C#進程間共用記憶體,記憶體映象(MMF)

需要調用以下WINAPI

[DllImport("Kernel32.dll",EntryPoint="CreateFileMapping",
     SetLastError=true,CharSet=CharSet.Unicode)]
internal static extern IntPtr CreateFileMapping(uint hFile,
SecurityAttributes lpAttributes, uint flProtect,
  uint dwMaximumSizeHigh, uint dwMaximumSizeLow, string lpName);
   
[DllImport("Kernel32.dll",EntryPoint="MapViewOfFile",
SetLastError=true,CharSet=CharSet.Unicode)]
internal static extern IntPtr MapViewOfFile(IntPtr hFileMappingObject,
  uint dwDesiredAccess, uint dwFileOffsetHigh,
  uint dwFileOffsetLow, uint dwNumberOfBytesToMap);
   
[DllImport("Kernel32.dll",EntryPoint="UnmapViewOfFile",
SetLastError=true,CharSet=CharSet.Unicode)]
[return : MarshalAs( UnmanagedType.VariantBool )]
internal static extern bool UnmapViewOfFile(IntPtr lpBaseAddress);

建立映象空間

IntPtr fileMapping =

　　NTKernel.CreateFileMapping(0xFFFFFFFFu,null,(uint)access,0,(uint)size,name);<----名稱.大小

獲得映象空間

IntPtr mappedView =

　　NTKernel.MapViewOfFile(fileMapping,(uint)access,0,(uint)offset,(uint)size);<----位移.大小

讀寫封裝

public byte ReadByte(int offset)
{
  return Marshal.ReadByte(mappedView,offset);
}
public void WriteByte(byte data, int offset)
{
  Marshal.WriteByte(mappedView,offset,data);
}
public int ReadInt32(int offset)
{
  return Marshal.ReadInt32(mappedView,offset);
}
public void WriteInt32(int data, int offset)
{
  Marshal.WriteInt32(mappedView,offset,data);
}

public void ReadBytes(byte[] data, int offset)
{
  for(int i=0;i<data.Length;i++)
    data[i] = Marshal.ReadByte(mappedView,offset+i);
}
public void WriteBytes(byte[] data, int offset)
{
  for(int i=0;i<data.Length;i++)
    Marshal.WriteByte(mappedView,offset+i,data[i]);
}

序列化封裝讀寫

public object ReadDeserialize(int offset, int length)
{
  byte[] binaryData = new byte[length];
  ReadBytes(binaryData,offset);
  System.Runtime.Serialization.Formatters.Binary.BinaryFormatter formatter
    = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
  System.IO.MemoryStream ms = new System.IO.MemoryStream(
   binaryData,0,length,true,true);
  object data = formatter.Deserialize(ms);
  ms.Close();
  return data;
}
public void WriteSerialize(object data, int offset, int length)
{
  System.Runtime.Serialization.Formatters.Binary.BinaryFormatter formatter
    = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
  byte[] binaryData = new byte[length];
  System.IO.MemoryStream ms = new System.IO.MemoryStream(
   binaryData,0,length,true,true);
  formatter.Serialize(ms,data);
  ms.Flush();
  ms.Close();
  WriteBytes(binaryData,offset);
}