public LocalStorageDevice(string filename, bool enablePrivileges = false,
bool useIoCompletionPort = false, bool unbuffered = false, bool deleteOnClose = false)
{
this.filename = filename;
this.enablePrivileges = enablePrivileges;
this.useIoCompletionPort = useIoCompletionPort;
if (enablePrivileges)
{
Native32.EnableProcessPrivileges();
}
Native32.GetDiskFreeSpace(filename.Substring(0, 3),
out lpSectorsPerCluster,
out lpBytesPerSector,
out lpNumberOfFreeClusters,
out lpTotalNumberOfClusters);
uint fileAccess = Native32.GENERIC_READ | Native32.GENERIC_WRITE;
// uint fileShare = unchecked(((uint)FileShare.ReadWrite & ~(uint)FileShare.Inheritable));
uint fileShare = unchecked (((uint)FileShare.Read & ~(uint)FileShare.Inheritable));
uint fileCreation = unchecked ((uint)FileMode.OpenOrCreate);
uint fileFlags = Native32.FILE_FLAG_OVERLAPPED;
if (unbuffered)
{
fileFlags = fileFlags | Native32.FILE_FLAG_NO_BUFFERING;
}
if (deleteOnClose)
{
fileFlags = fileFlags | Native32.FILE_FLAG_DELETE_ON_CLOSE;
}
logHandle = Native32.CreateFileW(filename,
fileAccess,
fileShare,
IntPtr.Zero,
fileCreation,
fileFlags,
IntPtr.Zero);
if (enablePrivileges)
{
Native32.EnableVolumePrivileges(filename, logHandle);
}
if (useIoCompletionPort)
{
ioCompletionPort = Native32.CreateIoCompletionPort(
logHandle,
IntPtr.Zero,
(uint)logHandle.DangerousGetHandle().ToInt64(),
0);
}
ThreadPool.BindHandle(logHandle);
}