c#中不同进程内存共享

if (strName.Length > 0) {

//创建内存共享体 (INVALID_HANDLE_VALUE)

m_hSharedMemoryFile = API.CreateFileMapping(API.INVALID_HANDLE_VALUE, IntPtr.Zero, (uint)API.PAGE_READWRITE, 0, (uint)lngSize, strName); if (m_hSharedMemoryFile == IntPtr.Zero) {

m_bAlreadyExist = false; m_bInit = false;

return MemoryResult.Failed; //创建共享体失败 } else {

if (API.GetLastError() == API.ERROR_ALREADY_EXISTS) //已经创建 {

m_bAlreadyExist = true; }

else //新创建 {

m_bAlreadyExist = false; } }

//--------------------------------------- //创建内存映射

m_pwData = API.MapViewOfFile(m_hSharedMemoryFile, API.FILE_MAP_WRITE, 0, 0, (uint)lngSize);

if (m_pwData == IntPtr.Zero) {

m_bInit = false;

API.CloseHandle(m_hSharedMemoryFile);

return MemoryResult.Failed; //创建内存映射失败 } else {

m_bInit = true;

if (m_bAlreadyExist == false) { //初始化 } }

//---------------------------------------- } else {

return MemoryResult.Failed; //参数错误 }

return MemoryResult.Success; //创建成功 }

///

if (m_bInit) {

API.UnmapViewOfFile(m_pwData); API.CloseHandle(m_hSharedMemoryFile); } }

///

public unsafe MemoryResult Read(out T obj) {

obj = default(T);

byte[] bytData = new byte[m_size];

if (m_bInit) {

Marshal.Copy(m_pwData, bytData, 0, m_size); if (m_lastData != null) {

fixed (byte* p1 = m_lastData) {

fixed (byte* p2 = bytData) {

if (API.memcmp(p1, p2, m_size) == 0) return MemoryResult.NoChange; } } }

m_lastData = bytData;

var fmt = new BinaryFormatter();

using (var ms = new MemoryStream(bytData)) { try {

obj = (T)fmt.Deserialize(ms); }