private static void GetFileNameFromHandle(object state)
{
FileNameFromHandleState s = (FileNameFromHandleState)state;
s.RetValue = GetFileNameFromHandle(s.Handle, out string fileName);
s.FileName = fileName;
s.Set();
}
private string GetObjectNameFromHandle(IntPtr handle)
{
using (FileNameFromHandleState f = new FileNameFromHandleState(handle))
{
ThreadPool.QueueUserWorkItem(GetObjectNameFromHandle, f);
f.WaitOne(10);
return(f.FileName);
}
}
private static void GetFileNameOfLocalHandle(object state)
{
FileNameFromHandleState s = (FileNameFromHandleState)state;
string fileName;
s.RetValue = GetFileNameOfLocalHandle(s.Handle, out fileName);
s.FileName = fileName;
if (s.IsWaiting)
{
s.Set();
}
}
private static bool GetFileNameFromHandle(IntPtr handle, out string fileName, int wait)
{
using (var f = new FileNameFromHandleState(handle)) {
ThreadPool.QueueUserWorkItem(new WaitCallback(GetFileNameFromHandle), f);
if (f.WaitOne(wait))
{
fileName = f.FileName;
return(f.RetValue);
}
else
{
fileName = string.Empty;
return(false);
}
}
}
private static bool GetFileNameOfLocalHandle(IntPtr handle, out string fileName, int milisecondsTimeout)
{
using (FileNameFromHandleState state = new FileNameFromHandleState(handle))
{
ThreadPool.QueueUserWorkItem(new WaitCallback(GetFileNameOfLocalHandle), state);
if (state.WaitOne(milisecondsTimeout))
{
fileName = state.FileName;
return(state.RetValue);
}
else
{
fileName = string.Empty;
return(false);
}
}
}
private static void GetObjectNameFromHandleFunc(object obj)
{
FileNameFromHandleState state = obj as FileNameFromHandleState;
int guessSize = 1024;
NT_STATUS ret;
IntPtr ptr = Marshal.AllocHGlobal(guessSize);
try
{
while (true)
{
ret = NativeMethods.NtQueryObject(state.Handle,
OBJECT_INFORMATION_CLASS.ObjectNameInformation, ptr, guessSize, out int requiredSize);
if (ret == NT_STATUS.STATUS_INFO_LENGTH_MISMATCH)
{
Marshal.FreeHGlobal(ptr);
guessSize = requiredSize;
ptr = Marshal.AllocHGlobal(guessSize);
continue;
}
if (ret == NT_STATUS.STATUS_SUCCESS)
{
OBJECT_NAME_INFORMATION oti = (OBJECT_NAME_INFORMATION)Marshal.PtrToStructure(ptr, typeof(OBJECT_NAME_INFORMATION));
state.FileName = oti.Name.GetText();
return;
}
break;
}
}
finally
{
if (ptr != IntPtr.Zero)
{
Marshal.FreeHGlobal(ptr);
}
state.Set();
}
}
