进程间通讯 共享内存 问题
这是写一个字符串信息:
int Length = strUID.GetLength();
HANDLE hmap;
hmap = ::CreateFileMapping((HANDLE)-1,NULL,PAGE_READONLY,0,Length,_T("MemoShare"));
if(hmap != NULL && GetLastError() == ERROR_ALREADY_EXISTS)
{
CString strUIDMap = (CString)(LPCTSTR)(LPSTR)(char*)::MapViewOfFile(hmap,FILE_MAP_READ,0,0,0);
strcpy((char*)(LPSTR)(LPCTSTR)strUIDMap, (char*)(LPSTR)(LPCTSTR)strUID);
strTemp = "TestMemoShare";
CWnd *pWnd=CWnd::FindWindow(NULL,strTemp);
pWnd->SendMessage(WM_IMGRETRIVED,0,0); //通过消息通知其他进程去读共享内存
UnmapViewOfFile(&strUIDMap);
CloseHandle(hmap);
}
这是读取内存信息:
HANDLE hmap;
CString str="";
hmap = ::OpenFileMapping(FILE_MAP_READ, FALSE, "DCMServMemoShare");
if (hmap != NULL)
{
str = (CString)(LPCTSTR)(LPSTR)(char*)::MapViewOfFile(
hmap, FILE_MAP_ALL_ACCESS, 0, 0, 0);
UnmapViewOfFile(&str);
CloseHandle(hmap);
AfxMessageBox(str);
}else{
int nError = GetLastError();
}
读出来的str是TestMemoShare程序的路径。
请高手指点。