private void button1_Click(object sender, EventArgs e)
{
for (int i = 0; i < 1000000; i++)
{
//var buffer = new byte[TestData.Metadata.Length];
//Array.Copy(TestData.Metadata, buffer, TestData.Metadata.Length);
CIztUdpHeader header = CIztUdpHeader.Load(TestData.Header, 0);
CIztMetadata metadata = CIztMetadata.Load(TestData.Header, 64);
CIztPacket packet = CIztPacket.Load(TestData.Header, 0);
}
}
public static CIztUdpHeader Load(byte[] buffer, int offset)
{
CIztUdpHeader header;
if (buffer != null && (offset + LayoutSize) <= buffer.Length)
{
byte[] copydata = new byte[LayoutSize];
Array.Copy(buffer, offset, copydata, 0, LayoutSize);
//GCHandleType.Pinned 允許這個buffer做出來的handle直接取用底下的實體記憶體位置
//相當於允許直接使用底層的C指標
GCHandle handle = GCHandle.Alloc(copydata, GCHandleType.Pinned);
header = (CIztUdpHeader)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(CIztUdpHeader));
handle.Free();
}
else
{
header = new CIztUdpHeader();
}
return(header);
}