null)
                {
                    var iscreate = false;
                    var now = DateTime.Now;
                    try
                    {
                        lock (valueLock)
                        {
                            if (isdisposed == true) return null;
                            if (value == null)
                            {
                                value = create();
                                createTime = DateTime.Now;
                                Interlocked.Increment(ref ib._usageQuanreplacedy);
                                iscreate = true;
                            }
                            else
                            {
                                return value;
                            }
                        }
                        if (iscreate)
                        {
                            if (value != null)
                            {
                                if (firstValue == null) firstValue = value; //记录首次值
                                else if (firstValue == value) IsRegisterError = true; //第二次与首次相等，注册姿势错误
                            }
                            ib.OnNotice(new NoticeEventArgs(NoticeType.AutoCreate, key, null, $"{key} 实例+++创建成功，耗时 {DateTime.Now.Subtract(now).TotalMilliseconds}ms，{ib._usageQuanreplacedy}/{ib.Quanreplacedy}"));
                        }
                    }
                    catch (Exception ex)
                    {
                        ib.OnNotice(new NoticeEventArgs(NoticeType.AutoCreate, key, ex, $"{key} 实例+++创建失败：{ex.Message}"));
                        throw;
                    }
                }
                lastActiveTime = DateTime.Now;
                Interlocked.Increment(ref activeCounter);
                return value;
            }

internal TValue GetOrCreate()
            {
                if (isdisposed == true) return null;
                if (value == null)
                {
                    var iscreate = false;
                    var now = DateTime.Now;
                    try
                    {
                        lock (valueLock)
                        {
                            if (isdisposed == true) return null;
                            if (value == null)
                            {
                                value = create();
                                createTime = DateTime.Now;
                                Interlocked.Increment(ref ib._usageQuanreplacedy);
                                iscreate = true;
                            }
                            else
                            {
                                return value;
                            }
                        }
                        if (iscreate)
                        {
                            if (value != null)
                            {
                                if (firstValue == null) firstValue = value; //记录首次值
                                else if (firstValue == value) IsRegisterError = true; //第二次与首次相等，注册姿势错误
                            }
                            ib.OnNotice(new NoticeEventArgs(NoticeType.AutoCreate, key, null, $"{key} 实例+++创建成功，耗时 {DateTime.Now.Subtract(now).TotalMilliseconds}ms，{ib._usageQuanreplacedy}/{ib.Quanreplacedy}"));
                        }
                    }
                    catch (Exception ex)
                    {
                        ib.OnNotice(new NoticeEventArgs(NoticeType.AutoCreate, key, ex, $"{key} 实例+++创建失败：{ex.Message}"));
                        throw;
                    }
                }
                lastActiveTime = DateTime.Now;
                Interlocked.Increment(ref activeCounter);
                return value;
            }

void InternalRemoveDelayHandler()
        {
            //处理延时删除
            var removeKeys = _removePending.Keys;
            foreach (var removeKey in removeKeys)
            {
                if (_removePending.TryGetValue(removeKey, out var removeItem) == false) continue;
                if (DateTime.Now.Subtract(removeItem.lastActiveTime) <= removeItem.idle) continue;
                try
                {
                    removeItem.Release(() => true);
                }
                catch (Exception ex)
                {
                    var tmp1 = Interlocked.Increment(ref removeItem.releaseErrorCounter);
                    this.OnNotice(new NoticeEventArgs(NoticeType.Remove, removeItem.key, ex, $"{removeKey} ---延时释放执行出错({tmp1}次)：{ex.Message}"));
                    if (tmp1 < 3)
                        continue;
                }
                removeItem.Dispose();
                _removePending.TryRemove(removeKey, out var oldItem);
            }
        }

async public Task<Object<T>> GetAsync()
        {

            var obj = GetFree(true);

            if (obj == null)
            {

                if (Policy.AsyncGetCapacity > 0 && _getAsyncQueue.Count >= Policy.AsyncGetCapacity - 1)
                    throw new OutOfMemoryException($"ObjectPool.GetAsync() The queue is too long. Policy.AsyncGetCapacity = {Policy.AsyncGetCapacity}");

                var tcs = new TaskCompletionSource<Object<T>>();

                _getAsyncQueue.Enqueue(tcs);
                _getQueue.Enqueue(true);

                obj = await tcs.Task;

                //if (timeout == null) timeout = Policy.SyncGetTimeout;

                //if (tcs.Task.Wait(timeout.Value))
                //    obj = tcs.Task.Result;

                //if (obj == null) {

                //    tcs.TrySetCanceled();
                //    Policy.GetTimeout();

                //    if (Policy.IsThrowGetTimeoutException)
                //        throw new Exception($"ObjectPool.GetAsync() timeout {timeout.Value.TotalSeconds} seconds");

                //    return null;
                //}
            }

            try
            {
                await Policy.OnGetAsync(obj);
            }
            catch
            {
                Return(obj);
                throw;
            }

            obj.LastGetThreadId = Thread.CurrentThread.ManagedThreadId;
            obj.LastGetTime = DateTime.Now;
            Interlocked.Increment(ref obj._getTimes);

            return obj;
        }

private byte[] ReceiveBytes(int countByte)
        {
            //if (!Loger.IsServer) Loger.Log("Client ReceiveBytes " + countByte.ToString() + ", " + Client.ReceiveBufferSize);
            //результат
            byte[] msg = new byte[countByte];
            //сколько уже считано
            int offset = 0;
            //буфер результата
            byte[] receiveBuffer = new byte[Client.ReceiveBufferSize];
            //кол-во считано байт последний раз
            int numberOfBytesRead = 0;
            //длина передаваемого сообщения (принимается в первых 4 байтах (константа Int32Length))
            int lenghtAllMessageByte = countByte;
            var timeOut = DateTime.UtcNow.AddMilliseconds(SilenceTime);

            while (lenghtAllMessageByte > 0)
            {
                int maxCountRead = receiveBuffer.Length;
                if (maxCountRead > lenghtAllMessageByte) maxCountRead = lenghtAllMessageByte;


                //numberOfBytesRead = ClientStream.Read(receiveBuffer, 0, maxCountRead);

                var receiveId = Interlocked.Increment(ref ReceiveId);
                ClientStream.BeginRead(receiveBuffer, 0, maxCountRead, ReceiveBytescallback, receiveId);

                while (!ReceiveReady.ContainsKey(receiveId)
                    && timeOut > DateTime.UtcNow)
                    Thread.Sleep(1);

                lock (ReceiveReady)
                {
                    if (ReceiveReady.ContainsKey(receiveId))
                    {
                        var objRes = ReceiveReady[receiveId];
                        if (objRes is Exception) throw (Exception)objRes;
                        numberOfBytesRead = (int)ReceiveReady[receiveId];
                        ReceiveReady.Remove(receiveId);
                    }
                    else
                        throw new ConnectSilenceTimeOutException();
                }

                if (!Client.Client.Connected)
                {
                    throw new ConnectNotConnectedException();
                }


                if (numberOfBytesRead == 0)
                {
                    if (timeOut < DateTime.UtcNow)
                        throw new ConnectSilenceTimeOutException();
                    Thread.Sleep(1);
                }
                else
                {
                    timeOut = DateTime.UtcNow.AddMilliseconds(SilenceTime);
                    Buffer.BlockCopy(receiveBuffer, 0, msg, offset, numberOfBytesRead);
                    offset += numberOfBytesRead;
                    lenghtAllMessageByte -= numberOfBytesRead;
                }
            };

            return msg;
        }

private void Run(Session session, int biotasPerTest)
        {
            CommandHandlerHelper.WriteOutputInfo(session, $"Starting Shard Database Performance Tests.\nBiotas per test: {biotasPerTest}\nThis may take several minutes to complete...\nCurrent database queue count: {DatabaseManager.Shard.QueueCount}");


            // Get the current queue wait time
            bool responseReceived = false;

            DatabaseManager.Shard.GetCurrentQueueWaitTime(result =>
            {
                CommandHandlerHelper.WriteOutputInfo(session, $"Current database queue wait time: {result.TotalMilliseconds:N0} ms");
                responseReceived = true;
            });

            while (!responseReceived)
                Thread.Sleep(1);


            // Generate Individual WorldObjects
            var biotas = new Collection<(Biota biota, ReaderWriterLockSlim rwLock)>();

            for (int i = 0; i < biotasPerTest; i++)
            {
                var worldObject = WorldObjectFactory.CreateNewWorldObject(testWeenies[i % testWeenies.Count]);
                // TODO fix this
                //biotas.Add((worldObject.Biota, worldObject.BiotaDatabaseLock));
            }


            // Add biotasPerTest biotas individually
            long trueResults = 0;
            long falseResults = 0;
            var startTime = DateTime.UtcNow;
            var initialQueueWaitTime = TimeSpan.Zero;
            var totalQueryExecutionTime = TimeSpan.Zero;
            foreach (var biota in biotas)
            {
                /* todo
                DatabaseManager.Shard.SaveBiota(biota.biota, biota.rwLock, result =>
                {
                    if (result)
                        Interlocked.Increment(ref trueResults);
                    else
                        Interlocked.Increment(ref falseResults);
                }, (queueWaitTime, queryExecutionTime) =>
                {
                    if (initialQueueWaitTime == TimeSpan.Zero)
                        initialQueueWaitTime = queueWaitTime;

                    totalQueryExecutionTime += queryExecutionTime;
                });*/
            }

            while (Interlocked.Read(ref trueResults) + Interlocked.Read(ref falseResults) < biotas.Count)
                Thread.Sleep(1);

            var endTime = DateTime.UtcNow;
            ReportResult(session, "individual add", biotasPerTest, (endTime - startTime), initialQueueWaitTime, totalQueryExecutionTime, trueResults, falseResults);


            // Update biotasPerTest biotas individually
            if (session == null || SessionIsStillInWorld(session))
            {
                ModifyBiotas(biotas);

                trueResults = 0;
                falseResults = 0;
                startTime = DateTime.UtcNow;
                initialQueueWaitTime = TimeSpan.Zero;
                totalQueryExecutionTime = TimeSpan.Zero;

                foreach (var biota in biotas)
                {
                    /* todo
                    DatabaseManager.Shard.SaveBiota(biota.biota, biota.rwLock, result =>
                    {
                        if (result)
                            Interlocked.Increment(ref trueResults);
                        else
                            Interlocked.Increment(ref falseResults);
                    }, (queueWaitTime, queryExecutionTime) =>
                    {
                        if (initialQueueWaitTime == TimeSpan.Zero)
                            initialQueueWaitTime = queueWaitTime;

                        totalQueryExecutionTime += queryExecutionTime;
                    });*/
                }

                while (Interlocked.Read(ref trueResults) + Interlocked.Read(ref falseResults) < biotas.Count)
                    Thread.Sleep(1);

                endTime = DateTime.UtcNow;
                ReportResult(session, "individual save", biotasPerTest, (endTime - startTime), initialQueueWaitTime, totalQueryExecutionTime, trueResults, falseResults);
            }


            // Delete biotasPerTest biotas individually
            trueResults = 0;
            falseResults = 0;
            startTime = DateTime.UtcNow;
            initialQueueWaitTime = TimeSpan.Zero;
            totalQueryExecutionTime = TimeSpan.Zero;

            foreach (var biota in biotas)
            {
                DatabaseManager.Shard.RemoveBiota(biota.biota.Id, result =>
                {
                    if (result)
                        Interlocked.Increment(ref trueResults);
                    else
                        Interlocked.Increment(ref falseResults);
                }, (queueWaitTime, queryExecutionTime) =>
                {
                    if (initialQueueWaitTime == TimeSpan.Zero)
                        initialQueueWaitTime = queueWaitTime;

                    totalQueryExecutionTime += queryExecutionTime;
                });
            }

            while (Interlocked.Read(ref trueResults) + Interlocked.Read(ref falseResults) < biotas.Count)
                Thread.Sleep(1);

            endTime = DateTime.UtcNow;
            ReportResult(session, "individual remove", biotasPerTest, (endTime - startTime), initialQueueWaitTime, totalQueryExecutionTime, trueResults, falseResults);


            if (session != null && !SessionIsStillInWorld(session))
                return;

            // Generate Bulk WorldObjects
            biotas.Clear();

            for (int i = 0; i < biotasPerTest; i++)
            {
                var worldObject = WorldObjectFactory.CreateNewWorldObject(testWeenies[i % testWeenies.Count]);
                // TODO fix this
                //biotas.Add((worldObject.Biota, worldObject.BiotaDatabaseLock));
            }


            // Add biotasPerTest biotas in bulk
            trueResults = 0;
            falseResults = 0;
            startTime = DateTime.UtcNow;
            initialQueueWaitTime = TimeSpan.Zero;
            totalQueryExecutionTime = TimeSpan.Zero;
            /* todo
            DatabaseManager.Shard.SaveBiotasInParallel(biotas, result =>
            {
                if (result)
                    Interlocked.Increment(ref trueResults);
                else
                    Interlocked.Increment(ref falseResults);
            }, (queueWaitTime, queryExecutionTime) =>
            {
                if (initialQueueWaitTime == TimeSpan.Zero)
                    initialQueueWaitTime = queueWaitTime;

                totalQueryExecutionTime += queryExecutionTime;
            });*/

            while (Interlocked.Read(ref trueResults) + Interlocked.Read(ref falseResults) < 1)
                Thread.Sleep(1);

            endTime = DateTime.UtcNow;
            ReportResult(session, "bulk add", biotasPerTest, (endTime - startTime), initialQueueWaitTime, totalQueryExecutionTime, trueResults, falseResults);


            // Update biotasPerTest biotas in bulk
            if (session == null || SessionIsStillInWorld(session))
            {
                ModifyBiotas(biotas);

                trueResults = 0;
                falseResults = 0;
                startTime = DateTime.UtcNow;
                initialQueueWaitTime = TimeSpan.Zero;
                totalQueryExecutionTime = TimeSpan.Zero;
                /* todo
                DatabaseManager.Shard.SaveBiotasInParallel(biotas, result =>
                {
                    if (result)
                        Interlocked.Increment(ref trueResults);
                    else
                        Interlocked.Increment(ref falseResults);
                }, (queueWaitTime, queryExecutionTime) =>
                {
                    if (initialQueueWaitTime == TimeSpan.Zero)
                        initialQueueWaitTime = queueWaitTime;

                    totalQueryExecutionTime += queryExecutionTime;
                });*/

                while (Interlocked.Read(ref trueResults) + Interlocked.Read(ref falseResults) < 1)
                    Thread.Sleep(1);

                endTime = DateTime.UtcNow;
                ReportResult(session, "bulk save", biotasPerTest, (endTime - startTime), initialQueueWaitTime, totalQueryExecutionTime, trueResults, falseResults);
            }


            // Delete biotasPerTest biotas in bulk
            trueResults = 0;
            falseResults = 0;
            startTime = DateTime.UtcNow;
            initialQueueWaitTime = TimeSpan.Zero;
            totalQueryExecutionTime = TimeSpan.Zero;

            var ids = biotas.Select(r => r.biota.Id).ToList();

            DatabaseManager.Shard.RemoveBiotasInParallel(ids, result =>
            {
                if (result)
                    Interlocked.Increment(ref trueResults);
                else
                    Interlocked.Increment(ref falseResults);
            }, (queueWaitTime, queryExecutionTime) =>
            {
                if (initialQueueWaitTime == TimeSpan.Zero)
                    initialQueueWaitTime = queueWaitTime;

                totalQueryExecutionTime += queryExecutionTime;
            });

            while (Interlocked.Read(ref trueResults) + Interlocked.Read(ref falseResults) < 1)
                Thread.Sleep(1);

            endTime = DateTime.UtcNow;
            ReportResult(session, "bulk remove", biotasPerTest, (endTime - startTime), initialQueueWaitTime, totalQueryExecutionTime, trueResults, falseResults);


            if (session != null && !SessionIsStillInWorld(session))
                return;

            CommandHandlerHelper.WriteOutputInfo(session, "Database Performance Tests Completed");
        }

public static long C2S_CRCErrors_Aggregate_Increment() { return Interlocked.Increment(ref Instance._C2S_CRCErrors_Aggregate); }

public static long C2S_RequestsForRetransmit_Aggregate_Increment() { return Interlocked.Increment(ref Instance._C2S_RequestsForRetransmit_Aggregate); }

public static long C2S_Packets_Aggregate_Increment() { return Interlocked.Increment(ref Instance._C2S_Packets_Aggregate); }

public static long S2C_RequestsForRetransmit_Aggregate_Increment() { return Interlocked.Increment(ref Instance._S2C_RequestsForRetransmit_Aggregate); }

public static long S2C_Packets_Aggregate_Increment() { return Interlocked.Increment(ref Instance._S2C_Packets_Aggregate); }

public void NotifyChanged()
            {
                using (new ReadLockScope(m_lock))
                {
                    Interlocked.Increment(ref m_outstandingRefreshId);
                }
            }

public static void Run(this Process process, bool noEcho, string echoPrefix, CancellationToken cancellationToken)
        {
            var cancelled = 0L;

            if (!noEcho)
            {
                Console.Out.WriteLine(process.GetMessage(echoPrefix));
            }

            _ = process.Start();

            using (cancellationToken.Register(
                () =>
                {
                    if (process.TryKill())
                    {
                        _ = Interlocked.Increment(ref cancelled);
                    }
                },
                useSynchronizationContext: false))
            {
                process.WaitForExit();
            }

            if (Interlocked.Read(ref cancelled) == 1)
            {
                cancellationToken.ThrowIfCancellationRequested();
            }
        }

internal void Work()
        {
            if (threadStart != null)
            {
                threadStart();
            }
            threadStart = null;

            while (true)
            {
                //When the owning ParallelLooper is told to start a loop, it will notify the worker via this signal.
                getToWork.WaitOne();
                if (manager.currentLoopBody == null)
                {
                    //Woops, looks like it's time for me to die.
                    manager.OnWorkerFinish();
                    return;
                }

                while (manager.jobIndex <= manager.maxJobIndex)
                {
                    //Claim a piece of job.
                    int jobIndex = Interlocked.Increment(ref manager.jobIndex);
                    //The job interval.
                    int endIndex = jobIndex * iterationsPerSteal;
                    int beginIndex = endIndex - iterationsPerSteal;

                    //Do the job piece.  Make sure you don't do more than exists in the list itself.
                    for (int i = beginIndex; i < endIndex && i < finalIndex; i++)
                    {
                        manager.currentLoopBody(i);
                    }
                } //this is not 'thread safe' but the result of the unsafety is a quick fail in the worst case.

                manager.OnWorkerFinish();
            }
        }

void InitializeId()
        {
            InstanceId = System.Threading.Interlocked.Increment(ref idCounter);

            hashCode = (int)((((ulong)InstanceId) * 4294967311UL) % 4294967296UL);
        }

public RedisConnection2 GetConnection()
        {
            var conn = GetFreeConnection();
            if (conn == null)
            {
                var wait = new ManualResetEventSlim(false);
                lock (_lock_GetConnectionQueue)
                {
                    GetConnectionQueue.Enqueue(wait);
                }

                if (wait.Wait(TimeSpan.FromSeconds(10)))
                    return GetConnection();
                throw new Exception("CSRedis.ConnectionPool.GetConnection 连接池获取超时（10秒）");
            }

            if (conn.Client.IsConnected == false || DateTime.Now.Subtract(conn.LastActive).TotalSeconds > 60)
                try
                {
                    conn.Client.Ping();
                }
                catch
                {
                    var ips = Dns.GetHostAddresses(_ip);
                    if (ips.Length == 0) throw new Exception($"无法解析“{_ip}”");
                    try
                    {
                        conn.Client.Dispose();
                    }
                    catch
                    {
                    }

                    conn.Client = new RedisClient(new IPEndPoint(ips[0], _port));
                    conn.Client.Connected += Connected;
                }

            conn.ThreadId = Thread.CurrentThread.ManagedThreadId;
            conn.LastActive = DateTime.Now;
            Interlocked.Increment(ref conn.UseSum);
            return conn;
        }

public async Task<RedisConnection2> GetConnectionAsync()
        {
            var conn = GetFreeConnection();
            if (conn == null)
            {
                var tcs = new TaskCompletionSource<RedisConnection2>();
                lock (_lock_GetConnectionQueue)
                {
                    GetConnectionAsyncQueue.Enqueue(tcs);
                }

                conn = await tcs.Task;
            }

            if (conn.Client.IsConnected == false || DateTime.Now.Subtract(conn.LastActive).TotalSeconds > 60)
                try
                {
                    await conn.Client.PingAsync();
                }
                catch
                {
                    var ips = Dns.GetHostAddresses(_ip);
                    if (ips.Length == 0) throw new Exception($"无法解析“{_ip}”");
                    try
                    {
                        conn.Client.Dispose();
                    }
                    catch
                    {
                    }

                    conn.Client = new RedisClient(new IPEndPoint(ips[0], _port));
                    conn.Client.Connected += Connected;
                }

            conn.ThreadId = Thread.CurrentThread.ManagedThreadId;
            conn.LastActive = DateTime.Now;
            Interlocked.Increment(ref conn.UseSum);
            return conn;
        }

protected override void DoAsync()
        {
            HttpApiCaller caller = new HttpApiCaller(Host);
            caller.CreateRequest($"{Station}/{Api}","POST",Arg);
            var result = caller.GetResult().Result;
            if (caller.Status != WebExceptionStatus.Success)
                Interlocked.Increment(ref NetError);
        }

void Async()
        {
            Interlocked.Increment(ref WaitCount);
            GlobalContext.SetRequestContext(ZeroApplication.Config.ServiceName, Guid.NewGuid().ToString("N"));
            DateTime s = DateTime.Now;

            DoAsync();

            Interlocked.Decrement(ref WaitCount);
            var sp = (DateTime.Now - s);
            Interlocked.Add(ref RunTime, sp.Ticks);
            if (sp.TotalMilliseconds > 500)
                Interlocked.Increment(ref TmError);
            if ((Interlocked.Increment(ref ExCount) % 100) == 0)
                Count();
        }

protected override void DoAsync()
        {
            var arg = new MachineEventArg
            {
                EventName = "OpenDoor",
                MachineId = $"Machine-{random.Next()}",
                JsonStr = JsonConvert.SerializeObject(new OpenDoorArg
                {
                    CompanyId ="��˾id",
                    UserType ="�û�����",
                    UserId = random.Next().ToString(),
                    DeviceId ="�豸id",
                    RecordDate=DateTime.Now.ToString(),
                    RecordUserStatus="״̬",
                    InOrOut= $"{((random.Next() % 2) == 1 ? "��" : "��")}",
                    EnterType="������ʽ",
                    PhotoUrl="������",
                    IdenreplacedyImageUrl="֤����",
                    PanoramaUrl="ȫ����",
                    Score="ʶ��ϵ��"
                })
            };
            ApiClient client = new ApiClient
            {
                Station = Station,
                Commmand = Api,
                Argument = JsonConvert.SerializeObject(arg)
            };
            client.CallCommand();
            if (client.State < ZeroOperatorStateType.Failed)
            {
            }
            else if (client.State < ZeroOperatorStateType.Error)
            {
                Interlocked.Increment(ref BlError);
            }
            else if (client.State < ZeroOperatorStateType.TimeOut)
            {
                Interlocked.Increment(ref WkError);
            }
            else if (client.State > ZeroOperatorStateType.LocalNoReady)
            {
                Interlocked.Increment(ref ExError);
            }
            else
            {
                Interlocked.Increment(ref NetError);
            }
        }

static void Worker()
        {
            while (true)
            {
                try
                {
                    using (var req = new HttpRequest()
                    {
                        Proxy = scraper.Next(),
                        Cookies = new CookieStorage()
                    })
                    {
                        req.UserAgentRandomize();
                        req.Cookies.Container.Add(new Uri("https://www.youtube.com"), new Cookie("CONSENT", "YES+cb.20210629-13-p0.en+FX+407"));

                        var sres = req.Get($"https://www.youtube.com/watch?v={id}").ToString();
                        var viewersTemp = string.Join("", RegularExpressions.Viewers.Match(sres).Groups[1].Value.Where(char.IsDigit));

                        if (!string.IsNullOrEmpty(viewersTemp))
                            viewers = viewersTemp;

                        replacedle = RegularExpressions.replacedle.Match(sres).Groups[1].Value;

                        var url = RegularExpressions.ViewUrl.Match(sres).Groups[1].Value;
                        url = url.Replace(@"\u0026", "&").Replace("%2C", ",").Replace(@"\/", "/");

                        var query = System.Web.HttpUtility.ParseQueryString(url);

                        var cl = query.Get(query.AllKeys[0]);
                        var ei = query.Get("ei");
                        var of = query.Get("of");
                        var vm = query.Get("vm");
                        var cpn = GetCPN();

                        var start = DateTime.UtcNow;

                        var st = random.Next(1000, 10000);
                        var et = GetCmt(start);
                        var lio = GetLio(start);

                        var rt = random.Next(10, 200);

                        var lact = random.Next(1000, 8000);
                        var rtn = rt + 300;

                        var args = new Dictionary<string, string>
                        {
                            ["ns"] = "yt",
                            ["el"] = "detailpage",
                            ["cpn"] = cpn,
                            ["docid"] = id,
                            ["ver"] = "2",
                            ["cmt"] = et.ToString(),
                            ["ei"] = ei,
                            ["fmt"] = "243",
                            ["fs"] = "0",
                            ["rt"] = rt.ToString(),
                            ["of"] = of,
                            ["euri"] = "",
                            ["lact"] = lact.ToString(),
                            ["live"] = "dvr",
                            ["cl"] = cl,
                            ["state"] = "playing",
                            ["vm"] = vm,
                            ["volume"] = "100",
                            ["cbr"] = "Firefox",
                            ["cbrver"] = "83.0",
                            ["c"] = "WEB",
                            ["cplayer"] = "UNIPLAYER",
                            ["cver"] = "2.20201210.01.00",
                            ["cos"] = "Windows",
                            ["cosver"] = "10.0",
                            ["cplatform"] = "DESKTOP",
                            ["delay"] = "5",
                            ["hl"] = "en_US",
                            ["rtn"] = rtn.ToString(),
                            ["aftm"] = "140",
                            ["rti"] = rt.ToString(),
                            ["muted"] = "0",
                            ["st"] = st.ToString(),
                            ["et"] = et.ToString(),
                            ["lio"] = lio.ToString()
                        };

                        string urlToGet = buildUrl(args);
                        req.AcceptEncoding ="gzip, deflate";
                        req.AddHeader("Host", "www.youtube.com");
                        req.Get(urlToGet.Replace("watchtime", "playback"));

                        req.AcceptEncoding ="gzip, deflate";
                        req.AddHeader("Host", "www.youtube.com");
                        req.Get(urlToGet);
                        
                        Interlocked.Increment(ref botted);
                    }
                }
                catch
                {
                    Interlocked.Increment(ref errors);
                }

                Thread.Sleep(1);
            }
        }

public Guid Next()
        {
            var guidBytes = Guid.NewGuid().ToByteArray();
            var counterBytes = BitConverter.GetBytes(Interlocked.Increment(ref _counter));

            if (!BitConverter.IsLittleEndian)
            {
                Array.Reverse(counterBytes);
            }

            guidBytes[08] = counterBytes[1];
            guidBytes[09] = counterBytes[0];
            guidBytes[10] = counterBytes[7];
            guidBytes[11] = counterBytes[6];
            guidBytes[12] = counterBytes[5];
            guidBytes[13] = counterBytes[4];
            guidBytes[14] = counterBytes[3];
            guidBytes[15] = counterBytes[2];

            return new Guid(guidBytes);
        }

private void Next(Task t)
            {
                if (t.IsCanceled || _cts.IsCancellationRequested)
                {
                    ResumeHelper.Resume(ref _resume);
                    return;
                }
                var value = Interlocked.Increment(ref _available);
                ResumeHelper.Resume(ref _resume);

                if (value != _end)
                {
                    // FIXME compensate for drifts
                    Task.Delay(_period, _cts.Token)
                        .ContinueWith(NextAction, this);
                }
            }

internal override void Drain()
            {
                if (Interlocked.Increment(ref wip) != 1)
                {
                    return;
                }

                var missed = 1;
                var observers = this.observers;
                var downstream = this.downstream;
                var delayErrors = this.delayErrors;
                var sources = this.sources;
                var n = sources.Length;

                for (; ; )
                {
                    if (Volatile.Read(ref disposed))
                    {
                        while (observers.TryDequeue(out var inner))
                        {
                            inner.Dispose();
                        }
                    }
                    else
                    {
                        if (!delayErrors)
                        {
                            var ex = Volatile.Read(ref errors);
                            if (ex != null)
                            {
                                Volatile.Write(ref disposed, true);
                                downstream.OnError(ex);
                                continue;
                            }
                        }

                        var idx = index;
                        if (active < maxConcurrency && idx < n)
                        {
                            var src = sources[idx];

                            index = idx + 1;
                            active++;

                            SubscribeTo(src);
                            continue;
                        }

                        var d = index == n;
                        var empty = !observers.TryPeek(out var inner);

                        if (d && empty)
                        {
                            Volatile.Write(ref disposed, true);
                            var ex = Volatile.Read(ref errors);
                            if (ex != null)
                            {
                                downstream.OnError(ex);
                            }
                            else
                            {
                                downstream.OnCompleted();
                            }
                        }
                        else
                        if (!empty)
                        {
                            var state = inner.GetState();

                            if (state == 1)
                            {
                                downstream.OnNext(inner.value);
                                observers.TryDequeue(out var _);
                                active--;
                                continue;
                            }
                            else
                            if (state == 2)
                            {
                                observers.TryDequeue(out var _);
                                active--;
                                continue;
                            }
                        }
                    }

                    missed = Interlocked.Add(ref wip, -missed);
                    if (missed == 0)
                    {
                        break;
                    }
                }
            }

internal override void Drain()
            {
                if (Interlocked.Increment(ref wip) != 1)
                {
                    return;
                }

                var missed = 1;
                var observers = this.observers;
                var downstream = this.downstream;
                var delayErrors = this.delayErrors;
                var sources = this.sources;

                for (; ; )
                {
                    if (Volatile.Read(ref disposed))
                    {
                        while (observers.TryDequeue(out var inner))
                        {
                            inner.Dispose();
                        }
                        if (sources != null)
                        {
                            this.sources = null;
                            sources.Dispose();
                        }
                    }
                    else
                    {
                        if (!delayErrors)
                        {
                            var ex = Volatile.Read(ref errors);
                            if (ex != null)
                            {
                                Volatile.Write(ref disposed, true);
                                downstream.OnError(ex);
                                continue;
                            }
                        }

                        if (active < maxConcurrency && !done)
                        {

                            var src = default(IMaybeSource<T>);

                            try
                            {
                                if (sources.MoveNext())
                                {
                                    src = sources.Current;
                                }
                                else
                                {
                                    done = true;
                                }
                            }
                            catch (Exception ex)
                            {
                                done = true;
                                sources.Dispose();
                                this.sources = null;

                                if (delayErrors)
                                {
                                    ExceptionHelper.AddException(ref errors, ex);
                                }
                                else
                                {
                                    Interlocked.CompareExchange(ref errors, ex, null);
                                }
                                continue;
                            }

                            if (!done)
                            {
                                active++;

                                SubscribeTo(src);
                                continue;
                            }
                            else
                            {
                                sources.Dispose();
                                this.sources = null;
                            }
                        }

                        var d = done;
                        var empty = !observers.TryPeek(out var inner);

                        if (d && empty)
                        {
                            Volatile.Write(ref disposed, true);
                            var ex = Volatile.Read(ref errors);
                            if (ex != null)
                            {
                                downstream.OnError(ex);
                            }
                            else
                            {
                                downstream.OnCompleted();
                            }
                        }
                        else
                        if (!empty)
                        {
                            var state = inner.GetState();

                            if (state == 1)
                            {
                                downstream.OnNext(inner.value);
                                observers.TryDequeue(out var _);
                                active--;
                                continue;
                            }
                            else
                            if (state == 2)
                            {
                                observers.TryDequeue(out var _);
                                active--;
                                continue;
                            }
                        }
                    }

                    missed = Interlocked.Add(ref wip, -missed);
                    if (missed == 0)
                    {
                        break;
                    }
                }
            }

internal override void Drain()
            {
                if (Interlocked.Increment(ref wip) != 1)
                {
                    return;
                }

                var missed = 1;
                var observers = this.observers;
                var downstream = this.downstream;
                var delayErrors = this.delayErrors;
                var sources = this.queue;

                for (; ; )
                {
                    if (Volatile.Read(ref disposed))
                    {
                        while (observers.TryDequeue(out var inner))
                        {
                            inner.Dispose();
                        }

                        while (sources.TryDequeue(out var _)) ;
                    }
                    else
                    {
                        if (!delayErrors)
                        {
                            var ex = Volatile.Read(ref errors);
                            if (ex != null)
                            {
                                Volatile.Write(ref disposed, true);
                                downstream.OnError(ex);
                                DisposableHelper.Dispose(ref upstream);
                                continue;
                            }
                        }

                        if (!noMoreSources && active < maxConcurrency && !sources.IsEmpty)
                        {

                            if (sources.TryDequeue(out var v))
                            {
                                var src = default(IMaybeSource<R>);
                                try
                                {
                                    src = RequireNonNullRef(mapper(v), "The mapper returned a null IMaybeSource");
                                }
                                catch (Exception ex)
                                {
                                    if (delayErrors)
                                    {
                                        ExceptionHelper.AddException(ref errors, ex);
                                        Volatile.Write(ref done, true);

                                    }
                                    else
                                    {
                                        Interlocked.CompareExchange(ref errors, ex, null);
                                    }
                                    noMoreSources = true;
                                    DisposableHelper.Dispose(ref upstream);
                                    continue;
                                }

                                active++;

                                SubscribeTo(src);
                                continue;
                            }
                        }

                        var d = Volatile.Read(ref done) && sources.IsEmpty;
                        var empty = !observers.TryPeek(out var inner);

                        if (d && empty)
                        {
                            Volatile.Write(ref disposed, true);
                            var ex = Volatile.Read(ref errors);
                            if (ex != null)
                            {
                                downstream.OnError(ex);
                            }
                            else
                            {
                                downstream.OnCompleted();
                            }
                            DisposableHelper.Dispose(ref upstream);
                        }
                        else
                        if (!empty)
                        {
                            var state = inner.GetState();

                            if (state == 1)
                            {
                                downstream.OnNext(inner.value);
                                observers.TryDequeue(out var _);
                                active--;
                                continue;
                            }
                            else
                            if (state == 2)
                            {
                                observers.TryDequeue(out var _);
                                active--;
                                continue;
                            }
                        }
                    }

                    missed = Interlocked.Add(ref wip, -missed);
                    if (missed == 0)
                    {
                        break;
                    }
                }
            }

internal override void InnerSuccess(InnerObserver sender, R item)
            {
                Remove(sender);
                if (Volatile.Read(ref wip) == 0 && Interlocked.CompareExchange(ref wip, 1, 0) == 0)
                {
                    downstream.OnNext(item);
                    Interlocked.Decrement(ref active);
                }
                else
                {
                    var q = GetOrCreateQueue();
                    q.Enqueue(item);

                    Interlocked.Decrement(ref active);
                    if (Interlocked.Increment(ref wip) != 1)
                    {
                        return;
                    }
                }

                DrainLoop();
            }

internal override void InnerSuccess(InnerObserver sender, T item)
            {
                Remove(sender);
                if (Volatile.Read(ref wip) == 0 && Interlocked.CompareExchange(ref wip, 1, 0) == 0)
                {
                    downstream.OnNext(item);
                    if (Interlocked.Decrement(ref active) != 0)
                    {
                        if (Interlocked.Decrement(ref wip) == 0)
                        {
                            return;
                        }
                    }
                }
                else
                {
                    var q = GetOrCreateQueue();
                    q.Enqueue(item);

                    Interlocked.Decrement(ref active);
                    if (Interlocked.Increment(ref wip) != 1)
                    {
                        return;
                    }
                }

                DrainLoop();
            }

internal override void InnerSuccess(InnerObserver sender, R item)
            {
                Remove(sender);
                if (Volatile.Read(ref wip) == 0 && Interlocked.CompareExchange(ref wip, 1, 0) == 0)
                {
                    downstream.OnNext(item);
                    if (Interlocked.Decrement(ref active) != 0)
                    {
                        if (Interlocked.Decrement(ref wip) == 0)
                        {
                            return;
                        }
                    }
                }
                else
                {
                    var q = GetOrCreateQueue();
                    q.Enqueue(item);

                    Interlocked.Decrement(ref active);
                    if (Interlocked.Increment(ref wip) != 1)
                    {
                        return;
                    }
                }

                DrainLoop();
            }

internal override void InnerSuccess(InnerObserver sender, T item)
            {
                Remove(sender);
                if (Volatile.Read(ref wip) == 0 && Interlocked.CompareExchange(ref wip, 1, 0) == 0)
                {
                    downstream.OnNext(item);
                    Interlocked.Decrement(ref active);
                }
                else
                {
                    var q = GetOrCreateQueue();
                    q.Enqueue(item);

                    Interlocked.Decrement(ref active);
                    if (Interlocked.Increment(ref wip) != 1)
                    {
                        return;
                    }
                }

                DrainLoop();
            }

protected override void InnerConsumed()
            {
                Interlocked.Increment(ref requested);
                DrainBackpressure();
            }

internal override void Drain()
            {
                if (Interlocked.Increment(ref wip) != 1)
                {
                    return;
                }

                var missed = 1;
                var observers = this.observers;
                var downstream = this.downstream;
                var delayErrors = this.delayErrors;
                var sources = this.queue;

                for (; ; )
                {
                    if (Volatile.Read(ref disposed))
                    {
                        while (observers.TryDequeue(out var inner))
                        {
                            inner.Dispose();
                        }

                        while (sources.TryDequeue(out var _)) ;
                    }
                    else
                    {
                        if (!delayErrors)
                        {
                            var ex = Volatile.Read(ref errors);
                            if (ex != null)
                            {
                                Volatile.Write(ref disposed, true);
                                downstream.OnError(ex);
                                DisposableHelper.Dispose(ref upstream);
                                continue;
                            }
                        }

                        if (!noMoreSources && active < maxConcurrency && !sources.IsEmpty)
                        {

                            if (sources.TryDequeue(out var v))
                            {
                                var src = default(ISingleSource<R>);
                                try
                                {
                                    src = RequireNonNullRef(mapper(v), "The mapper returned a null ISingleSource");
                                }
                                catch (Exception ex)
                                {
                                    if (delayErrors)
                                    {
                                        ExceptionHelper.AddException(ref errors, ex);
                                        Volatile.Write(ref done, true);

                                    }
                                    else
                                    {
                                        Interlocked.CompareExchange(ref errors, ex, null);
                                    }
                                    noMoreSources = true;
                                    DisposableHelper.Dispose(ref upstream);
                                    continue;
                                }

                                active++;

                                SubscribeTo(src);
                                continue;
                            }
                        }

                        var d = Volatile.Read(ref done) && sources.IsEmpty;
                        var empty = !observers.TryPeek(out var inner);

                        if (d && empty)
                        {
                            Volatile.Write(ref disposed, true);
                            var ex = Volatile.Read(ref errors);
                            if (ex != null)
                            {
                                downstream.OnError(ex);
                            }
                            else
                            {
                                downstream.OnCompleted();
                            }
                            DisposableHelper.Dispose(ref upstream);
                        }
                        else
                        if (!empty)
                        {
                            var state = inner.GetState();

                            if (state == 1)
                            {
                                downstream.OnNext(inner.value);
                                observers.TryDequeue(out var _);
                                active--;
                                continue;
                            }
                            else
                            if (state == 2)
                            {
                                observers.TryDequeue(out var _);
                                active--;
                                continue;
                            }
                        }
                    }

                    missed = Interlocked.Add(ref wip, -missed);
                    if (missed == 0)
                    {
                        break;
                    }
                }
            }

internal override void Drain()
            {
                if (Interlocked.Increment(ref wip) != 1)
                {
                    return;
                }

                var missed = 1;
                var observers = this.observers;
                var downstream = this.downstream;
                var delayErrors = this.delayErrors;
                var sources = this.sources;

                for (; ; )
                {
                    if (Volatile.Read(ref disposed))
                    {
                        while (observers.TryDequeue(out var inner))
                        {
                            inner.Dispose();
                        }
                        if (sources != null)
                        {
                            this.sources = null;
                            sources.Dispose();
                        }
                    }
                    else
                    {
                        if (!delayErrors)
                        {
                            var ex = Volatile.Read(ref errors);
                            if (ex != null)
                            {
                                Volatile.Write(ref disposed, true);
                                downstream.OnError(ex);
                                continue;
                            }
                        }

                        if (active < maxConcurrency && !done)
                        {

                            var src = default(ISingleSource<T>);

                            try
                            {
                                if (sources.MoveNext())
                                {
                                    src = sources.Current;
                                }
                                else
                                {
                                    done = true;
                                }
                            }
                            catch (Exception ex)
                            {
                                done = true;
                                sources.Dispose();
                                this.sources = null;

                                if (delayErrors)
                                {
                                    ExceptionHelper.AddException(ref errors, ex);
                                }
                                else
                                {
                                    Interlocked.CompareExchange(ref errors, ex, null);
                                }
                                continue;
                            }

                            if (!done)
                            {
                                active++;

                                SubscribeTo(src);
                                continue;
                            }
                            else
                            {
                                sources.Dispose();
                                this.sources = null;
                            }
                        }

                        var d = done;
                        var empty = !observers.TryPeek(out var inner);

                        if (d && empty)
                        {
                            Volatile.Write(ref disposed, true);
                            var ex = Volatile.Read(ref errors);
                            if (ex != null)
                            {
                                downstream.OnError(ex);
                            }
                            else
                            {
                                downstream.OnCompleted();
                            }
                        }
                        else
                        if (!empty)
                        {
                            var state = inner.GetState();

                            if (state == 1)
                            {
                                downstream.OnNext(inner.value);
                                observers.TryDequeue(out var _);
                                active--;
                                continue;
                            }
                            else
                            if (state == 2)
                            {
                                observers.TryDequeue(out var _);
                                active--;
                                continue;
                            }
                        }
                    }

                    missed = Interlocked.Add(ref wip, -missed);
                    if (missed == 0)
                    {
                        break;
                    }
                }
            }

IDisposable ScheduleActual<TState>(TState state, DateTimeOffset dueTime, Func<IScheduler, TState, IDisposable> action)
        {
            var key = new TestSchedulerTaskKey(Interlocked.Increment(ref index), dueTime);
            Add(key, () => {
                key.SetNext(action(this, state));
            });
            return key;
        }

public void Cancel()
            {
                Volatile.Write(ref cancelled, true);
                if (Interlocked.Increment(ref requested) == 1)
                {
                    if (Interlocked.CompareExchange(ref once, 1, 0) == 0)
                    {
                        stateCleanup?.Invoke(state);
                    }
                }
            }

internal void Run()
            {
                Interlocked.Increment(ref available);
                if (outputFused)
                {
                    DrainFused();
                }
                else
                {
                    Drain();
                }
            }

internal IDisposable Schedule(Action action, TimeSpan delay)
        {
            if (Volatile.Read(ref shutdown))
            {
                return EmptyDisposable.Instance;
            }
            long due = SchedulerHelper.NowUTC() + (long)delay.TotalMilliseconds;
            long id = Interlocked.Increment(ref index);

            var tt = new TimedTask(action, due, id, queue);
            if (Offer(tt))
            {
                return tt;
            }
            return EmptyDisposable.Instance;
        }

internal IDisposable Schedule(Action action, TimeSpan initialDelay, TimeSpan period)
        {
            if (Volatile.Read(ref shutdown))
            {
                return EmptyDisposable.Instance;
            }

            SequentialDisposable inner = new SequentialDisposable();
            SequentialDisposable outer = new SequentialDisposable(inner);

            long due = SchedulerHelper.NowUTC() + (long)initialDelay.TotalMilliseconds;
            long id = Interlocked.Increment(ref index);

            long[] count = { 0 };

            Action recursive = null;
            recursive = () =>
            {
                action();
                var duePeriod = due + (long)(++count[0] * period.TotalMilliseconds);
                var idPeriod = Interlocked.Increment(ref index);
                var periodTT = new TimedTask(recursive, duePeriod, idPeriod, queue);
                if (Offer(periodTT))
                {
                    outer.Replace(periodTT);
                }
            };

            var tt = new TimedTask(recursive, due, id, queue);

            if (Offer(tt))
            {
                inner.Replace(tt);
                return outer;
            }

            return EmptyDisposable.Instance;
        }

long NewId()
        {
            return Interlocked.Increment(ref id);
        }

internal bool Offer(Action task)
        {
            if (Volatile.Read(ref shutdown) == 0)
            {
                queue.Offer(task);
                if (Interlocked.Increment(ref wip) == 1)
                {
                    Monitor.Enter(this);
                    try
                    {
                        Monitor.Pulse(this);
                    }
                    finally
                    {
                        Monitor.Exit(this);
                    }
                }
                return true;
            }
            return false;
        }

public bool Pick(out SingleThreadedExecutor exec)
        {
            lock (guard)
            {
                var q = queue;
                if (q == ShutdownQueue)
                {
                    exec = null;
                    return false;
                }
                if (q.Poll(out var e))
                {
                    exec = e.executor;
                    return true;
                }
                var ex = new SingleThreadedExecutor("IOExecutorWorker-" + Interlocked.Increment(ref index));
                executors.Add(ex);
                exec = ex;
                return true;
            }
        }

public void Start()
        {
            SingleThreadedExecutor ys = null;
            for (;;)
            {
                var xs = Volatile.Read(ref executor);
                if (xs != null)
                {
                    break;
                }
                if (ys == null)
                {
                    ys = new SingleThreadedExecutor(name + "-" + (Interlocked.Increment(ref index)));
                }
                if (Interlocked.CompareExchange(ref executor, ys, xs) == xs)
                {
                    break;
                }
            }
        }

void Drain()
            {
                if (Interlocked.Increment(ref wip) != 1L)
                {
                    return;
                }

                var q = queue;
                long missed = 1L;
                for (;;)
                {
                    while (q.Poll(out InterruptibleAction a))
                    {
                        if (Volatile.Read(ref cancelled) != 0)
                        {
                            try
                            {
                                a.Run();
                            }
                            catch
                            {
                                // TODO what to do with these?
                            }
                        }
                    }
                    long w = Volatile.Read(ref wip);
                    if  (w == missed)
                    {
                        missed = Interlocked.Add(ref wip, -missed);
                        if (missed == 0L)
                        {
                            break;
                        }
                    }
                    else
                    {
                        missed = w;
                    }
                }
            }

public void Increment(StatsType statsType)
        {
            Interlocked.Increment(ref _counters[(int)statsType]);
        }

private string GetNextSid() => Interlocked.Increment(ref ssid).ToString(CultureInfo.InvariantCulture);

public long IncrementAndGet()
        {
            return Interlocked.Increment(ref value);
        }

public string GenerateId() => $"{prefix}{Guid.NewGuid().ToString()}:{Interlocked.Increment(ref sequence).ToString()}";