问题
I am trying to use combination of functions CreateFileMapping , MapViewOfFile, FlushViewOfFile.
the total buffer size is more than the mapped view. example buffer is 50KB. and mapped view is 2KB. in such scenario, i want to write the total buffer to a physical file, using the above function.
First part i am able to write to file. but the remaining part how to write to file. I mean, how to move to next page and write the next part of data.
#define MEM_UNIT_SIZE 100
-first module...Memory map creator
GetTempPath (256, szTmpFile);
GetTempFileName (szTmpFile, pName, 0, szMMFile);
hFile = CreateFile (szMMFile, GENERIC_WRITE | GENERIC_READ, FILE_SHARE_WRITE,
NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_TEMPORARY, NULL);
HANDLE hFileMMF = CreateFileMapping( hFile ,NULL,PAGE_READWRITE,0,
(MEM_UNIT_SIZE),pName)
-second module... Memory writer
long lBinarySize = 1000;
long lPageSize = MEM_UNIT_SIZE;
HANDLE hFileMMF = OpenFileMapping(FILE_MAP_WRITE,FALSE,pMemName);
LPVOID pViewMMFFile = MapViewOfFile(hFileMMF,FILE_MAP_WRITE,0,0, lPageSize );
CMutex mutex (FALSE, _T("Writer"));
mutex.Lock();
try
{
ASSERT(FALSE);
CopyMemory(pViewMMFFile,pBinary,lPageSize); // write
FlushViewOfFile(pViewMMFFile,lPageSize);
// first 100 bytes flushed to file.
//how to move to next location and write next 900 bytes..<---??
}
catch(CException e)
{
...
}
please share if you have any suggestion. thanks in advance, haranadh
来源：https://stackoverflow.com/questions/8050773/how-to-get-the-next-page-part-view-of-file-if-i-read-part-of-file-using-mapview