C#进程间共享内存,内存映象(MMF)

需要调用以下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);

创建映象空间

IntPtr fileMapping =

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

获得映象空间

IntPtr mappedView =

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

读写封装

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]);
}

序列化封装读写

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);
}