public class RingBufferManager
{
  public byte[] Buffer { get; set; } // 存放內(nèi)存的數(shù)組
  public int DataCount { get; set; } // 寫(xiě)入數(shù)據(jù)大小
  public int DataStart { get; set; } // 數(shù)據(jù)起始索引
  public int DataEnd { get; set; }  // 數(shù)據(jù)結(jié)束索引
  public RingBufferManager(int bufferSize)
  {
    DataCount = 0; DataStart = 0; DataEnd = 0;
    Buffer = new byte[bufferSize];
  }

  public byte this[int index]
  {
    get
    {
      if (index >= DataCount) throw new Exception("環(huán)形緩沖區(qū)異常，索引溢出");
      if (DataStart + index < Buffer.Length)
      {
        return Buffer[DataStart + index];
      }
      else 
      {
        return Buffer[(DataStart + index) - Buffer.Length];
      }
    }
  }

  public int GetDataCount() // 獲得當(dāng)前寫(xiě)入的字節(jié)數(shù)
  {
    return DataCount;
  }

  public int GetReserveCount() // 獲得剩余的字節(jié)數(shù)
  {
    return Buffer.Length - DataCount;
  }

  public void Clear()
  {
    DataCount = 0;
  }

  public void Clear(int count) // 清空指定大小的數(shù)據(jù)
  {
    if (count >= DataCount) // 如果需要清理的數(shù)據(jù)大于現(xiàn)有數(shù)據(jù)大小，則全部清理
    {
      DataCount = 0;
      DataStart = 0;
      DataEnd = 0;
    }
    else
    {
      if (DataStart + count >= Buffer.Length)
      {
        DataStart = (DataStart + count) - Buffer.Length;
      }
      else 
      {
        DataStart += count;
      }
      DataCount -= count;
    }
  }

  public void WriteBuffer(byte[] buffer, int offset, int count)
  {
    Int32 reserveCount = Buffer.Length - DataCount;
    if (reserveCount >= count)             // 可用空間夠使用
    {
      if (DataEnd + count < Buffer.Length)      // 數(shù)據(jù)沒(méi)到結(jié)尾
      {
        Array.Copy(buffer, offset, Buffer, DataEnd, count);
        DataEnd += count;
        DataCount += count;
      }
      else      // 數(shù)據(jù)結(jié)束索引超出結(jié)尾 循環(huán)到開(kāi)始
      {
        System.Diagnostics.Debug.WriteLine("緩存重新開(kāi)始....");
        Int32 overflowIndexLength = (DataEnd + count) - Buffer.Length;   // 超出索引長(zhǎng)度
        Int32 endPushIndexLength = count - overflowIndexLength;       // 填充在末尾的數(shù)據(jù)長(zhǎng)度
        Array.Copy(buffer, offset, Buffer, DataEnd, endPushIndexLength);
        DataEnd = 0;
        offset += endPushIndexLength;
        DataCount += endPushIndexLength;
        if (overflowIndexLength != 0)
        {
          Array.Copy(buffer, offset, Buffer, DataEnd, overflowIndexLength);
        }
        DataEnd += overflowIndexLength;                   // 結(jié)束索引
        DataCount += overflowIndexLength;                  // 緩存大小
      }
    }
    else 
    {
      // 緩存溢出，不處理
    }
  }

  public void ReadBuffer(byte[] targetBytes,Int32 offset, Int32 count) 
  {
    if (count > DataCount) throw new Exception("環(huán)形緩沖區(qū)異常，讀取長(zhǎng)度大于數(shù)據(jù)長(zhǎng)度");
    Int32 tempDataStart = DataStart;
    if (DataStart + count < Buffer.Length)
    {
      Array.Copy(Buffer, DataStart, targetBytes, offset, count);
    }
    else 
    {
      Int32 overflowIndexLength = (DataStart + count) - Buffer.Length;  // 超出索引長(zhǎng)度
      Int32 endPushIndexLength = count - overflowIndexLength;       // 填充在末尾的數(shù)據(jù)長(zhǎng)度
      Array.Copy(Buffer, DataStart, targetBytes, offset, endPushIndexLength);
      
      offset += endPushIndexLength;
      
      if (overflowIndexLength != 0)
      {
        Array.Copy(Buffer, 0, targetBytes, offset, overflowIndexLength);
      }
    }
  }


  public void WriteBuffer(byte[] buffer)
  {
    WriteBuffer(buffer, 0, buffer.Length);
  }

}

 int len = sConn.Receive(receiveBuffer, 0, receiveBuffer.Length, SocketFlags.None, out se);
if (len <= 0) throw new Exception("disconnect..");
if (len > 0)
{
  lock (LockReceiveBuffer)
  {
    while (len + receiveBufferManager.DataCount > MAX_BUFFER_LEN)    // 緩存溢出處理
    {
      Monitor.Wait(LockReceiveBuffer,10000);
    }
    receiveBufferManager.WriteBuffer(receiveBuffer, 0, len);
    Monitor.PulseAll(LockReceiveBuffer);
  }
} 

 lock (LockReceiveBuffer)
{
  freame_byte = new byte[frameLen];
  receiveBufferManager.ReadBuffer(freame_byte, 0, frameLen);
  receiveBufferManager.Clear(frameLen);
｝