我在网上找了很多源码,没有一个可以用2个程序实现互相读写的共享内存功能,一般只能单向传递,没有任何意义,于是我自己封装了一个类,但是看起来没任何问题,就是不能共享,现在我把代码贴出来,请大神帮忙看看
using System;
using System.IO;
using System.IO.MemoryMappedFiles;
using System.Runtime.InteropServices;
using System.Threading;
namespace Demo
{
public class ShareMemory
{
private MemoryMappedFile mmf;
public string MapName = "future";
public int MaxSize = 10 * 1024 * 1024;
private int m_nState = 0;
private int nDataLen = 0;
public ShareMemory()
{
}
public void Create()
{
mmf = MemoryMappedFile.CreateOrOpen(MapName, MaxSize, MemoryMappedFileAccess.ReadWrite);
}
public void Open()
{
mmf = MemoryMappedFile.OpenExisting(MapName);
}
/// <summary>
/// 析构函数
/// </summary>
~ShareMemory()
{
mmf.Dispose();
}
///读数据
public void Read(ref byte[] Data)
{
m_nState = 2;
using (var stream = mmf.CreateViewStream(0, nDataLen)) //创建文件内存视图流 基于流的操作
{
var reader = new BinaryReader(stream);
reader.Read(Data, 0,nDataLen);
}
m_nState = 0;
}
public void Clear()
{
m_nState = 3;
using (var stream = mmf.CreateViewStream(0,MaxSize)) //创建文件内存视图流 基于流的操作
{
var writer = new BinaryWriter(stream);
byte[] Data=new byte[MaxSize];
writer.Write(Data, 0, MaxSize);
nDataLen = 0;
}
m_nState = 0;
}
//将数据写入共享内存中
public void Write(byte[] Data)
{
m_nState = 1;
using (var stream = mmf.CreateViewStream(0,Data.Length)) //创建文件内存视图流 基于流的操作
{
var writer = new BinaryWriter(stream);
writer.Write(Data,0,Data.Length);
nDataLen = Data.Length;
}
m_nState = 0;
}
public int GetDataLenth()
{
return nDataLen;
}
/// <summary>
/// 0空闲,1写,2读,3清除中
/// </summary>
/// <returns></returns>
public int GetState()
{
return m_nState;
}
}
}
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