How to CopyMemory to copy struct using FileMapping? - c

Question

I have following code, after CopyMemory my pBuf is empty, it contains no data from newCommand, or when I want to add something in that struct it doesnt work... What am I doing wrong?
struct StCommand
{
TCHAR sourcePath[MAX_PATH];
TCHAR sourceFile[MAX_PATH];
TCHAR fileName[MAX_PATH];
bool endThread;
};
handlesInstance.mapFileHandle = CreateFileMapping(
INVALID_HANDLE_VALUE, // use paging file
NULL, // default security
PAGE_READWRITE, // read/write access
0, // maximum object size (high-order DWORD)
sizeof(StCommand), // maximum object size (low-order DWORD)
handlesInstance.valueBuffer); // name of mapping object
if (handlesInstance.mapFileHandle == NULL)
{
_tprintf(TEXT("Could not create file mapping object (%d).\n"),
GetLastError());
return 0;
}
handlesInstance.pBuf = (StCommand*) MapViewOfFile(
handlesInstance.mapFileHandle, // handle to map object
FILE_MAP_ALL_ACCESS, // read/write permission
0,
0,
sizeof(StCommand));
if (handlesInstance.pBuf == NULL)
{
_tprintf(TEXT("Could not map view of file (%d).\n"),
GetLastError());
return 0;
}
StCommand newCommand = { NULL, NULL, NULL, false };
CopyMemory(handlesInstance.pBuf, &newCommand, sizeof(StCommand));
CopyFiles(*handlesInstance.pBuf);
Here is CopyFiles function, where I send (*handlesInstance.pBuf) and I want to set values of pBuf here, to create path, to copy file later
void CopyFiles(StCommand stCommand)
{
while (!stCommand.endThread)
{
DWORD dwWaitEventResult;
dwWaitEventResult = WaitForSingleObject(handlesInstance.dataInEvent, INFINITE);
switch (dwWaitEventResult)
{
// Event object was signaled
case WAIT_OBJECT_0:
{
//Command processing
if (!stCommand.endThread)
{
GetSzSetting(pathValueName, REPOSITORY_PATH);
TCHAR newFile[MAX_PATH];
_tcscpy_s(newFile, handlesInstance.valueBuffer);
_tcscat_s(newFile, _T("/"));
TCHAR buffer[MAX_PATH];
swprintf_s(buffer, _T("%d"), GetDwordSetting(indexValueName, 0));
_tcscat_s(newFile, buffer);
_tcscat_s(newFile, _T("."));
_tcscat_s(newFile, stCommand.fileName);
TCHAR oldFile[MAX_PATH];
_tcscpy_s(oldFile, stCommand.sourcePath);
_tcscat_s(oldFile, _T("/"));
_tcscat_s(oldFile, stCommand.fileName);
if (CopyFile(oldFile, newFile, FALSE))
{
_tprintf(_T("File %s copied successfully into repository.\n"), stCommand.fileName);
SetDwordSetting(indexValueName, GetDwordSetting(indexValueName, 0) + 1);
}
else
{
_tprintf(_T("Could not copy file %s.\n"), stCommand.fileName);
_tprintf(_T("Failed with error code: %d\n"), GetLastError());
}
}
ResetEvent(handlesInstance.dataInEvent);
if (!SetEvent(handlesInstance.dataOutEvent))
{
printf("SetEvent OutEvent failed (%d)\n", GetLastError());
}
break;
}
// An error occurred
default:
printf("Wait error (%d)\n", GetLastError());
break;
}
}
}