private void VerifyPriorityHint(SafeFileHandle fileHandle, Kernel32Types.PRIORITY_HINT priorityHint)
{
NTTypes.IO_STATUS_BLOCK statusBlock = new NTTypes.IO_STATUS_BLOCK();
NTTypes.FILE_IO_PRIORITY_HINT_INFORMATION ioPriorityHintInfo = new NTTypes.FILE_IO_PRIORITY_HINT_INFORMATION();
IntPtr ioPriorityHintInfoPtr = Marshal.AllocHGlobal(Marshal.SizeOf(ioPriorityHintInfo));
IntPtr queryStatus = FabricFile.NtQueryInformationFile(fileHandle, ref statusBlock, ioPriorityHintInfoPtr, (uint)Marshal.SizeOf(ioPriorityHintInfo), NTTypes.FILE_INFORMATION_CLASS.FileIoPriorityHintInformation);
bool isQuerySuccessful = (queryStatus == IntPtr.Zero) && (statusBlock.Status == 0);
Assert.IsTrue(isQuerySuccessful);
ioPriorityHintInfo = (NTTypes.FILE_IO_PRIORITY_HINT_INFORMATION)Marshal.PtrToStructure(ioPriorityHintInfoPtr, typeof(NTTypes.FILE_IO_PRIORITY_HINT_INFORMATION));
Assert.AreEqual <int>((int)ioPriorityHintInfo.PriorityHint, (int)priorityHint);
}
internal static extern IntPtr NtQueryInformationFile(
SafeHandle FileHandle,
ref NTTypes.IO_STATUS_BLOCK IoStatusBlock,
IntPtr pInfoBlock,
uint length,
NTTypes.FILE_INFORMATION_CLASS fileInformation);
