public void TimeTest2()
{
MarshalMemoryBlock memory = new MarshalMemoryBlock((long)(1024 * 1024 * 1024) * 3);
DateTime dt = DateTime.Now;
long ltmp = (long)(1024 * 1024);
memory.WriteByte(ltmp, (byte)20);
memory.WriteDatetime(memory.Position, dt);
memory.WriteDouble(memory.Position, 20.5);
memory.WriteFloat(memory.Position, 20.5f);
memory.WriteString(memory.Position, dt.ToString(), Encoding.Unicode);
memory.WriteInt(memory.Position, 20);
memory.WriteLong(memory.Position, 20);
memory.WriteShort(memory.Position, (short)20);
memory.WriteUShort(memory.Position, (ushort)20);
memory.WriteUInt(memory.Position, 20);
memory.WriteULong(memory.Position, 20);
MarshalMemoryBlock mm = new MarshalMemoryBlock(1024);
Stopwatch sw = new Stopwatch();
sw.Start();
for (int i = 0; i < 1000000; i++)
{
memory.WriteBytesDirect(500, memory.StartMemory + (int)ltmp, 0, 50);
memory.WriteUShortDirect(550, 50);
memory.WriteByte(550, 1);
}
sw.Stop();
Debug.Print("10000000:" + sw.ElapsedMilliseconds);
}
/// <summary>
///
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
private MarshalMemoryBlock CompressBlockMemory(ManualHisDataMemoryBlock data)
{
MarshalMemoryBlock block = MarshalMemoryBlockPool.Pool.Get(data.Length * 2 + 28 + 5 + 56);
var histag = mHisTagService.GetHisTag(data.Id);
if (histag == null)
{
return(null);
}
int datasize = 0;
var targetPosition = 28 + 56;
//前56个字节用于统计数据存放
block.WriteInt(56, data.Id);
block.WriteDatetime(56 + 4, data.Time); //时间
block.WriteDatetime(56 + 12, data.EndTime); //结束时间
//block.WriteInt(20, 0); //写入数据大小
block.WriteInt(56 + 24, mTagIds.Count);//写入变量的个数
var qulityoffset = data.QualityAddress;
var comtype = histag.CompressType;//压缩类型
block.WriteByte(targetPosition + 4, (byte)comtype);
var tp = mCompressCach[comtype];
if (tp != null)
{
tp.QulityOffset = (int)qulityoffset;
tp.TagType = histag.TagType;
tp.RecordType = histag.Type;
tp.StartTime = data.Time;
tp.Parameters = histag.Parameters;
tp.Precision = histag.Precision;
tp.TimeTick = data.TimeUnit;
tp.Id = data.Id;
var size = tp.Compress(data, 0, block, targetPosition + 5, data.Length, block, 0) + 1;
block.WriteInt(targetPosition, (int)size);
datasize = (int)(targetPosition + size + 5);
block.WriteInt(56 + 20, datasize); //写入数据大小
}
return(block);
}