用檔案對應（File Mapping）實現進程間記憶體共用

標籤：

HANDLE hMapFile=NULL;LPBYTE lpMapAddress=NULL;  1.建立命名檔案對應物件hMapFile = CreateFileMapping(INVALID_HANDLE_VALUE,//建立記憶體對應檔(不使用磁碟檔案)                              NULL,                             PAGE_READWRITE,                             0,                             1024,//映射的記憶體地區大小                             "FileMapping_A9279E4A75917E23C2A");if(hMapFile==NULL){    TRACE("CreateFileMapping == NULL\n");} 2.開啟已經存在的命名檔案對應物件hMapFile = OpenFileMapping(                           FILE_MAP_ALL_ACCESS,                           FALSE,                           "FileMapping_A9279E4A75917E23C2A");if(hMapFile==NULL){    TRACE("OpenFileMapping == NULL\n");} 3.擷取映射的記憶體空間首址lpMapAddress = (LPBYTE)MapViewOfFile(                                     hMapFile,// Handle to mapping object.                                      FILE_MAP_ALL_ACCESS,// Read/write permission.                                      0,// high-order DWORD of offset.                                      0,// low-order DWORD of offset.                                      1024);// number of bytes to map.  if (lpMapAddress==NULL){    TRACE("MapViewOfFile == NULL\n");} 4.使用：此時可以使用memset,memcpy等函數對這片記憶體進行操作...; 5.使用完之後的釋放if (lpMapAddress!=NULL){    UnmapViewOfFile(lpMapAddress);}if (hMapFile!=NULL){    CloseHandle(hMapFile);}

用檔案對應（File Mapping）實現進程間記憶體共用