I want to asynchronously write data to file using WriteFileEx from winapi, but I have a problem with callback.
I'm getting follow error: an argument of type "void (*) (DWORD dwErrorCode, DWORD dwNumberOfBytesTransfered, LPOVERLAPPED lpOverlapped)" is incompatible with parameter of type "LPOVERLAPPED_COMPLETION_ROUTINE"
What am I doing wrong?
Here is code:
// Callback
void onWriteComplete(
DWORD dwErrorCode,
DWORD dwNumberOfBytesTransfered,
LPOVERLAPPED lpOverlapped) {
return;
}
BOOL writeToOutputFile(String ^outFileName, List<String ^> ^fileNames) {
HANDLE hFile;
char DataBuffer[] = "This is some test data to write to the file.";
DWORD dwBytesToWrite = (DWORD) strlen(DataBuffer);
DWORD dwBytesWritten = 0;
BOOL bErrorFlag = FALSE;
pin_ptr<const wchar_t> wFileName = PtrToStringChars(outFileName);
hFile = CreateFile(
wFileName, // name of the write
GENERIC_WRITE, // open for writing
0, // do not share
NULL, // default security
CREATE_NEW, // create new file only
FILE_FLAG_OVERLAPPED,
NULL); // no attr. template
if (hFile == INVALID_HANDLE_VALUE) {
return FALSE;
}
OVERLAPPED oOverlap;
bErrorFlag = WriteFileEx(
hFile, // open file handle
DataBuffer, // start of data to write
dwBytesToWrite, // number of bytes to write
&oOverlap, // overlapped structure
onWriteComplete),
CloseHandle(hFile);
}