/// <summary>
/// Unused internal function that can be used to read all USN records
/// </summary>
/// <param name="lastUsn">The USN number to start from</param>
private void GetChangedItems(long lastUsn)
{
const int ALLOCATED_MEMORY = 64 * 1024;
IntPtr allocatedMemory = IntPtr.Zero;
List <KeyValuePair <string, Win32USN.USN_RECORD> > records = new List <KeyValuePair <string, Win32USN.USN_RECORD> >();
try
{
uint bytesRead = 0;
bool more = true;
allocatedMemory = Marshal.AllocHGlobal(ALLOCATED_MEMORY);
Win32USN.READ_USN_JOURNAL_DATA startParams = new Win32USN.READ_USN_JOURNAL_DATA();
startParams.UsnJournalID = m_journal.UsnJournalID;
startParams.StartUsn = lastUsn;
startParams.ReasonMask = Win32USN.USNReason.USN_REASON_ANY;
startParams.ReturnOnlyOnClose = 0;
startParams.Timeout = 0;
startParams.BytesToWaitFor = 0;
while (more)
{
if (!Win32USN.DeviceIoControl(m_volumeHandle, Win32USN.EIOControlCode.FsctlReadUsnJournal,
startParams, (uint)Marshal.SizeOf(typeof(Win32USN.READ_USN_JOURNAL_DATA)),
allocatedMemory, ALLOCATED_MEMORY,
ref bytesRead, IntPtr.Zero))
{
int errorCode = Marshal.GetLastWin32Error();
//If we get no error or EOF the enumeration is completed
if (errorCode == Win32USN.ERROR_HANDLE_EOF || errorCode == Win32USN.ERROR_SUCCESS)
{
break;
}
else
{
throw new Win32Exception(errorCode);
}
}
startParams.StartUsn = ExtractUsnEntries(bytesRead, allocatedMemory, records, out more);
}
//Records now contains all Usn entries
}
finally
{
if (allocatedMemory != IntPtr.Zero)
{
Marshal.FreeHGlobal(allocatedMemory);
allocatedMemory = IntPtr.Zero;
}
}
}
/// <summary>
/// Unused internal function that can be used to read all USN records
/// </summary>
/// <param name="lastUsn">The USN number to start from</param>
private void GetChangedItems(long lastUsn)
{
const int ALLOCATED_MEMORY = 64 * 1024;
IntPtr allocatedMemory = IntPtr.Zero;
List<KeyValuePair<string, Win32USN.USN_RECORD>> records = new List<KeyValuePair<string, Win32USN.USN_RECORD>>();
try
{
uint bytesRead = 0;
bool more = true;
allocatedMemory = Marshal.AllocHGlobal(ALLOCATED_MEMORY);
Win32USN.READ_USN_JOURNAL_DATA startParams = new Win32USN.READ_USN_JOURNAL_DATA();
startParams.UsnJournalID = m_journal.UsnJournalID;
startParams.StartUsn = lastUsn;
startParams.ReasonMask = Win32USN.USNReason.USN_REASON_ANY;
startParams.ReturnOnlyOnClose = 0;
startParams.Timeout = 0;
startParams.BytesToWaitFor = 0;
while (more)
{
if (!Win32USN.DeviceIoControl(m_volumeHandle, Win32USN.EIOControlCode.FsctlReadUsnJournal,
startParams, (uint)Marshal.SizeOf(typeof(Win32USN.READ_USN_JOURNAL_DATA)),
allocatedMemory, ALLOCATED_MEMORY,
ref bytesRead, IntPtr.Zero))
{
int errorCode = Marshal.GetLastWin32Error();
//If we get no error or EOF the enumeration is completed
if (errorCode == Win32USN.ERROR_HANDLE_EOF || errorCode == Win32USN.ERROR_SUCCESS)
break;
else
throw new Win32Exception(errorCode);
}
startParams.StartUsn = ExtractUsnEntries(bytesRead, allocatedMemory, records, out more);
}
//Records now contains all Usn entries
}
finally
{
if (allocatedMemory != IntPtr.Zero)
{
Marshal.FreeHGlobal(allocatedMemory);
allocatedMemory = IntPtr.Zero;
}
}
}
